Hafler Trans-nova TRM6 Installation And Operation Manual

TRM6

MONITORING SYS

Installation & Operation

®

®

DESIGNED AND

ASSEMBLED IN THE

USA

MONITORING SYSTEM

Declaration of Conformity

Application of Council Directive: 73/23/EEC (low voltage directive)

Standard(s) to which Conformity is Declared: EN55103-1

EN55103-2

EN60065 (safety)

Manufacturer’s Name: Hafler

Manufacturer’s Address: 546 South Rockford Drive, Tempe, Arizona 85281, U.S.A.

Importer’s Name: _______________________________________________________

Importer’s Address: _______________________________________________________

Type of Equipment:

Model No.: TRM6

Serial Number:

Year of Manufacture: 1998 1999 2000 2001 2002

2-channel Audio Power Amplifier/Speaker

I, the undersigned, hereby declare that the equipment specified above conforms

to the above Directive(s) and Standard(s)

Place: Hafler

12/01/98

Date: James C. Strickland, VP Engineering

P ERFORMANCE SPECIFICATIONS

TRM6

Free Field Frequency Response 55Hz-21kHz, ±2dB
Peak Acoustic Output ≥119dB (per pair w/music @ 1m)
Total Harmonic Distortion (THD) <0.5%, 150Hz-21kHz (90dB @ 1m on axis)
High Frequency Driver 1" (25mm) Vifa Soft Dome
Low Frequency Driver 6.5" (165mm) Polypropylene Cone/

Inverted Nitrile Rubber Surround
Magnetically Shielded

3

Cabinet 0.26 ft
Front Panel: Power Switch

Rear Panel: XLR Balanced Input

Dimensions 8.875"W x 13.25"H x 11.50"D

Net Weight 23 lbs. (10.43kg)

(7.3 liters) Vented

System LED (Power/Clip/Thermal)

RCA Unbalanced Jack
Unbalanced/Balanced DIP Switch
Input Sensitivity DIP Switches
Bass Rolloff DIP Switches
Bass Shelving DIP Switches
Treble Shelving DIP Switches
IEC Standard Line Input / AC Line Fuse

(22.54cm x 33.65cm x 29.21cm)

Frequency Response

@ 1m on axis

Energy Time Curve

A

MPLIFIER SECTION

Power Rating FTC (20Hz-20kHz, 0.1% THD)

35 Watts RMS @ 6 ohms (high frequency)
50 Watts RMS @ 4 ohms (low frequency)

Signal-to-Noise >100dB
CMRR >70dB typical @ 1kHz
Input Impedance 47kΩ per phase balanced, 47kΩ unbalanced
Input Sensitivity Range 500mV to 3V (unbalanced)

275mV to 1.5V (per phase balanced)
(+4dB, +1dB, –2dB, –5dB, –8dB, –11dB)

Gain +33dB max. to +18dB min.
Power Consumption Idle Power: 11W / 150mA @ 115 VAC

(both channels driven) Idle Power: 11W / 75mA @ 230 VAC

Normal Operation: 55W / 600mA @ 120 VAC
Normal Operation: 54W / 310mA @ 230VAC
Full Power: 139W / 1.37A @ 120VAC
Full Power: 130W / 680mA @ 230VAC

C

ROSSOVER SECTION

Crossover Frequency 3.2kHz
Crossover Slope 24dB/octave Linkwitz-Riley
Subsonic Filter Selectable 30Hz or 60Hz @ 12dB/octave
Bass Shelving 30Hz to 200Hz, ±4dB

(+4dB, +2dB, 0dB, –2dB, –4dB)

Treble Shelving 5kHz to 20kHz, ±4dB

(+4dB, +2dB, 0dB, –2dB, –4dB)

Specifications are subject to change without notice.

– i –

13.25”

Horizontal Polar Response

Front View

8.875”

Dimensions

Side View

11.50”

NOTICE - IMPORTANT SAFETY INFORMATION

The lightning flash with arrowhead symbol within an equilateral triangle
is intended to alert the user to the presence of uninsulated "dangerous

CAUTION

RISK OF ELECTRIC SHOCK

DO NOT OPEN

WARNING:

DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE.

TO PREVENT FIRE OR SHOCK HAZARD

!

voltage" within the product's enclosure, that may be of sufficient magni­tude to constitute a risk of electric shock to persons.

The exclamation point within an equilateral triangle is intended to alert
the user of the presence of important operating and maintenance
(servicing) instructions in the literature accompanying the appliance.

1. READ INSTRUCTIONS

All the safety and operating instructions of your Hafler equipment
should be read before power is applied to the equipment.

2. RETAIN OWNER'S MANUAL

These safety and operating instructions should be retained for
future reference.

3. HEED WARNINGS

All warnings on the equipment and in the operating instructions are
important and should be followed.

4. FOLLOW INSTRUCTIONS

All operating and use instructions are important and should be
followed.

5. HEAT

The equipment should be kept away from areas of high tempera­ture, i.e., heater vents, radiators, stoves/ovens, fireplaces, etc.

6. VENTILATION

The equipment should be used in an area suitable for proper
ventilation. Care should be taken not to impede airflow in and
around the cabinet.

7. WATER AND MOISTURE

The equipment should not be used in or around water, such as a
bathtub, sink, or swimming area. Also, the equipment should not
be used in areas prone to flooding, such as a basement.

8. POWER SOURCES

The equipment should be connected only to a power source of the
same voltage and frequency as that listed on the rear panel above
the power cord entry point.

9. POWER CORD PROTECTION

Power cords should be arranged so they do not interfere with the
movement of objects in the room: people, fan blades, utility carts,
etc. Also, care should be taken that the cord is not pinched or cut,
and placed so it is not in danger of being pinched or cut, as in under
a rug, around a tight corner, etc.

connection. It is important that the blades of the equipment’s plug
be able to fully insert into the mating receptacle. Never remove the

round grounding pin on the plug in an attempt to mate to a two
wire ungrounded receptacle: use a grounding adaptor with the

grounding tab or wire suitably connected to earth ground.

11. NON-USE PERIODS

During periods of extended non-use, the power cord should be
unplugged from the power source.

12. CLEANING

The equipment should be cleaned only as detailed in the operating
instructions.

13. OBJECT AND LIQUID ENTRY

Care should be taken so that objects and/or liquids, such as cleaning
fluids or beverages, are not spilled into the enclosure of the
equipment.

14. DAMAGE REQUIRING SERVICE

Hafler equipment should be serviced by qualified service personnel
when:

A. The power supply cord or plug has been damaged, or

B. Objects have fallen onto, or liquid has been spilled into the

equipment, or

C. The equipment has been exposed to rain, or

D. The equipment does not appear to operate normally or

exhibits a marked change in performance, or

E. The equipment has been dropped, or the enclosure has

been damaged.

15. SERVICING

The user should not attempt to service the equipment beyond that
which is described in the operating instructions. All other service
should be referred to qualified service personnel.

10. POWER CORD GROUNDING

The power supply cord is of a three wire grounded type, designed
to reduce the risk of electric shock sustained from a live cabinet. It
is assumed to be of suitable length for most uses of the equipment.
The use of extension cords and power strips is discouraged unless
they are of suitable rating to deliver the required total current for
safe operation of all connected equipment. Furthermore, extension
cords or power strips must provide the same three wire grounded

16. CARTS AND STANDS

The equipment should be used with carts or stands only of sufficient
strength and stability for the use intended.

An equipment and cart combination should be moved with care.
Quick stops and starts, excessive force, and uneven surfaces may

cause the equipment and cart combination to topple.

– ii –

ADVERTENCIA – INFORMACION DE SEGURIDAD IMPORTANTE

El símbolo de flecha relámpago dentro de un triángulo equilátero, es para
alertar al usario de la presencia de “voltajes peligrosos” no aislados en el
interior del aparato, los cuales pueden ser de suficiente magnitud para
constituir un riesgo de choque eléctrico a las personas.

El símbolo de exclamación dentro de un triángulo equilátero, es para alertar
al usuario de la presencia de instrucciones importantes de operación y
mantenimiento (servicio) en la documentación que acompaña al equipo.

ESPAÑOL

PELIGRO

RIESGO DE DESCARGA

ELÉCTRICA NO ABRÍR.

PRECAUCÍON:

Para Prevenir el incendio o la descarga electrica, no

exponer este equipo a la lluvia o a la humedad.

!

1. LEA LAS INSTRUCCIONES

Todas las instrucciones de seguidad y operación de su equipo
Hafler, deben ser leídas antes de que el equipo sea conectado
dléctricamente.

2. CONSERVE EL MANUAL DEL PROPIETARIO

Estas instrucciones de seguridad y operación, deben ser conservadas
para futuras referencias.

3. CUADROS DE ADVERTENCIAS

Todas las advertencias en el equipo y en las instrucciones de
operación, son importantes y deben ser seguidas.

4. SIGA LAS INSTRUCCIONES

Todas las instrucciones de uso y operación son importantes y deben
ser seguidas.

5. CALOR

El equipo debe ser mantenido lejos de areas de alta temperatura,
como por ejemplo: ventilaciones de calentadores, radiadores,
estufas/hornos, hogueras, etc.

6. VENTILACION

El equip debe ser usado en áreas con ventilación adecuada. Deben
er tornadas las precauciones necesarias para no impedir el flujo de
aire dentro y alrededor del aparato.

poder suministrar la corrioente requerida pra la operación segura
de todo el equipo conectado. Aun más, las extensiones deben
proveer de la misma conección aterrada de tres hiles. Es importante
que el enchufe se pueda introducir completamente en el receptáculo.
Nunca remeva el pin de aterramiento en un intento por conectar el
cable en un receptáculo de dos hilos no aterrado: use un adaptador
de aterramiento que esté adecuadamente conectado a un punto de
tierra.

11. PERIODOS SIN USO

Durante períodos prolongados sin uso del equipo, el cable de
corriente debe ser desconectado de la fuente de electrixidad.

12. LIMPIEZA

El equip debe ser limpiado solo en la forma que se detalla en las
instrucciones de operación.

13. INTRODUCCIÓN DE OBJETOS Y LIQUIDO

Deben ser tornadas precauciones con el fin de que objetos y/ó
líquidos, tales como fluidos de limpieza y gaseosas, no sean
derramados dentro del chassis del aparato.

14. DAÑOS QUE REQUIEREN DE SERVICIO

Los equipos Hafler deben ser llevados a servicio por personal
calificado cuando:

7. AGUA Y HUMEDAD

El equipo no debe ser usado en el agua ó alrededor de ésta, tales
como en una bañera, tanque o áreas de nado. También, el equipo
no debe ser usado en áreas propensas a inundaciones, tales como
en un sótano.

8. FUENTES DE PODER

El equipo debe ser conectado a una fuente de poder del mismo
voltaje y frecuencia que el indicado en el panel trasero sobre el
punto de entrada del cable de corriente.

9. PROTECCION DEL CABLE DE CORRIENTE

Los cables de corriente deben ser dispuestos de forma tal que no
interfieran con el movimiento de objetos en la sala: personas, aspas
de ventilación, carretillas, etc. También, es necesario tener cuidado
de que el cable no esté punzado o cortado, y debe estar ubicado de
forma tal que esto no ocurra, como podría suceder debajo de una
alfombra o al pasar el cable por una esquina aguda, etc.

10. ATERRAMIENTO DEL CABLE DE CORRIENTE

El cable de corriente es del tipo aterrado de tres hilos, diseñado para
reducir el riesgo de una descarga eléctrica procendent de un chasis
energizado. Se asume que su longitud es suficiente para la mayoría
de usos del equipo. El uso de extensiones y multienchufes no es
recomendado, a menos que tengan el amperaje adecuado para

A. El cable de corriente ó el enchufe haya sido dañado, ó

B. Objetos ó líquido hayan sido introducidos ó derramado en
el equipo, ó

C. El equipo haya sido expuesto a lluvia, ó

D. El equipo aparenta no operar normalmente ó exhibe un
marcado cambio en su desempeño, ó

E. El equipo se ha caído, o el chassis ha sido golpeado.

15. SERVICIO

El usuario no deberá intentar darle servicio al equipo más allá de lo
que está descrito en el instructivo de operación. Todo lo demás,
deberá ser referido a servicio por personal calificado.

16. CARRETILLAS Y SOPORTES

El equipo podrá ser usado con carretillas y soportes que tengan la
fortaleza y estabilidad suficiente para el uso previsto.

La combinación equipo/carretilla deberá ser movida con cuidado.
Rápidas paradas y arranques, excesiva fuerza y superficies imparejas,
pueden causar el volcamiento del conjunto de carretilla/equipo.

– iii –

ATTENTION: INFORMATIONS IMPORTANTES DE SÉCURITÉ

La lumière clignotante du symbole de la flêche à l'intérieur d'un triangle
équilatéral, à pour objet d'alerter l'utilisateur de la présence “d'un voltage
dangereux” non-isolé à l'intérieur du produit, qui pourrait être de magnitude
suffisante au risque d'éléctrocution.

FRANÇAIS

ATTENTION

RISQUE DE CHOC

ÉLECTRIQUE NE PAS OUVRIR

!

AVERTISSEMENT:

Afin de prévenir les risques de feu ou de choc, ne pas

exposer cet appareil à la pluie ou à l'humidité.

1. LIRE LES INSTRUCTIONS

Le mode d'emploi et les mesures de sécurité de votre équipement
Hafler devraient être consultés avant sa mise en marche.

2. CONSERVER LE GUIDE DE L'UTILISATEUR

Le mode e'emploi et les mesures de sécurité devraient être
conservés pour des références futures.

3. CONSIDÉRATIONS DE MISE EN GARDE

Le mode d'emploi et les mises en garde concernant cet équipement
sont de grande importance et devraient être suivis.

4. SUIVRE LE MODE E'EMPLOI

Le mode d'emploi et les conseils d'utilisation sont importants et
devraient être suivis.

5. CHALEUR

Le matériel devrait être préservé loin de toute source de chaleur:
radiateurs, cuisinière/fours, cheminées,…etc.

6. VENTILATION

Le matériel devrait être utilisé dans un endroit à bonne ventila­tion. Il reste nécessaire de respecter la circulation de flux d'air à
l'intérier et autour du meuble.

Le point d'exclamation, à l'intériur d'un triangle équilatéral, à pour objet de
prévenir l'utilisateur de l'importance des instructions de fonctionement et de
maintenance, jointes à l'appareil.

11. PÉRIODES DE NON-UTILISATON

Durant les périodes de non-utilisation, la prise de courant ne
devrait pas être branchée à une source d'energie.

12. NETTOYAGE

Le matériel devrait être nettoyé en respectant les instructions
indiquées.

13. PENETRATION DES LIQUIDES

Un attention particulière est éxigée quant à la dispersion de
liquides tels que les produits de nettoyage et boissons, de façcon
à éviter toute pénetration dans l'enceinte du matériel.

14. DÉGÂT NÉCESSITANT UNE RÉVISION

Le matériel Hafler devrait être révisé par des personnes qualifées
de service après-vente, lorsque:

A. Les fiches ou la prise de courant ont été endommagé, ou:

B. De objets sont tombés sur le matériel, ou des liquides s'y sont

dispersés, ou:

C. Le matériel a été exposé à la pluie, ou:

7. EAU ET HUMIDITÉ

Le matériel ne devrait pas être utilisé près d'une source d'eau,
telle qu'une baignoire, un évier, ou une aire de baignade. De
plus, le matériel ne devrait pas être utilisé dans des lieux sujets
aux innondations, tels que les sous-sols.

8. SOURCES D'ÉNERGIE

Le matériel devrait seulement être relié à une source d'énergie de
même voltage et fréquence que celle indiquée sur le tableau
arrière, au dessus de la fiche d'entrée de la prise de courant.

9. PROTECTION DE LA PRISE DE COURANT

La prise de courant devrait être arrangée de façon à ne pas
interférer avec le déplacement d'objets (chariots, pales de
ventillateurs…etc.) ou de personnes à l'intérieur de la pièce.
D'autre part, il faudrait faire tres attention à ce que la prise ne soit
pas percée ou coupée, ou disposée de façon à risquer de l'être,
comme sous un tapis, autour d'un angle pointu…etc.

10. PRISE DE COURANT ÀTROIS FICHES

La prise de courant est composée de trois fiches, désignées à
réduire le risque de décharge électrique de l'appareil.

Elle devrait être de longueur suffisante pour la plupart des
utilisations de ce matériel. L'utilisation de rallonge t d'adaptateur
est déconsellée à moins dêtre en mesure de fournir la charge
électrique requise à un fonctionement sans risque, de tout
matériel relié.

D. Le matériel ne semble pas fonctioner correctement, ou

affiche un changement de performance, ou:

E. Le matériel a été renversé à terre, ou l'enceinte a été

endommagée.

15. REVISION

L'utilisateur ne devrait pas essayer de réviser le matériel en allant
plus loin que ce qui a été décrit dans le mode d'emploi. Toute
autre réviion devrait être confiée à un personnel qualifié.

16. CHARRIOTS ET MEUBLES

Le matériel devriat être utilisé avec des charriots et meubles de
qualité et stabilité suffisante à son utilisation préconçue.

L'ensemble du matériel et du charriot devrait être déplacé avec
précaution. Des mises en marche et arrêts brusques, des colli­sions excessives ainsi que des surfaces inégales peuvent renverser
l'ensemble du matériel et du charriot.

– iv –

ACHTUNG – WICHTIGE SICHERHEITS – INFORMATIONEN

ACHTUNG

DEUTSCH

Um die gefahr eines elektroschocks oder feuer zu

vermeiden, setzen sie das gerät keinem regen oder

1. INSTRUKTIONEN LESEN

Alle Sicherheits- und Operationshinweise Ihres Hafler Equipments
sollten vor der Inbetriebnahme gelesen werden.

2. BETRIEBSANLEITUNG AUFBEWAHREN

Bewahren Sie die Bedienungsanleitung sorgfältig auf, damit Sie in
dieser auch in Zukunft nachschlagen können.

3. WARNUNGEN BEACHTEN

Alle Warnungen des Gerätes und der Bedienungsanleitung sind
extrem wichtig und müssen befolgt werden.

4. INSTRUKTIONEN BEACHTEN

Alle Operations- und Gebrauchshinweise sind extrem wichtig und
müssen beachtet werden.

5. HITZE

Das Equipment sollte fern von Hitze ausstrahlenden Geräten
aufgestellt werden, wie z.B. Heizungen, Öfen etc.

6. VENTILATION

Das Equipment sollte so aufgestellt werden, daβ eine ausreichende
Ventialition gewährt wird.

7. WASSER UND FEUCHTIGKEIT

Das Equipment sollte nicht im oder in der Nähe von Wasser benutzt
werden, wie z.B. in Schwimmbädem, Saunen etc. Es sollte ebenfalls
nicht in Überschwämmungsgefährdeten Gebieten aufgestellt werden,
wie z.B. Kellerräumen.

8. STROMANSCHLUβ

Das Equipment darf nur an eine Stromversorgung angeschlossen
werden, die die gleichen Parameter aufweist, welche auf der
Rückseite, über em Anschluβterminal des Gerätes, aufgelistet sind.

GEFAHR EINES

ELEKTRISCHEN SCHLAGS

NICHT ÖFFNEN

WARNUNG:

extremer feuchtigkeitaus.

!

Der Blitz mit dem Pfeil, in einem gleihschenkligen Dreieck, soll den benutzer
vor unisolierter “gefährlicher Spannung” innerhalb des Gerätes warnen.

Das Ausrufezeichen, in einem gleichschenkligen Dreieck, soll den Benutzer
darauf aufmerksam machen, daβ dem Gerät wichtige Operations - und Service

- Informationen beigefügt sind.

11. ZEITRÄUME IN DENE DAS GERÄT NICHT GENUTZT WIRD

Wird das Gerät über einen längeren Zeitraum nicht genutzt (z.B.
Urlaub), ziehen Sie bitten den Netzstecker aus der Steckdose.

12. REINIGEN

Reinigen Sie das Gerät nur, wie in der Bedienungsanleitung detailliert
beschrieben.

13. EINDRINGEN VON FREMDKÖRPERN

Achten Sie darauf, daβ weder Fremdkörper, noch Flüssigkeiten in
das Gerät eindringen.

14. ERFORDERLICHER REPARATURSERVICE

Hafler Equipment sollte nur von qualifizierten Service-Technikern
instand gesetzt werden, wenn:

A. Das Stromversorgungskabel beschädigt wurde

B. Eine Flüssigkeit in das Gerät eingedrimgem ist

C. Das Gerät Regen ausgesetzt wurde

D. Das Gerät nicht mehr ordnungsgemäβ funktioniert, ggf. nicht

mehr die volle Leistung abgibt

E. Das Gerät runtergefallen ist oder das Gehäuse beschädigt
wurde

15. SERVICE

Der Benutzer sollte nur den Service ausführen, der in der
Bedienungsanleitung für den Benutzer freigegeben wird. Den
weiterführenden Service sollte nur von qualifizierten Tevhnikern
durchgeführt werden.

9. SCHUTZ DER ZULEITUNG

Die Zuletungen sollten so verlegt werden, daβ diese nicht in den
Bewegungsbereich anderer Möbelstücke oder Personen hereinragen.
Achten Sie darauf, das das Kabel nicht gequestscht oder
durchschnittren wird, wie z.B. unter Schränken oder an scharfen
Kanten etc.

10. MASSEANSCHLUβ

Das dreiadrige Anschlubkabel ist mit einem Erdungsleiter ausgestattet,
welcher die Risiken eines Elektroschocks verringert. Das Kabel hat
eine Länge, welche für die meisten Anwendungen völlig ausreicht.
Wenn Sie Verlängerungskabel benutzen, achten Sie darauf, das dies
die erforderlichen Ströme bertragen können. Benutzen Sie immer
dreiadrige Verlängerungskable.

16. AUFSTELLUNG

Das Equipment sollte so aufgestellt werden, daβ der gewählte
Untergrund die erforderliche Stabilität aufweist, so daβ eine
gefahrlose Bnutzong gewährleistet wird.

Das Equipment und der Untergrund sollte mit äuberster Vorsicht
bewegt werden. Bei schnellen Bewegungen oder starkem
Abbremsen, kann es zum Umkippen des Equipments kommen.

– v –

NOTARE – IMPORTANTI INFORMAZIONI SULLA SICUREZZA

Il simbolo del fulmine in un triangolo equilatero vuole avvertire della presenza

ATTENZIONE

ITALIANO

Per prevenire incendio scariche elettriche, non esporre

questo apparato a pioggia o umiditá.

RISCHIO DI SCARICHE

ELETTRICHE NON APRIRE

ATTENZIONE:

!

di tensioni elevate non isolate e di valore sufficiente per costituire rischio di
shock elettrico alle persone.

Il punto esclamativo contentuto in un triangolo equilatero vuole avvertire
l'utente della presenza di parti di servizio e di manutenzione che sono
dettagliate nel manuale di istruzioni.

1. LEGGETE LE ISTRUZIONI

Tutte le istruzioni riguardanti la sicurezza ed il funzionamento
devono essere lette prima di applicare tensione all'apparato.

2. CONSERVATE IL MANUALE

Queste istruzioni riguardanti la sicurezza ed il funzionamento
devono essere conservate come riferimento futuro.

3. AVVERTENZE

Tutte le avvertenze poste sull'apparato e sul libretto di istruzioni
sono importanti e devono essere seguite.

4. SEGUIRE LE ISTRUZIONI

Tuttle le istruzioni operative e di funzionamento devono essere
seguite.

5. TEMPERATURA

L'apparato deve essere mantenuto lontano da tuttle le zone ad alta
temperature, termosifoni, termoconvettori, stufe e forni, caminetti
ed altro.

6. VENTILAZIONE

L'apparato deve essere posizionato in aree convenienti per una
corretta ventilazione. Prestare attenzione che sia consentita
circolazione d'aria attorno e dentro il cabinet.

7. ACQUA E POLVERE

L'apparato deve essere posizionato lontano da zone contenenti
acqua, come vasche a bagno, acquari e piscine. Inoltre non deve
essere impiegato in aree soggette ad allagamento, come le cantine.

8. REQUISITI DI ALIMENTAZIONE

L'apparato deve essere connesso solo ad un'alimentazione della
stessa tensione e frequenza di quanto scritto sulla parte posteriore
del telaio.

9. PROTEZIONE DEL CAVO DI ALIMENTAZIONE

Il cavo di alimentazione deve essere posizionato in modo di non
interferire con il movimento di oggetti nella stanza: persone,
ventilatori, carrelli, ecc…prestate attenzione anche che il cavo non
sia tagliato o spellato e che non possa tagliarsi e spellarsi.

11. PERIODI DI NON UTILIZZO

Durante lunghi periodi di non utilizzo, staccare il cavo di
alimentazione.

12. PULIZIA

L'apparato deve essere pulito solo come indicato dalle istruzioni.

13. INGRESSO DI OGGETTI E LIQUIDI

Si deve prestar attenzione che oggetti e liquidi, come fluidi detergenti
e bibite, non vengano versati all'interno dell'apparato.

14. RIPARAZIONI

Gli apparati Hafler devono essere riparati da personale qualificato
quando:

A. Il cavo di alimentazione o la spina sono danneggiati

B. Oggetti sono caduti all'interno del telaio o quando del
liquido è entrato

C. Quando l'apparato è stato esposto a pioggia

D. Quando l'apparato non sempra funzionare normalmente o
quando esibisce un cambiamento di prestazioni o

E. Quando è caduto o il telaio è stato danneggiato

15. ASSISTENZA

L'utente non deve tentare di prestare assistenza all'apparato, se non
per quanto esposto nelle istruzioni. Tutti gli altri interventi devono
essere effettuati da un tecnico specializzato.

16. CARRELLI E STAND

L'apparato deve essere impiegato su carrelli o stand solo se questi
sono sufficientemente solidi e stabili per la funzione a cui si vuole
dedicarli.

La combinazione di carrello ed apparato deve essere mossa con
cautela. Fermate e partenze improvvise, forze eccessiva e superfici
irregolari, possono ribaltare la cominzione carrello e apparato.

10. MESSA A TERRA

Il cavo di alimentazione è del tipo a tre fili con terra ed è progettato
pr ridurre il rischio di shock elettrici. Si presume che sia della
lunghezza sufficiente per la maggior parte degli impieghi. L'impiego
di prolunghe e adattatori è sconsigliato se questi non garantiscono
la potenza sufficiente per i corretto fuinzionamento degli apparati
connessi. E altersì importante che vengano sempre impiegate
prolunghe con la configurazaione a tre fili con terra.

– vi –␣

T ABLE OF CONTENTS

PERFORMANCE SPECIFICATIONS .......................................................................................................................... i

Frequency Response Graph
Energy Time Curve Graph
Horizontal Polar Response Graph
Dimensions

SAFETY PRECAUTIONS .......................................................................................................................................... ii

INTRODUCTION ................................................................................................................................................... 1

TECHNICAL DESIGN FEATURES ............................................................................................................................ 1

FRONT & REAR PANEL VIEWS............................................................................................................................... 4

INSTALLATION

Location ........................................................................................................................................................... 5

Determining Acoustic Center............................................................................................................................ 6

Input Switch ..................................................................................................................................................... 6

XLR Wiring Configurations ............................................................................................................................... 6

SCHEMATIC DIAGRAMS

Schematic Diagram .......................................................................................................................................... 7

PC Board Layout............................................................................................................................................. 11

OPERATION

Input Sensitivity .............................................................................................................................................. 12

Bass Roll Off................................................................................................................................................... 12

Bass Shelving .................................................................................................................................................. 13

Treble Shelving............................................................................................................................................... 13

AC Line .......................................................................................................................................................... 14

Power Switch ................................................................................................................................................. 14

Status LED ...................................................................................................................................................... 15

Rubber Pad..................................................................................................................................................... 15

Break-In and Warm-Up .................................................................................................................................. 15

Cleaning and Maintenance ............................................................................................................................. 15

SERVICE REFERENCE

Parts List ......................................................................................................................................................... 16

Functional Block Diagram .............................................................................................................................. 19

Circuit Operation ........................................................................................................................................... 20

Calibration ..................................................................................................................................................... 20

Input Circuit ................................................................................................................................................... 21

Tweeter Crossover .......................................................................................................................................... 21

Woofer Crossover ........................................................................................................................................... 22

Thermal Protection ......................................................................................................................................... 22

Clipping Indicator ........................................................................................................................................... 23

On Indicator ................................................................................................................................................... 23

Tweeter Replacement ..................................................................................................................................... 24

Woofer Replacement ...................................................................................................................................... 24

Amplifier Replacement ................................................................................................................................... 25

Transformer Replacement ............................................................................................................................... 25

WARRANTY ......................................................................................................................................................... 26

INTRODUCTION

Thank You and congratulations on your purchase of the HAFLER TRM6 reference monitor, the world's finest brand
in professional audio equipment.

The TRM6 (Trans•ana Reference Monitor) is a bi-amplified, two-way near field monitor offering unmatched
quality and performance in a truly professional grade product. The TRM6 is great for Professional Studios, Digital
Work Stations, Broadcast Booths, and Home Project Studios.

Although we realize a professional such as yourself already knows a thing or two about pro audio, we urge you to
read this manual to at least humor our technical writer. For ease of use, this manual is organized into three main
sections: Installation, Operation, and Service Reference. “Installation” covers the set-up of your new HAFLER
equipment in the system. “Operation” covers the controls and how to use them for optimum performance.
“Service Reference” contains field service information useful for technicians and engineers.

TECHNICAL DESIGN FEATURES

The TRM6 amplifiers utilize our trans•ana circuit topology employing MOSFETs in the output stage resulting in
superior sound quality.

An active 4th order Linkwitz-Riley crossover sends frequencies above 3.2kHz to a 35 watt amplifier driving
a proprietary wave guide tweeter, and frequencies below 3.2kHz to a 50 watt amplifier driving an 6"
transducer. The high frequency channel features up to ±4dB of Treble shelving, while the low frequency channel
features up to ±4dB of Bass shelving. In addition, the low frequency channel includes an active 2nd order
subsonic filter selectable to limit harmful frequencies below 30Hz or 60Hz. Monitoring
the status of both channels is done with an LED indicating Power On, Clipping and Thermal.

The high frequency transducer is a Ferrofluid cooled 1" (25mm) soft dome hemispherical tweeter utilizing a rigid
but lightweight silk diaphragm. A Phase Lens and axis-symmetric exponential waveguide improve the transition
of soundwaves from planar to spherical which result in excellent high frequency dispersion and coherent on-axis
frequency response. The low frequency transducer is a proprietary 6.5" (165mm) steel basket woofer utilizing a
20 mil polypropylene cone with a 20 mil dust cap. The suspension consists of a nitrile rubber surround and an
extended collar flat spider. The motor is constructed from a 1.25" diameter voice coil on an anodized aluminum
former with an extended vented pole piece. The 33 oz. ferrite magnet is magnetically shielded to suppress stray
leakage flux to only 4"...well within the confines of the monitor's walls, making it great for use near CRT monitors.

The cabinet is made from acoustically dead 19mm MDF, internally lined with damping material,
and features a rear firing radiused Aerovent for reduced turbulence. The outside features
a semi-gloss finish and includes a rubber pad on the underside to control vibration.

– 1 –

Amplifier

MEHSA

®

(Maximum Efficiency HeatSink Application) MEHSA is a proprietary process that yields up to 5 times better
heat transfer than traditional FET mounting techniques using the exact same components. A multi-layer
insulated metal substrate operating with minimal thermal resistance spreads heat both downward and
outward to quickly dissipate heat from each device across the heatsink. This process combined with our DSM
technology and MOSFET devices allow us to squeeze more watts per cubic inch from every output device as
well as provide consistent thermal stability.

The Way The Old Way

THE RESULT: Better reliability through faster heat dissipation.

Heat Monster:

High output MOSFET device

Copper heat spreader

Dielectric layer

Base Layer - aluminum

Thermal grease

Screw, no pressure on component!

Heat sink

Multiple heat paths

Solder

PC Board

Clamp Bar

Heat generating component

(typically a power MOSFET or

bipolar semiconductor)

Thermal grease

Thermal grease

Heat sink

Heat path

Mica

Screw

PC Board

Trans•ana

®

Trans•ana (TRANSconductance Active Nodal Amplifier) is a circuit that allows the audio signal to pass
through the amplifier at low voltage. The signal is directly level-shifted to the fixed high voltage rails via a
pair of driver transistors. Signal linearity is assured by an active node formed by the driver transistors at
ultrasonic frequencies. This allows amplifier performance similar to Trans•nova which is highly stable and
linear while utilizing the advantages of a non-floating power supply.

THE RESULT: An extended frequency band width accurately supplied to the output stages of the amplifier.

MOSFET Devices

®

HAFLER is one of the few manufacturers in the sound community to utilize MOSFET devices in both the
power supply and output stages. MOSFET (Metal Oxide Semiconductor Field Effect Transistor) devices offer
several important inherent advantages over the 30 year old technology of bi-polar design. These advantages
include: thermal stability, fast switching speed, ultra low output impedance and wide bandwidth linearity.
In addition, MOSFETs operate very similarly to vacuum tubes in that they are more linear than bipolar
transistors. However, MOSFETs can deliver the midrange clarity without the limitations of transient response
and high frequency phase shifting normally associated with tube operation.

THE RESULT: Thermal stability, fast switching speed, ultra low output impedance and wide bandwidth
linearity.

– 2 –

Tweeter

®

Woofer

®

Wave Guide

The wave guide is a proprietary axis-symmetrical form of horn mounted to the tweeter to increase efficiency.
The wave guide improves the transition of sound waves (from planar to spherical) smoothly from the throat
of the wave guide to the mouth. The unique shape and smooth surfaces improve the tweeter's off-axis
frequency response as well as provide coherent on-axis response.

THE RESULT: Improves dispersion for a wider “sweet spot.”

Shielded Magnet

A shielded magnet is used to reduce the radiation of high-strength magnetic fields from the woofer's motor
assembly. Suppression is accomplished by attaching a “bucking” magnet to the motor assembly in order to

keep stray leakage flux within the monitor cabinet. This type of
shielding prevents color and image distortion when placing the woofer
in close proximity to direct view (CRT) television receivers and com­puter monitors.

Cabinet

®

THE RESULT: Prevents distortion in TV and computer monitors.

Phase Coherent

Each monitor is Phase Coherent in order to assure proper arrival times of all frequencies in the near field
environment. This is accomplished by aligning both transducer's voice coils on a common ZDP (Zero Delay
Plane) axis. The cabinet baffle positions the woofer forward and the waveguide displaces the tweeter back
with an additional 39µs delay in the high frequency amplifier to precisely “tweak” the tweeter onto its ZDP
axis. This allows the acoustic center, located midway between the high and low frequency transducers, to
coherently deliver a flat frequency and phase response around the crossover point.

THE RESULT: Delivers a flat frequency and phase response.

– 3 –

ON

1234

ON

1234

ON

1234

ON

1234

A Division of Rockford Corp.

Tempe, AZ 85281 U.S.A.

Made in the U.S.A.

®

XLR Connections

3

21

+

–

5kHz 20kHz

Sensitivity

dBU input required for 100dB SPL@ 1m

SELECT ONE

0dB

0dB

30Hz

dB

+4

+2

0

–2

–4

200Hz

+4dBu

XLR

Balanced

Signal In

Trans•

ana

Reference Monitor - TRM6

250V T3A

115 V~

60 HZ

WARNING: DO NOT REMOVE COVER

TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK

DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE.

!

RISK OF ELECTRIC SHOCK

DO NOT OPEN

+4

+2

0

–2

–4

dB

Bass Shelving

SELECT ONE

Treble Shelving

SELECT ONE

RCA

- Unbal

- +1dBu

- -2dBu

- -5dBu

- -8dBu

- -11dBu

- 30Hz

- 60Hz

- +4dB

- +2dB

- -2dB

- -4dB

- +4dB

- +2dB

- -2dB

- -4dB

Bass Roll Off

SELECT 30Hz

OR 60Hz

30Hz 60Hz

140W

Max

CAUTION

Rear Panel View

Unbalanced

Balanced

Input

Input

Input Switch

Sensitivity

Bass Roll Off

Bass

Shelving

Treble

Shelving

Heatsink

AC Line

Input

AC Line

Fuse

Front Panel View

Power

Switch

Tweeter

Status LED

Wave Guide

– 4 –

Woofer

Rubber Pad

I NSTALLATION

LOCATION

The location of your reference monitors in addition to the acoustics of the listening room will influence the system
frequency response. In the near field environment, our ears are more sensitive to direct sound rather than the
reverberation of sound. Below are some recommendations for the initial set-up which may help you optimize
performance in complex acoustic environments. In any configuration, keep the rear of the monitor at least 5" (12.7cm)

away from any wall or obstruction to reduce excessive boundary “loading” of the woofer vent and to optimize heat
sink cooling.

Fig. 1

Aiming the monitors directly forward (Fig. 1) may cause response problems resulting in inadequate stereo imaging.
Aiming the monitors toward you and spaced equally like a triangle (Fig. 2) provides the best imaging and produces the
flattest frequency response.

Fig. 3

INADEQUATE

Off-Axis Response

INADEQUATE

Horizontal Alignment

Fig. 2

Fig. 4

OPTIMUM

On-Axis Response

OPTIMUM

Vertical Alignment

If you frequently move your chair from side to side in front of your mixing console, positioning the tweeter and woofer
in horizontal alignment (Fig. 3) can create complex lobing patterns. Minimizing this effect can be achieved by placing
the tweeter and woofer in vertical alignment (Fig. 4). If it is essential to position the monitors horizontally, place them
with the tweeters toward the inside.

– 5 –

DETERMINING ACOUSTIC CENTER

3-4 ft.

Max. listening level

Acoustic
Center

Min. listening level

+4dBu

XLR

Balanced

RCA
Unbal

- +1dBu

- -2dBu

- -5dBu

ON

1234

Finding the “Acoustic Center” is accomplished by positioning the
monitors so coherent arrival of the transducers occurs at ear level. The
Acoustic Center is located 3 to 4 feet in front of the monitor, measuring
perpendicularly from the center point of the cabinet (midway between
the woofer and tweeter). Our tests have shown that a flat phase and
frequency response occurs just above and below the Acoustic Center
with the minimum and maximum height spanning between the
tweeter dome and woofer dust cap.

INPUT SWITCH

The unbalanced input uses a conventional RCA phone jack. Move the input switch ON (-->) to use this jack. The
balanced input jack is an XLR plug. The XLR jack is connected according to the IEC and AES standard. Move the input
switch OFF (<--) to use this jack.

Unbalanced Input

Move input switch
RIGHT (-->) to use
RCA connector

XLR

Balanced

+4dBu

RCA
Unbal

- +1dBu

- -2dBu

1234

- -5dBu

ON

Balanced Input

Move input switch
LEFT (<--) to use
XLR connector

XLR WIRING CONFIGURATIONS

Using the balanced XLR input is recommended for installations where long cable runs are used or when the potential
for stray electromagnetic fields from other wires exists. There is a balanced and unbalanced method in which the XLR
inputs can be used. The first method is an XLR Balanced Input using 3-conductor cable. The balanced signals carried
on pins 2 and 3 are equal in amplitude and opposite in phase. Pin 1 is the ground and shield. In this configuration,
noise common on both phases of signal are effectively "canceled" out. The second method is an XLR Unbalanced Input
using 2-conductor cable with the signal carried in the center conductor and the ground carried on the shield. Many
popular mixers use unbalanced outputs and can be used with the XLR balanced input. However, in this type of
configuration we recommend using twisted pair cable or short cable length to prevent residual ground noise.

XLR Balanced Input

Check output from source for proper signal polarity

Connect (–) and GND (shield) terminals at

XLR Unbalanced Input

both ends

prevent unstable amplifier operation

of cable to

INPUT FROM

Pin 1 = GND
Pin 2 = (+)
Pin 3 = (–)

1

2

GND

–

3

+

SOURCE

– 6 –

Pin 1 = GND
Pin 2 = (+)
Pin 3 = GND

INPUT FROM

SOURCE

1

3

2

SHIELD

+

SCHEMATIC DIAGRAM

NOTES: Unless specified otherwise

1. All resistors in ohms.

2. All capacitors in microfarads.

3. Channel 1 only shown.

– 7 –

!

Qualified Service Personnel Only

–8–

SCHEMATIC DIAGRAM

NOTES: Unless specified otherwise

1. All resistors in ohms.

2. All capacitors in microfarads.

3. Channel 1 only shown.

Removable Center Spread

!

Qualified Service Personnel Only

Removable Center Spread

SCHEMATIC DIAGRAM

!

Qualified Service Personnel Only

NOTES: Unless specified otherwise

1. All resistors in ohms.

2. All capacitors in microfarads.

3. Channel 1 only shown.

-11-

PC BOARD LAYOUT

!

Qualified Service Personnel Only

– 12 –

OPERATION

NOTE: When using the INPUT SENSITIVITY, select only one switch configuration at a time. Engaging
multiple switch configurations (i.e., moving two or more switches ON) may cause undesirable operation and
is NOT RECOMMENDED.

INPUT SENSITIVITY

The Input Sensitivity adjustment is used to match the monitor with signal levels from a variety of mixing consoles.
The Input Sensitivity uses DIP switches to match input levels over a 15dB range and are marked +1dB, –2dB, –5dB,
–8dB, and –11dB. These numbers indicate the input in dBu required to produce an output of 100dB SPL @ 1 meter.
When all switches are in the OFF (left) position, the monitor is matched to +4dB input level. In the +4dB switch
setting, the monitor is less sensitive to the input signal. In the –11dB switch setting, the monitor is more sensitive
to the input signal.

I

N

P

U

T

+4dBu

1234

ON

1234

ON

- +1dBu

- -2dBu

- -5dBu

- -8dBu

- -11dBu

+4dBu

1234

ON

1234

ON

- +1dBu

- -2dBu

- -5dBu

- -8dBu

- -11dBu

+4dBu

1234

ON

1234

ON

- +1dBu

- -2dBu

- -5dBu

- -8dBu

- -11dBu

+4dBu

1234

ON

1234

ON

- +1dBu

- -2dBu

- -5dBu

- -8dBu

- -11dBu

+4dBu

1234

ON

1234

ON

- +1dBu

- -2dBu

- -5dBu

- -8dBu

- -11dBu

+4dBu

1234

ON

1234

ON

- +1dBu

- -2dBu

- -5dBu

- -8dBu

- -11dBu

+4dB Input +1dB Input –2dB Input –5dB Input –8dB Input

–11dB Input

NOTE: When using the Bass Roll Off, select only the 30Hz or 60Hz filter. Engaging both switch configura­tions at one time (both switches ON) may cause undesirable operation and is NOT RECOMMENDED.

BASS ROLL OFF

The Bass Roll Off is a subsonic filter used to limit harmful frequencies sent to the low frequency transducer to
prevent overexcursion. The filter is selectable to electronically limit frequencies below 30Hz or 60 Hz at a 12
dB/octave roll off. When both switches are in the OFF (left) position, the amplifier has an electrical -3dB
down point of 28Hz. For optimum operation select only one switch configuration at a time.

Bass Roll Off

SELECT 30Hz

OR 60Hz

30Hz 60Hz

- 30Hz

1234

- 60Hz

ON

Bass Roll Off

SELECT 30Hz

OR 60Hz

30Hz 60Hz

- 30Hz

1234

- 60Hz

ON

30Hz Subsonic Filter 60Hz Subsonic Filter

– 13 –

NOTE: When using the BASS SHELVING & TREBLE SHELVING, select only one switch configuration at a
time. Engaging multiple switch configurations (i.e., moving two or more switches ON) may cause undesirable
operation and is NOT RECOMMENDED.

BASS SHELVING

Bass Shelving is used to match the low frequency response of the monitor to the acoustic environment. Bass
Shelving uses DIP switches to control frequencies from 40Hz to 200Hz over an 8dB range and are marked +4dB,
+2dB, –2dB, and –4dB. When all switches are in the OFF (left) position, the bass level is at 0dB.

0dB

40Hz

+4
+2

0
–2
–4

1234

ON

200Hz

- +4dB

- +2dB

- -2dB

- -4dB

dB

0dB

40Hz

+4
+2

–2
–4

+2dB 0dB+4dB

0

200Hz

1234

ON

- +4dB

- +2dB

- -2dB

- -4dB

dB

0dB

40Hz

+4
+2

0
–2
–4

ON

200Hz

- +4dB

- +2dB

- -2dB

1234

- -4dB

dB

0dB

40Hz

+4
+2

0
–2
–4

ON

–2dB

200Hz

- +4dB

- +2dB

- -2dB

1234

- -4dB

dB

0dB

40Hz

+4
+2

0
–2
–4

ON

–4dB

200Hz

- +4dB

- +2dB

- -2dB

1234

- -4dB

TREBLE SHELVING

Treble Shelving uses DIP switches to control frequencies from 5kHz to 20kHz over an 8dB range and are marked
+4dB, +2dB, –2dB, and –4dB. When all switches are in the OFF (left) position, the treble level is at 0dB.

+4
+2

–2
–4

+4
+2

–2

0

dB

0

dB

–4

+4
+2

–2
–4

+4
+2

0

dB

–2

0

dB

–4

+4
+2

0
–2
–4

dB

dB

0dB

5kHz

+4dB

20kHz

- +4dB

- +2dB

- -2dB

1234

- -4dB

ON

0dB

5kHz

+2dB

20kHz

1234

ON

AC LINE

The TRM6 operates from a 115 VAC/60Hz power line. The TRM6 CE operates from a 230 VAC 50/60Hz power line.
Connection is made by a 16 gauge, IEC Type 320, grounded line cord. For safety considerations only a properly
grounded (earthed) receptacle should be used. If a grounded circuit is not available, do not break off the ground pin;
use the proper adapter plug for a two wire receptacle with the grounding plug suitably connected to earth ground.

!

IMPORTANT: The power line fuse is mounted on the rear panel. If this fuse blows, replace it only
with the same type and rating as indicated in the parts list.

- +4dB

- +2dB

- -2dB

- -4dB

0dB

5kHz

0dB

– 14 –

20kHz

- +4dB

- +2dB

- -2dB

1234

- -4dB

ON

0dB

5kHz

20kHz

- +4dB

- +2dB

- -2dB

1234

- -4dB

ON

0dB

–2dB –4dB

5kHz

20kHz

- +4dB

- +2dB

- -2dB

1234

- -4dB

ON

POWER SWITCH

The POWER switch is located on the front panel. The LED will illuminate GREEN, indicating the respective
amplifiers are on. It is possible to leave the power switch in the ON position and switch the monitor remotely
through a power distribution block or switched outlet. When doing so, make sure the switch is rated for the current
required by the monitor.

Standard practice is to turn the amplifier on last and off first when switching components to prevent

!

sending damaging transients to the speakers.
Es costumbre encender el amplificador de último y apagarlo de primero cuando se estan encendiendo/

!

apagando otros equipos, para así evitar el envío de transientes dañinas a los parlantes.
Il est de pratique courante de commencer par tourner l'amplificateur sur “off” et de terminer par “on,”

!

lorsqu'il s'agit de prévenir l'envoie de passages nuisible aux haut-parleurs.
Der Verstärker sollte als letztes Gerät eingeschaltet und als erstes Gerät wieder ausgeschaltet werden,

!

um eine Beschädigung der Lautsprecher durch spannungsspitzen zu vermeiden.
L'uso comune consiglia l'accensione dell'amplificatore per ultimo e lo spegnimento per primo quando

!

si accendono i vari componenti, per evitare l'invio di transitori danneggianti agli altoparlanti.

STATUS LED

Amplifier operation is monitored internally and has a status LED. This indicator can be used for system
troubleshooting in case of aberrant behavior.

LED – Monitors the status of the amplifiers.

COLOR STATUS

GREEN Power on*

FLASHING RED Clipping

RED Thermal

*Indicates the amplifier is on regardless of input signal

RUBBER PAD

A large rubber pad is supplied to eliminate annoying buzzes and rattles when placing the monitors on mixing
consoles or similar mounting surfaces. Attach the pad to the underside of the monitor in the following manner:

• Thoroughly clean area where pad will be positioned (i.e., with isopropyl alcohol)

• Remove paper liner from rubber pad (avoid touching adhesive with fingers)

• Position pad in desired location

• Press pad firmly to insure good contact

BREAK-IN and WARM-UP

We recommend initially breaking in the woofer for approximately 8 hours with musical information to establish
the monitor's natural bass response. To achieve the best sonic performance and image stability from the internal
amplifiers, we recommend letting them warm up for 1 hour before beginning any critical listening.

CLEANING & MAINTENANCE

There is no requirement for regular maintenance on the electronic components of the monitor. If the cabinet or
woofer becomes soiled, it can be cleaned using a damp, soft cloth. If the monitor is located in a particularly dusty
environment, cleaning the inside with compressed air or vacuuming every 18 to 24 months is sufficient.

– 15 –

P ARTS LIST

DESIGNATOR VALUE PART #

ALL RESISTORS IN OHMS

R1 RES 1.0K OHM 1/10W 1% RM/10-1001B
R10 RES 47K OHM 1/10W 5% RM/10-473B
R102 RES 6.8K OHM 1/4W 5% RM/4-682C
R103 RES 6.8K OHM 1/4W 5% RM/4-682C
R104 POT 5K 10% PIHER RV-502Q
R105 RES 1.0K OHM 1/10W 1% RM/10-1001B
R106 35.7K OHM 1/10 WATT 1% RM/10-3572B
R107 35.7K OHM 1/10 WATT 1% RM/10-3572B
R108 35.7K OHM 1/10 WATT 1% RM/10-3572B
R109 RES 14K OHM 1/10W 1% RM/10-1402B
R11 POT 2K TRIM RV-202
R110 RES 14K OHM 1/10W 1% RM/10-1402B
R111 RES 14K OHM 1/10W 1% RM/10-1402B
R112 RES 13K OHM 1/10W 5% RM/10-133B
R113 RES 300 OHM 1/10W 5% RM/10-301B
R114 RES 620 OHM 1/10W 5% RM/10-621B
R115 RES 10 OHM 1/10W 5% RM/10-100B
R116 RES 620 OHM 1/10W 5% RM/10-621B
R117 RES 100 OHM 1/4W 5% RM/4-101C
R118 RES 2.0K OHM 1/10W 1% RM/10-2001B
R119 RES 1.0K OHM 1/10W 1% RM/10-1001B
R12 RES 10K OHM 1/10W 5% RM/10-103B
R120 RES 9.76K OHM 1/10W 1% RM/10-9761B
R121 RES 280 OHM 1/10W 1% RM/10-2800B
R122 RES 10 OHM 1/10W 5% RM/10-100B
R123 RES 100 OHM 1/4W 5% RM/4-101C
R124 RES 510 OHM 1/10W 5% RM/10-511B
R125 RES 510 OHM 1/10W 5% RM/10-511B
R128 RES 7.15K OHM 1/10W 1% RM/10-7151B
R129 RES 7.15K OHM 1/10W 1% RM/10-7151B
R13 RES 47K OHM 1/10W 5% RM/10-473B
R130 RES 976K OHM 1/10W 1% RM/10-9763B
R131 RES 20.0K OHM 1/10W 1% RM/10-2002B
R132 RES 20 OHM 1/10W 5% RM/10-200B
R133 RES 2.0K OHM 1/10W 1% RM/10-2001B
R134 RES 20.0K OHM 1/10W 1% RM/10-2002B
R135 RES 22K OHM 1/10W 5% RM/10-223B
R136 POT 5K 10% RV-502Q
R137 RES 1.0K OHM 1/10W 1% RM/10-1001B
R138 RES 20 OHM 1/10W 5% RM/10-200B
R139 RES 20 OHM 1/10W 5% RM/10-200B
R14 RES 10K OHM 1/10W 5% RM/10-103B
R140 RES 2.0K OHM 1/10W 1% RM/10-2001B
R141 RES 20 OHM 1/10W 5% RM/10-200B
R142 RES 10 OHM 1W RM1-100-012
R143 RES 1.0K OHM 1/10W 1% RM/10-1001B
R144 RES 1.07K OHM 1/10W 1% RM/10-1071B
R145 RES 3.92K OHM 1/4W 1% RMP/4-3921-03
R146 RES 2.2M OHM 1/10W 5% RM/10-225B
R147 RES 3.92K OHM 1/4W 1% RM/4-3921C
R148 RES 1.0K OHM 1/10W 1% RM/10-1001B
R15 RES 3.3M OHM 1/10W 5% RM/10-335B
R150 RES 100 OHM 1/10W 5% RM/10-101B
R151 RES 100 OHM 1/10W 5% RM/10-101B
R154 RES 1.5K OHM 1/10W 5% RM/10-152B
R156 RES 1.0K OHM 1/10W 1% RM/10-1001B
R16 RES 4.7K OHM 1/10W 5% RM/10-472B
R163 RES 16.2K 1/10 1% RM/10-1622B
R164 RES 191K OHM 1/10W 1% RM/10-1913B
R165 RES 0 OHM 1/10W RM/10-000B
R166 RES 9.09KOHM 1/10W 1% RM/10-9091B
R167 RES 6.49K OHM 1/10W 1% RM/10-6491B
R169 RES 2.0K OHM 1/10W 1% RM/10-2001B
R17 RES 10K OHM 1/10W 5% RM/10-103B
R170 RES 9.76K OHM 1/10W 1% RM/10-9761B
R171 RES 2.0K OHM 1/10W 1% RM/10-2001B
R172 RES 2.0K OHM 1/10W 1% RM/10-2001B
R173 RES 2.21K OHM 1/10W 1% RM/10-2211B
R174 RES 1.33K OHM 1/4W 1% RM/4-1331C

R175 35.7K OHM 1/10 WATT 1% RM/10-3572B
R176 RES 909 OHM 1/10W 1% RM/10-9090B
R177 35.7K OHM 1/10 WATT 1% RM/10-3572B
R178 30.1K RES 1% 0805 RM/10-3012B
R179 RES 2.0K OHM 1/10W 1% RM/10-2001B
R18 RES 100K OHM 1/10W 5% RM/10-104B
R180 RES 20 OHM 1/10W 5% RM/10-200B
R181 RES 20 OHM 1/10W 5% RM/10-200B
R182 RES 20 OHM 1/10W 5% RM/10-200B
R183 RES 20 OHM 1/10W 5% RM/10-200B
R184 RES 10 OHM 1W RM1-100-012
R19 RES 604K OHM 1/10W 1% RM/10-6043B
R2 RES 1.0K OHM 1/10W 1% RM/10-1001B
R20 RES 100K OHM 1/10W 5% RM/10-104B
R21 RES 2.2M OHM 1/10W 5% RM/10-225B
R22 RES 100K OHM 1/10W 5% RM/10-104B
R23 RES 100K OHM 1/10W 5% RM/10-104B
R24 RES 10K OHM 1/10W 5% RM/10-103B
R25 RES 2.0K OHM 1/10W 1% RM/10-2001B
R26 RES 1M OHM 1/10W 5% RM/10-105B
R27 RES 1.3K OHM 1/10W 5% RM/10-132B
R278 RES 510 OHM 1/10W 5% RM/10-511B
R279 RES 510 OHM 1/10W 5% RM/10-511B
R28 RES 1.3K OHM 1/10W 5% RM/10-132B
R29 RES 121 OHM 1/4W 1% RM/4-1210C
R3 RES 1.0K OHM 1/10W 1% RM/10-1001B
R30 RES 121 OHM 1/4W 1% RM/4-1210C
R31 RES 220 OHM 1/10W 5% RM/10-221B
R32 RES 10 OHM 1/10W 5% RM/10-100B
R33 RES 300 OHM 1/10W 5% RM/10-301B
R34 RES 300 OHM 1/10W 5% RM/10-301B
R35 RES 2.0K OHM 1/10W 1% RM/10-2001B
R36 RES 3.3M OHM 1/10W 5% RM/10-335B
R37 RES 10 OHM 1/10W 5% RM/10-100B
R38 RES 300 OHM 1/10W 5% RM/10-301B
R39 RES 300 OHM 1/10W 5% RM/10-301B
R4 RES 47K OHM 1/10W 5% RM/10-473B
R40 RES 2.0K OHM 1/10W 1% RM/10-2001B
R41 RES 620 OHM 1/10W 5% RM/10-621B
R42 RES 300 OHM 1/10W 5% RM/10-301B
R43 RES 1.0K OHM 1/10W 1% RM/10-1001B
R44 24.9K OHM RES. 1/10 W 1% RM/10-2492B
R45 RES 1.0K OHM 1/10W 1% RM/10-1001B
R46 RES 3.92K OHM 1/4W 1% RMP/4-3921-03
R47 RES 2.2M OHM 1/10W 5% RM/10-225B
R48 RES 3.92K OHM 1/4W 1% RM/4-3921C
R49 RES 604K OHM 1/10W 1% RM/10-6043B
R5 RES 1.0K OHM 1/10W 1% RM/10-1001B
R50 RES 4.7K OHM 1/10W 5% RM/10-472B
R51 RES 15K OHM 1/10W 5% RM/10-153B
R52 RES 1.0K OHM 1/10W 1% RM/10-1001B
R53 RES 2.2M OHM 1/10W 5% RM/10-225B
R54 RES 300 OHM 1/10W 5% RM/10-301B
R55 RES 100 OHM 1/10W 5% RM/10-101B
R56 RES 15K OHM 1/10W 5% RM/10-153B
R57 RES 10K OHM 1/10W 5% RM/10-103B
R58 200 TRIM POT RVH-201
R59 35.7K OHM 1/10 WATT 1% RM/10-3572B
R6 RES 1.0K OHM 1/10W 1% RM/10-1001B
R60 RES 100 OHM 1/10W 5% RM/10-101B
R61 RES 10K OHM 1/10W 5% RM/10-103B
R62 RES 2.2M OHM 1/10W 5% RM/10-225B
R63 RES 470 OHM 1/10W 5% RM/10-471B
R64 RES 300 OHM 1/10W 5% RM/10-301B
R65 RES 1.5K OHM 1/10W 5% RM/10-152B
R66 RES 620 OHM 1/10W 5% RM/10-621B
R67 RES 1.0K OHM 1/10W 1% RM/10-1001B
R68 RES 100 OHM 1/4W 5% RM/4-101C
R69 RES 2.0K OHM 1/10W 1% RM/10-2001B
R7 RES 1.0K OHM 1/10W 1% RM/10-1001B
R70 RES 280 OHM 1/10W 1% RM/10-2800B
R71 RES 10 OHM 1/10W 5% RM/10-100B

– 16 –

R72 RES 100 OHM 1/4W 5% RM/4-101C
R73 RES 2.21K OHM 1/10W 1% RM/10-2211B
R74 RES 2.21K OHM 1/10W 1% RM/10-2211B
R75 RES 100K OHM 1/10W 5% RM/10-104B
R76 619K OHM 1/10W 1% RM/10-6193B
R78 RES 1M OHM 1/10W 5% RM/10-105B
R79 RES 1M OHM 1/10W 5% RM/10-105B
R8 POT 2K TRIM RV-202
R80 RES 6.49K OHM 1/10W 1% RM/10-6491B
R81 RES 6.49K OHM 1/10W 1% RM/10-6491B
R82 46.4K OHM RES. 1/10 W 1% RM/10-4642B
R84 RES 120 OHM 1/10W 5% RM/10-121B
R85 46.4K OHM RES. 1/10 W 1% RM/10-4642B
R86 RES 5.49K OHM 1/10W 1% RM/10-5491B
R87 RES 1.62K OHM 1/4W 1% RM/4-1621C
R88 RES 2.0K OHM 1/10W 1% RM/10-2001B
R89 RES 2.21K OHM 1/10W 1% RM/10-2211B
R9 POT 2K TRIM RV-202
R90 RES 2.21K OHM 1/10W 1% RM/10-2211B
R91 RES 9.09KOHM 1/10W 1% RM/10-9091B
R92 RES 9.09KOHM 1/10W 1% RM/10-9091B
R93 RES 3.32K OHM 1/10W 1% RM/10-3321B
R94 RES 2.0K OHM 1/10W 1% RM/10-2001B
R95 RES 3.24K OHM 1/10W 1% RM/10-3241B
R96 RES 1.62K OHM 1/4W 1% RM/4-1621C
R97 RES 1.33K OHM 1/4W 1% RM/4-1331C
R98 24.9K OHM RES. 1/10 W 1% RM/10-2492B
R99 RES 1.0K OHM 1/10W 1% RM/10-1001B

C1 CAP 220PF 50V 5% CDS-221CAAA
C10 CAP 47PF 50V 5% CDS-470CAAA
C11 CAP 10UF 16V CER-106SM
C12 CAP 3300UF 35V CERS-338B
C14 CAP .47UF 50V CYV-474-033
C15 CAP .1UF 50V CYV-104-033
C16 CAP 3300UF 35V CERS-338B
C17 CAP .1UF 50V 10% CDS-104CBBB
C18 CAP .1UF 50V 10% CDS-104CBBB
C19 CAP .1UF 50V 10% CDS-104CBBB
C2 CAP 220PF 50V 5% CDS-221CAAA
C20 CAP .1UF 50V 10% CDS-104CBBB
C202 CAP 100PF 50V 5% CDS-101CAAA
C21 CAP 47PF 50V 5% CDS-470CAAA
C22 CAP .47UF 50V CYV-474-033
C23 CAP .47UF 50V CYV-474-033
C24 CAP .1UF 50V 10% CDS-104CBBB
C25 CAP .1UF 50V 10% CDS-104CBBB
C26 CAP .1UF 50V CYV-104-033
C27 CAP .1UF 50V 10% CDS-104CBBB
C28 CAP 2.2UF 50V CER-225CSM
C29 CAP 10UF 16V CER-106SM
C3 CAP .1UF 50V 10% CDS-104CBBB
C30 CAP .1UF 50V 10% CDS-104CBBB
C31 CAP .1UF 50V 10% CDS-104CBBB
C32 CAP 10UF 16V CER-106SM
C34 CAP .1UF 50V CYV-104-033
C35 CAP 100PF 50V 5% CDS-101CAAA
C36 CAP .0022UF 50V CYV-222-033
C38 CAP 47PF 50V 5% CDS-470CAAA
C39 CAP 47PF 50V 5% CDS-470CAAA
C4 CAP .1UF 50V 10% CDS-104CBBB
C40 CAP .001UF 50V CYV-102-033
C41 CAP .001UF 50V CYV-102-033
C42 CAP .001UF 50V CYV-102-033
C43 CAP .001UF 50V CYV-102-033
C44 CAP 220PF 50V 5% CDS-221CAAA
C45 CAP .01UF 50V CYV-103-033
C46 CAP .01UF 50V CYV-103-033
C47 CAP .001UF 50V CYV-102-033
C48 CAP .001UF 50V CYV-102-033
C49 CAP 220PF 50V 5% CDS-221CAAA
C5 .047UF 50V CYV-473-033
C50 CAP .001UF CDS-102CBAA
C51 .047UF 50V CYV-473-033
C52 CAP 120PF CDS-121CAAA

C53 CAP .1UF 50V CYV-104-033
C54 CAP 47PF 50V 5% CDS-470CAAA
C55 CAP .001UF 50V CYV-102-033
C56 CAP .001UF 50V CYV-102-033
C57 CAP .1UF 50V 10% CDS-104CBBB
C58 CAP .1UF 50V 10% CDS-104CBBB
C59 CAP 47PF 50V 5% CDS-470CAAA
C6 CAP 220PF 50V 5% CDS-221CAAA
C60 CAP .001UF 50V CYV-102-033
C61 CAP .001UF 50V CYV-102-033
C62 CAP-022UF 50V CYV-223-033
C63 CAP-022UF 50V CYV-223-033
C64 CAP .0022UF 50V CYV-222-033
C65 CAP 220PF 50V 5% CDS-221CAAA
C66 CAP 120PF 50V 5% CDS-121CAAA
C67 CAP .1UF 50V CYV-104-033
C69 CAP 47PF 50V 5% CDS-470CAAA
C7 CAP 220PF 50V 5% CDS-221CAAA
C70 CAP 10UF 16V CER-106SM
C71 CAP 3300UF 35V CERS-338B
C72 CAP 3300UF 35V CERS-338B
C75 CAP 47PF 50V 5% CDS-470CAAA
C76 CAP .47UF 50V CYV-474-033
C80 CAP .1UF 50V 10% CDS-104CBBB
C81 CAP .1UF 50V 10% CDS-104CBBB
C82 CAP .1UF 50V 10% CDS-104CBBB
C83 CAP 47PF 50V 5% CDS-470CAAA
C84 CAP .1UF 50V 10% CDS-104CBBB
C85 CAP .1UF 50V CYV-104-033
C86 CAP 220PF 50V 5% CDS-221CAAA
C87 CAP 120PF 50V 5% CDS-121CAAA
C88 CAP 120PF 50V 5% CDS-121CAAA
C9 CAP .1UF 50V 10% CDS-104CBBB

CR1 DIO DUAL BAV99L SS-260SM
CR10 BRIDGE RECTIFIER SS-0799-068
CR11 DIO DUAL BAV99L SS-260SM
CR13 DIO MMBD914L SS-803SM
CR14 DIO ZENER MMBZ5240BL SS-1052
CR15 DIO DUAL BAV99L SS-260SM
CR16 DIO DUAL BAV99L SS-260SM
CR2 DIO DUAL BAV99L SS-260SM
CR22 DIO MMBD914L SS-803SM
CR3 RD/GRN BICOLOR LED SS-2423
CR4 DIO DUAL BAV99L SS-260SM
CR5 DIO MMBD914L SS-803SM
CR6 DIO MMBD914L SS-803SM
CR7 DIO MMBD914L SS-803SM
CR8 DIO MMBD914L SS-803SM
CR9 DIO DUAL BAV99L SS-260SM

Q10 XSTR MMBT3906LT1 PNP SS-0791
Q11 XSTR MMBT5088L NPN SS-0114
Q12 XSTR MMBT5088L NPN SS-0114
Q13 XSTR MPS-A56 SS-101A-45
Q14 XSTR MMBT5088L NPN SS-0114
Q15 XSTR NPN MPSA06 SS-102A-45
Q16 XSTR MMBT5088L NPN SS-0114
Q17 XSTR MMBT5088L NPN SS-0114
Q18 XSTR MMBT5087L PNP SS-0115
Q19 XSTR MMBT3906LT1 PNP SS-0791
Q2 Regulator LM317 SS-1375
Q21 XSTR MMBTA06L SS-102SM
Q22 XSTR MPS-A56R SS-101A-45
Q23 XSTR NPN MPSA06 SS-102A-45
Q24 XSTR MMBT3904LT1 NPN SS-0792
Q25 XSTR MMBT5088L NPN SS-0114
Q26 XSTR MMBT5087L PNP SS-0115
Q27 XSTR MMBT5088L NPN SS-0114
Q28 XSTR MMBT5088L NPN SS-0114
Q29 XSTR MPS6521 SS-209
Q3 Regulator LM337 SS-1376
Q30 XSTR MMBT5088L NPN SS-0114
Q31 XSTR MMBT5088L NPN SS-0114
Q32 XSTR MMBT3906LT1 PNP SS-0791

– 17 –

!

Q33 XSTR MMBT3906LT1 PNP SS-0791
Q35 XSTR MMBT3906LT1 PNP SS-0791
Q37 XSTR MPS6521 SS-209
Q38 XSTR MMBT3906LT1 PNP SS-0791
Q39 XSTR MMBT3906LT1 PNP SS-0791
Q5 XSTR MMBTA06L SS-102SM
Q6 XSTR MMBT3906LT1 PNP SS-0791
Q7 XSTR MMBT3906LT1 PNP SS-0791
Q8 XSTR MMBT3904LT1 NPN SS-0792

U1 OPAMP TL072CD SS-143SM
U112 OPAMP TL072CD SS-143SM
U2 OPAMP TL072CD SS-143SM
U3 OPAMP TL072CD SS-143SM
U4 OPAMP TL072CD SS-143SM
U5 COMPTR QUAD LM339 SS-730SM
U7 OPAMP TL072CD SS-143SM
U8 OPAMP TL072CD SS-143SM

DS1 SW SIDE ACT DIP 4 POS SW-1649
DS12 SW SIDE ACT DIP 4 POS SW-1649
DS4 SW SIDE ACT DIP 4 POS SW-1649
DS8 SW SIDE ACT DIP 4 POS SW-1649

Components marked with this symbol are safety critical

!

and should only be replaced with identical components.

Los componentes marcados con el simbolo son

!

imprescindibles para la protección del equipo, por lo
cual que solo sean reemplazados por los mismos
componentes.

Les componsants marqués du symbole sont indis-

!

pensables à la sécuritée et ne peuvent être remplacés

!

qu'avec des composants identiques.

Bauteile, die mit einem gekenzeichnet sind, sind

!

sehr wichtig und dürfen nur mit den orginal Ersatzteilen

!

ausgetauscht werden.

I componenti contrassegnati da sono critici per la

!

sicurezza e devono essere rimpiazzati solo con ricambi

!

di valore identico.

!

J1
J2
JW1 SH 2X3 JUMPER CC-648
JW1 HDR 6 PIN DUAL ROW CC-673

V120
VV120

AC6 CONN IEC POWER INLET CC-1174
CHASS1

TS1 THERMISTOR 10K EPOXY SS-0426-066

MODEL: TRM6CE (230 VAC 50/60 Hz)

RES 0 OHM 1/4W (JUMPER WIRE) RMP/4-0000-03
FUSEHOLDER CAP 5X20mm FS-1269-A
5X20mm 0.8A SLO-BLO FUSE FS-1484-A
European Linecord <HAR> WIR10138

CONN XLR NEUTRIK NC3FAH-2-0
RCA JACK, SINGLE WHITE, GOLD

RES 0 OHM 1/4W (JUMPER WIRE)
RES 0 OHM 1/4W (JUMPER WIRE)

6.5" Woofer FG26387WP
1" Tweeter SPK10424
TRM6 MEHSA Bar WP-2439

HARNESS P1000 CHASSIS GND
FUSE 3A 3AG SLO BLO FS-003SB
FUSE HOLDER CAP 3AG FS-1175
FUSE HOLDER BODY PC MOUNT

Power Switch SHW9840
IEC Linecord WIR9856
Transformer TT-2326-E

CC-2339
CCH-232

RMP/4-0000-03
RMP/4-0000-03

FA-1401-A

FS-1176

!
!

!

!

!
!
!
!

!
!
!

!
!
!
!

– 18 –

TRM6 FUNCTIONAL BLOCK DIAGRAM

+15V

Regulator

Q2

V+

DC Offset

Integrator

U8B, C76, R146

Positive

Input Buffer

U8A

Negative

Input Buffer

U1B

Protection Switch

CMRR
Adjust

R58

Soft Start Delay
Q24, C70, R13

Current Mirror

Q10, Q19

Differential Amp

Q27, Q28

Current

Source

Q21

Pre-Driver

Q26

Feedback

Networks

Bias

Adjust

R11, Q29

Pre-Driver

Q25

-15V

Regulator

Q3

Driver
Signal

Q23, Q22

Driver

Q30, Q32

Local

Feedback

C51, R142

Driver

Q31, Q33

Output

Q20

Output

Output

Q4

V–

– 19 –

S ERVICE REFERENCE

!

CIRCUIT OPERATION

trans•ana Implementation

The transistor Q24 is configured to operate as a switch that controls the constant current source Q21 of the differential
amplifier Q27 and Q28. Switch Q24 is under the control of the thermal and turn-on circuits, and provides a Soft Start
turn-on ramp according to the charging time of C70 through R13 and R156.

U8B is configured as a DC servo-integrator to null the output offset voltage. Class AB bias current is established by Q29,
and adjusted by R11.

The positive and negative input signals are conveyed to the pre-driver transistors Q25 and Q26 by the differential
amplifier Q27 and Q28, and by current mirror Q10 and Q19. Drivers Q22 and Q23 make the transition from the low­voltage front-end circuit to the high-voltage output stage. Buffer transistors Q30 and Q32 enhance the front-end drive
current, and drive the positive output MOSFET Q20. The same is true for buffer transistors Q31 and Q33 and negative
output MOSFET Q4.

CALIBRATION

WARNING: Only a competent technician should attempt the following procedure.

Qualified Service Personnel Only

Bias:

The bias control establishes the quiescent Class AB output current of the amplifier. The bias should not need
readjustment from the factory setting: however, if the amplifier is repaired and the output devices have been changed,
calibrating the bias is necessary. Disconnect the power to the amplifier before removing the heatsink assembly from
the speaker cabinet. To adjust the bias, remove the jumper JW1 and connect an ammeter across the exposed pins. Adjust
trimpots R11 and R9 fully counter-clockwise before reapplying power to the unit. After the Soft Start turn-on has settled,
note the ammeter reading. Adjust R11 until an additional 50mA is created. Then adjust R9 until another 50mA is added
to the ammeter reading. Replace jumper JW1.

– 20–

Input Circuit

!

The input signal is connected to the amplifier
through the balanced XLR connector J1, or the
unbalanced RCA connector J2. Balanced/unbal­anced switch DS1 will ground the inverting input
buffer, allowing operation with an unbalanced
signal on either connector. Input buffers U1A and
U1B provide a stable input impedance, dominated
by R10 and R4. The input circuit gain is set by
switches DS2-DS6. Each switch inserts a different
divider resistor for the feedback resistors R88 and
R169, resulting in up to 15dB of additional input
gain when DS6 is closed. Trimpot R8 adjusts the
common-mode-rejection of the woofer channel.

The non-inverting input signal from U1A pin 1, and
the inverting input signal from U1B pin 7, are
summed together to form an unbalanced signal at
U4A pin 1.

Input

Connector

J1

J2
DS1
R10

R4

Qualified Service Personnel Only

Non-Inverting

Input Buffer

U1A, R88

Summing

Sensitivity

Adjust

DS2 - DS6

Inverting Input

Buffer

U1B, R169

Amplifier

R109, R110,

R111, R112, R8

Tweeter Crossover

Balanced

Input Signal

U1A, U1B

43µs

Delay

U3B, U3A

High Frequency

Shelf U7B

DS13 - DS16

2nd Order HP

3200Hz

U7A

2nd Order HP

3200Hz

U8A

R107, R177

R106, C40, C41

Sensitivity Adjust

R104, R105

The balanced input signal at U1A pin 1 and U1B pin 7 connects to a 2-stage 39µs delay, using U3A and U3B. This
is followed by the high-frequency shelf circuit at U7B. Switches DS13-DS16 add various reactive components to the
feedback network of U7B, resulting in +4dB, +2dB, –2dB, or –4dB of gain shelving above 5kHz. The next stage at U7A
is a 3.2kHz 2nd order high-pass filter. The last stage consists of another 3.2kHz 2nd order high-pass filter, bringing the
overall tweeter crossover response to a 4th order 24dB/octave slope. The final components before the tweeter amplifier
(R104 and R105 ) can provide up to 2dB of additional gain to the tweeter channel.

– 21 –

Qualified Service Personnel Only

!

Woofer Crossover

2nd Order HP
Unbalanced
Input Signal

U4A

2nd Order LP

3200Hz

U112B, R85,

R98, C64, C48

Sensitivity Trim

R136, R137

30Hz-60Hz

U112A, R49,

R76, R164,

R130, C45, C46,

DS7, DS8

Low Frequency

Shelf

U112A

DS9 - DS12,

C85

2nd Order LP

3200Hz

U2A, R82, R44,

C36, C42

The input signal at U4A pin 1 connects to the 3200Hz 2nd order low-pass filter at U112B. Approximately 2dB of
additional gain can be added to this stage by adjusting R136 against the divider resistor, R137. The next stage is a
30Hz-60Hz switchable sub-sonic high-pass filter. This is followed by an adjustable low-frequency shelving filter which
defaults at +6dB gain, according to the feedback resistors R129 and R134, and dividers R131 and R128. DS9-DS12 will
switch in various reactive feedback networks to accomplish +4dB, +2dB, –2dB, or –4dB of gain shelving below 200Hz.
The last stage is another 3200Hz 2nd order low-pass filter at U2A, which cascades with the previous filter at U112B
to produce an overall 4th order slope of 24dB/octave for the woofer amplifier.

Thermal Protection

Soft Start Switches

Q8, Q24

Temp

TS1, R25

Comparator

U5B

CLIP/THERMAL

Indicator

CR3

The thermal protection is activated, and shuts down audio operation, when the amplifier heatsink reaches an
excessively high temperature. The voltage divider R22 and R23 establishes the reference voltage on pin 5 of U5B. The
control voltage on pin 4 is established by the voltage divider TS1 and R25. TS1 is a NTC (Negative Temperature
Coefficient) thermistor mounted on the heatsink. As TS1 warms and the resistance falls, the voltage on pin 4 rises. When
the voltage on pin 4 exceeds the voltage on pin 5, the output on pin 2 goes low, shutting down the Soft Start switches
Q8 and Q24, and lighting the CLIP/THERMAL indicator red.

– 22 –

Clipping Indicator

!

Qualified Service Personnel Only

Drive

Signals

DR,

DRTWT

Clipping

Detectors

U5A, U5D

CLIP/THERMAL

Indicator

CR3

The CLIP indicators are driven by the comparator U5A and U5D. The voltage divider R56, R57, and R51, R61
establishes the reference voltage for the Clipping detector at pin 7 of U5A and pin 9 of U5D. Excessive drive signal at
pin 6 or pin 8 will trigger its comparator low and light the CLIP/THERMAL indicator red.

On Indicator

Clipping
Detector

U5A, U5D

LED Driver

Q35, Q36

ON

Indicator

CR3

The bicolor LED, CR3, will remain green unless a THERMAL or CLIP condition is detected. The outputs of comparators
U5A and U5D will be high, and Q35 will be off, allowing current to flow through the green LED of CR3 from ground
to –17V.

– 23 –

TWEETER REPLACEMENT

!

1. Remove (4) screws from wave guide using a 3/32" Allen Wrench

2. Remove wave guide assembly from enclosure

3. Disconnect the LED harness (FIG. 1)

4. Disconnect the (2) speaker wires from the tweeter (FIG. 2)

5. Disconnect the (2) power switch wires (FIG. 3)

6. Unclip the tweeter from wave guide (4 catch fingers)

7. Position the replacement tweeter into wave guide

8. Snap the tweeter into wave guide

9. Follow steps 1-5 in reverse order to install wave guide assembly

CAUTION: Reconnect wires as indicated in each diagram!

!

Qualified Service Personnel Only

Wave Guide Assembly

FIG. 1

LED Harness

WOOFER REPLACEMENT

1. Remove (4) screws from woofer using a 3/32" Allen Wrench

2. Remove woofer from enclosure

3. Disconnect (2) speaker wires (FIG. 4)

4. Follow steps 1-3 in reverse order to install new woofer

!

CAUTION: Reconnect wires as indicated in each diagram!

Tweeter Replacement #SPK10424

FIG. 2

FIG. 3

Power Switch

FIG. 4

Woofer Replacement

– 24 –

AMPLIFIER REPLACEMENT

!

1. Remove (2) screws from back using a 3/32" Allen Wrench (FIG. 5)

2. Disconnect PCB mounted LED harness (FIG. 6)

3. Disconnect PCB mounted tweeter speaker wires (FIG. 7)

4. Disconnect PCB mounted woofer speaker wires (FIG. 7)

5. Disconnect PCB mounted transformer primary wires (FIG. 8)

6. Disconnect PCB mounted transformer secondary wires (FIG. 8)

7. Disconnect PCB mounted power switch wires (FIG. 8)

CAUTION: Reconnect wires as indicated in diagram!

!

Qualified Service Personnel Only

–

3

+

21

XLR Connections

®

A Division of Rockford Corp.
Tempe, AZ 85281 U.S.A.
Made in the U.S.A.

Reference Monitor - TRM6

Bass Shelving
SELECT ONE

+4
+2

0
–2
–4

30Hz

Sensitivity

dBU input required for 100dB SPL@ 1m

SELECT ONE

Bass Roll Off

SELECT 30Hz

OR 60Hz

dB

Treble Shelving

200Hz

SELECT ONE

dB

5kHz 20kHz

Signal In

XLR

Balanced

+4dBu

30Hz 60Hz

0dB

0dB

+4
+2
0
–2
–4

Remove

ana

Trans•

only

these

(2) screws

CAUTION

RISK OF ELECTRIC SHOCK

DO NOT OPEN

!

WARNING: DO NOT REMOVE COVER

TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK
DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE.

115 V~

140W

60 HZ

Max

250V T3A

FIG. 5

Amplifier Replacement

RCA

- Unbal

- +1dBu

- -2dBu

1234

ON

- -5dBu

- -8dBu

- -11dBu

- 30Hz

1234

ON

- 60Hz

- +4dB

- +2dB

- -2dB

1234

ON

- -4dB

- +4dB

- +2dB

- -2dB

1234

ON

- -4dB

FIG. 6

PCB Mounted LED Harness

FIG. 7

PCB Mounted Speaker Wires

TRANSFORMER REPLACEMENT

The TRM6 is available both 120V and 230V
versions. If it is necessary to perform service on
the amplifier, be sure to check connections to
the transformer before re-applying power and/
or re-assembling the unit.

PC BOARD

BLK

WHT

BRN

GRY

WHT

120V
Transformer

FIG. 8

Transformer / Power Switch Wires

BLK

GRY
BRN

PC BOARD

BLK

WHT

BRN

GRY

WHT

230V
Transformer

BLK

GRY
BRN

CAUTION: Reconnect wires as indicated in

!

diagram!

MODEL TRM6

120V 50Hz VAC

– 25 –

Power
Switch

BLK

BRN

Power
Switch

BLK

BRN

MODEL TRM6CE

230V 50/60Hz VAC

SERVICE POLICY AND LIMITED WARRANTY

Rockford Corporation (Hafler Division) offers a limited warranty on Hafler products on the following terms:

• Length of Warranty

1 year on Reference Monitors

• What is Covered

This warranty applies only to products sold to the original owner and is non-transferable. This warranty only applies
to units sold in the continental United States. You are required to have a copy of the receipt stating the customer's name,
dealer name, product purchased and date of purchase.

• Products found to be defective during the warranty period will be repaired or replaced (with product deemed to be

equivalent) at Hafler's discretion.

• What is NOT Covered

1. Damage caused by accident, abuse, improper operations, water, theft

2. Service performed by anyone other than Hafler or an Authorized Hafler service center

3. Any product purchased outside the United States (please contact your local dealer)

4. Shipping charges to get the unit to Hafler

5. Any product which has had the serial number defaced, altered, or removed

• Limit on Implied Warranties

Any implied warranties including warranties of fitness for use and merchantability are limited in duration to the period
of the express warranty set forth above. Some states do not allow limitations on the length of an implied warranty, so
this limitation may not apply. No person is authorized to assume for Hafler any other liability in connection with the
sale of the product.

• How to obtain service or technical support

Please call 1-800-669-9899 for Rockford/Hafler support. You must obtain an RA # (return authorization number) to
return any products to Hafler. You are responsible for shipment of product to Hafler.

Rockford Corporation
Hafler Division
2055 E. 5th Street
Tempe, Arizona 85281

– 26 –

®

HAFLER

A DIVISION OF

ROCKFORD CORPORATION

546 SOUTH ROCKFORD DRIVE

TEMPE, ARIZONA 85281 U.S.A.

602-967-3565 / 1-888-HAFLER1

WWW.HAFLER.COM

This product is designed, developed and assembled in the USA by a dedicated

group of American workers. The majority of the components used in the

construction of this product are produced by American companies. However, due

to the global nature of their manufacturing facilities and the electronics parts

industry in general, some parts may be manufactured in other countries.

LIT 10427
3/99 E.W.R.

MADE IN THE USA