Hafler TRANSANA TRM10S, TRM12s Installation And Operation Manual

TRM10s

SUBWOOFER MONITORING SYS

TRM12s

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: EN55013-1

EN55103-2

EN60065 (safety)

Manufacturer’s Name: Hafler

Manufacturer’s Address: 546 South Rockford Drive, Tempe, Arizona 85281

Importer’s Name: _______________________________________________________

Importer’s Address: _______________________________________________________

Type of Equipment:

Model No.: TRM10s TRM12s

Serial Number:

Year of Manufacturing: 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

S

UBWOOFER MODEL

Free Field Frequency Response 27Hz-110Hz, ±2dB 25Hz-110Hz, ±2dB
Peak Acoustic Output ≥112dB (w/music @ 2m) ≥115dB (w/music @ 2m)
Total Harmonic Distortion (THD) <3%, 30Hz-90Hz (90dB @ 2m) <3%, 25Hz-90Hz (90dB @ 2m)
Low Frequency Driver 10" (254mm) Cellulose Fibre Cone 12" (305mm) Cellulose Fibre Cone

Cabinet 1.0ft
Dimensions 14.75"(H) x 16"(W) x 16"(D) 18.25"(H) x 19.50"(W) x 19.375"(D)

Net Weight 53 lbs. (24kg) 94 lbs. (42kg)

TRM10

Santoprene Rubber Surround Santoprene Rubber Surround
2" (51mm) 4-Layer Voice Coil 2.5" (63.5mm) 4-Layer Voice Coil
30 oz. Magnet 102 oz. Magnet

(37.46cm x 40.64cm x 40.64cm) (46.35cm x 49.53cm x 49.21cm)

S

3

(28 Liter) Vented Down Firing 2.0ft3 (56 Liter) Vented Down Firing

TRM12

S

Frequency Response @ 2m*

A

MPLIFIER SECTION

Power Rating 200 W RMS @ 4 ohms
Signal-to-Noise >100dB
CMRR >70dB typical @ 60Hz
Input Impedance 47kΩ per phase balanced, 47kΩ unbalanced
Input Sensitivity Range 160mV to 5V (unbalanced)

80mV to 2.5V (per phase balanced)

Gain +45dB max. to +15dB min.
Power Consumption Idle Power: 11W / 150mA @ 120 VAC

Idle Power: 11W / 90mA @ 230 VAC
Normal Operation: 68W / 770mA @ 120 VAC
Normal Operation: 66W / 380mA @ 230VAC
Full Power: 330W / 3.3A @ 120VAC
Full Power: 315W / 1.7mA @ 230VAC

Rear Panel Balanced XLR Inputs

Unbalanced RCA Inputs
Gain Control (30dB range)
Low Pass Crossover (variable 40Hz~140Hz)
Phase DIP Switches (0°, -90°, -180°, -270°)

*Frequency response generated with 60Hz low pass crossover engaged

Frequency Response @ 2m*

TRM10s Dimensions

H = 14.75"

D = 16"

W

16"

TRM12s Dimensions

H = 18.25"

LOW-P

Crossover Frequency Variable from 40Hz~140Hz
Crossover Slope 24dB/octave (4th order) Linkwitz-Riley
Subsonic Filter 12dB/octave (-3dB @ 18Hz)

ASS CROSSOVER SECTION

D = 19.375"

W

19.50"

Specifications are subject to change without notice.

– vi –

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.

– v –

ADVERTENCIA – INFORMACION DE SEGURIDAD IMPORTANTE

El símbolo de flecha relámpago dentro de un triángulo equilátero, es para

SPAÑOL

E

Para Prevenir el incendio o la descarga electrica, no

exponer este equipo a la lluvia o a la humedad.

PELIGRO

RIESGO DE DESCARGA

ELÉCTRICA NO ABRÍR.

PRECAUCÍON:

!

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.

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.

– iv –

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.

RANÇAIS

F

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 colli-
sions excessives ainsi que des surfaces inégales peuvent renverser
l'ensemble du matériel et du charriot.

– iii –

ACHTUNG – WICHTIGE SICHERHEITS – INFORMATIONEN

EUTSCH

D

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.

ACHTUNG

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.

– ii –

NOTARE – IMPORTANTI INFORMAZIONI SULLA SICUREZZA

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

TALIANO

ATTENZIONE

I

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.

– i –

T ABLE OF CONTENTS

PERFORMANCE SPECIFICATIONS .........................................................................................................................vi

Frequency Response Graphs

SAFETY PRECAUTIONS ...........................................................................................................................................v

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

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

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

SCHEMATIC DIAGRAMS ....................................................................................................................................... 5

INSTALLATION

Location ........................................................................................................................................................... 9

Studio Installations ........................................................................................................................................... 9

Home Theater Installations ............................................................................................................................... 9

Input Switch ................................................................................................................................................... 10

XLR Wiring Configurations ............................................................................................................................. 10

OPERATION

Auto Turn-On/Sleep Mode ............................................................................................................................. 11

Input Sensitivity .............................................................................................................................................. 11

Low-Pass Crossover ........................................................................................................................................ 11

Phase Control ................................................................................................................................................. 12

AC Line .......................................................................................................................................................... 13

LED Indicator ................................................................................................................................................. 13

Break-In and Warm Up .................................................................................................................................. 13

Cleaning and Maintenance ............................................................................................................................. 13

SERVICE REFERENCE

PC Board Layout............................................................................................................................................. 14

Parts List ......................................................................................................................................................... 15

TRM10s/TRM12s Functional Block Diagrams ................................................................................................. 17

Input Circuit ................................................................................................................................................... 17

Mono Sum/Gain Circuit.................................................................................................................................. 17

Phase Control Circuit...................................................................................................................................... 17

Buffer/Gain Trim Circuit ................................................................................................................................. 17

Filter Circuits .................................................................................................................................................. 17

Class-G Trans•

Soft Start Circuit.............................................................................................................................................. 18

Power On/Off Circuit ..................................................................................................................................... 19

Signal Sensing Turn-On Circuit....................................................................................................................... 19

Thermal Protection ......................................................................................................................................... 19

Circuit Calibration .......................................................................................................................................... 20

Amplifier Replacement ................................................................................................................................... 21

Woofer Replacement ...................................................................................................................................... 21

WARRANTY ......................................................................................................................................................... 22

ana

Amplifier .......................................................................................................................... 18

INTRODUCTION

Thank You and congratulations on your purchase of the HAFLER TRM10s/TRM12s reference monitor, the world's finest
brand in professional audio equipment.

The TRM10s (Trans•
subwoofer monitor. Both models offer unmatched quality and performance in a truly professional grade product. The
TRM10s/TRM12s are 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.

ana

Reference Monitor) is an amplified 10" subwoofer monitor. The TRM12s is an amplified 12"

TECHNICAL DESIGN FEATURES

The TRM10s/TRM12s monitors utilize a specially designed amplifier featuring our innovative Trans•
topology, with its unique input-to-output configuration (derived from our patented Trans•
MOSFETs in both the power supply and output stages that result in superior sound quality.

The amplifier features an auto turn-on/off circuit that eliminates the need for a conventional power switch. Input
signals can be fed into the amplifier via Balanced XLR jacks (where long cable runs are used) or into standard Un­Balanced RCA jacks (where short cable runs are used). Each pair of inputs is combined into a mono-summed signal
before being fed into a 4th order Linkwitz-Riley low-pass crossover, variable from 40Hz~140Hz. If selected, the signal
is then fed into the Phase Warp that allows the phase of the signal to be adjusted at 90˚, 180˚, or 270˚ increments.

nova

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circuitry. This

circuit), employs

The TRM10s features a 10" (254mm) low frequency transducer with a cone made from cellulose fibre. A santoprene
rubber surround that is immune to temperature fluctuations controls woofer damping and reduces 2nd harmonic
distortions for a very wide and flat frequency response. The transducer also features a 2" (51mm) 4-layer copper voice
coil wound on an aluminum voice coil former and is driven by a 30 oz. magnet. The TRM12s features a 12" (305mm)
low frequency transducer made with the same cellulose fibre cone and santoprene rubber surround. The 12" trans­ducer features a 2.5" (63.5mm) 4-layer copper voice coil wound on an aluminum voice coil former driven by a 102 oz.
magnet.

Both the TRM10s and TRM12s are downfiring subwoofer models and are vented using a radiused Aerovent for reduced
turbulence. The cabinet is made from acoustically dead 19mm MDF material and is internally packed with damping
material to eliminate internal resonance.

– 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 allows us to
squeeze more watts per cubic inch from every output device as well as provide consistent thermal stability.

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

The Way

PC Board

Clamp Bar

Heat generating component

(typically a power MOSFET or

bipolar semiconductor)

Thermal grease

Thermal grease

Heat sink

Heat path

Mica

Screw

The Old Way

PC Board

Trans•

®

Trans•

ana

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 –

Subsonic Filter

®

The TRM series uses a Subsonic Filter to prevent the woofer from reproducing inaudible frequencies. Subsonic
frequencies (known as infrasonic frequencies) are signals below the normal human hearing range and are generally
considered to be below 20Hz. The subsonic filter reduces the energy of these frequencies and restrains the woofer from
operating outside its optimum linear excursion. This type of electronic control eliminates the mechanical distortion
caused by a woofer traveling beyond its XMAX, improves power handling, increases reliability and improves sonic
performance.

THE RESULT: Improved power handling, increased reliability and improved sonic performance.

Phase Control

®

The Phase Control is used to align the arrival time of the subwoofer's
low frequency information with high frequency information pro-

Reference

Monitor

Subwoofer

duced by additional reference monitors. Aligning both signals will
insure that both low and high frequencies arrive at the listening
position at the same time. This eliminates the possibility of acousti­cal cancellation and improves the reproduction of transients.

+
_

THE RESULT: Eliminates phase cancellation and improves transient
response.

0°

90°

The Phase Control can fix up to 270° degrees in phase shift

between the outputs of a reference monitor & subwoofer.

180°

270°

360°

Woofer

Santoprene Rubber Surround

®

Santoprene is a very durable and temperature tolerant material which provides a consistent support necessary for the linear
motion of the speaker cone. In addition, the damping capabilities eliminate the transmission of sonic disturbances between
the cone and the frame of the speaker. This greatly improves the accuracy of the woofer's low frequency response.

THE RESULT: Improves woofer's low frequency response.

Aluminum Voice Coil Former

®

The transducer's voice coil former is black anodized aluminum for highly efficient thermal transfer. Another method of
producing voice coils is with Kapton® formers. Although this material is very resistant to heat, any heat generated by the
transducer is "trapped" on the copper voice coil windings. HAFLER uses aluminum voice coil formers because aluminum
acts like a "heat sink" and helps dissipate heat away from the voice coil. This allows winding high temperature copper wire
in multiple layers for improved efficiency.

THE RESULT: Improves power handling by efficiently dissipating heat.

– 3 –

460 W

MAX

250V T4A

115 V~

60 HZ

Model

TRM10S

WARNING: DO NOT REMOVE COVER

TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK

DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE.

!

CAUTION

RISK OF ELECTRIC SHOCK

DO NOT OPEN

Trans•

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Reference Monitor Subwoofer

A Division of Rockford Corp.

Tempe, AZ 85281 U.S.A.

Made in the U.S.A.

®

XLR Connections

3

21

+

–

-27

-24

-21

-15

-1

2

-9

-6

-3
0dB

-30dB

Signal In

(Balanced)

Gain

dB relative to

max gain.

3dB steps

Signal In

(Unbalanced)

50

60

70

80

90

1

0

0

120

140

40HZ

234

Phase @ 80Hz

- 270˚ 2

- 180˚ 2 + 3

- 90˚

2 + 3 + 4

XLR Bal

OFF

Low Pass

RCA Unbal.

0˚

ALL OFF

-1

8

460 W

MAX

250V T4A

115 V~

60 HZ

Model

TRM10S

WARNING: DO NOT REMOVE COVER

TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK

DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE.

!

CAUTION

RISK OF ELECTRIC SHOCK

DO NOT OPEN

Trans•

ana

Reference Monitor Subwoofer

A Division of Rockford Corp.

Tempe, AZ 85281 U.S.A.

Made in the U.S.A.

®

XLR Connections

3

21

+

–

-27

-24

-21

-15

-1

2

-9

-6

-3
0dB

-30dB

Signal In

(Balanced)

Gain

dB relative to

max gain.

3dB steps

Signal In

(Unbalanced)

50

60

70

80

90

1

0

0

120

140

40HZ

234

Phase @ 80Hz

- 270˚ 2

- 180˚ 2 + 3

- 90˚

2 + 3 + 4

XLR Bal

OFF

Low Pass

RCA Unbal.

0˚

ALL OFF

-

18

12" Subwoofer

(located inside)

AC Line Input

Heatsink

AC Line Fuse

TRM12s

Front View

TRM10s

Front View

Rear View

Port in Rear

Rear View

AC Line Input

Heatsink

Feet

AC Line Fuse

10" Subwoofer

(located inside)

– 4 –

Bal/Unbal

Input Switch

XLR Input

Low-Pass

RCA Input

Input Sensitivity

Crossover

Phase Switch

SCHEMATIC DIAGRAM

NOTES: Unless specified otherwise

1. All resistors in ohms.

2. All capacitors in microfarads.

– 5 –

!

Qualified Service Personnel Only

Input Circuit / Power Supply Schematic

– 6 –

SCHEMATIC DIAGRAM

NOTES: Unless specified otherwise

1. All resistors in ohms.

2. All capacitors in microfarads.

Removable Center Spread

!

Qualified Service Personnel Only

Output Circuitry

Removable Center Spread

I NSTALLATION

LOCATION

The acoustic properties and size of the listening environment can drastically influence the

SPL

(Sound Pressure Level) and

3

f

(-3dB roll-off) of the subwoofer. However it's important to note that large or small acoustic spaces have little to no effect on the

"Q."

subwoofer cone excursion & box

For the most part, we'll discuss the optimum location for two different installation methods:

Studio Installation and Home Theater Installation.

Studio Installations

In studio installations, damping material is usually used on the walls and ceilings make the room “acoustically dead.” The
main monitors are typically located 3' to 6' from the mixing console and therefore considered a near field (close field)
application. In this type of anechoic environment, the subwoofer will tend to experience minimal "Boundary Loading"
effects. For studio installations, HAFLER recommends experimenting with different locations within the studio that minimizes
rattles or vibration of other equipment. You can fire the subwoofer downward (FIG. 1) or fire the subwoofer directly facing
forward (FIG. 2). In either application keep the subwoofer cabinet at least 5" (12.7 cm) away from any wall.

Keep subwoofer enclosure

FIG. 1

5" (12.7 cm) from any wall

Downward Firing

Home Theater Installations

Home Theater installations are typically medium sized
living rooms or game rooms that have large flat, uncov­ered walls. Acoustics in this type of installation can have
a big effect on the

SPL

3

and

f

of the subwoofer because
the walls are very reflective. The only elements in these
installations that acoustically "absorb" sounds are
furniture and carpet. Dramatic "Boundary Loading" can
be achieved by locating the subwoofer under a table, next
to a wall or in a corner (FIG. 4), thus increasing
lowering the

3

f

of the subwoofer system. Locating the

SPL

and

subwoofer in the middle of the room or in a large open
area where there are few reflective surfaces will cause a
decrease in

SPL

and an increase in

3

f

. Experiment with
different locations in the room to determine which type of
bass response works best in your home theater.

FIG. 2

Forward Firing

Right
Front

Subwoofer

Right

Rear

Left

Rear

Left

Front

Center

Front

Listening Area

FIG. 4

Position the subwoofer near a wall or in a corner

-9 -

INPUT SWITCH

The unbalanced input uses a conventional RCA phone jack. Move the input switch to RCA UNBALANCED 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
to XLR BALANCED to use this jack.

Unbalanced Input

Move input switch to RCA UNBALANCED to use
RCA connectors

XLR Bal

60

70

50

80

40HZ

Low Pass

RCA Unbal

90

0

4

1

120

OFF

100

234

Phase @ 80Hz
0˚

- 270˚ 2

- 180˚ 2 + 3

- 90˚

ALL OFF

Signal In
(balanced)

-15

-18

-21

-24

-27

dB relative to

max gain in

2

-1

-9

-30dB

Gain

3dB steps

-6

-3

0dB

Signal In

(Unbalanced)

2 + 3 + 4

Balanced Input

Move input switch to XLR BALANCED to use the
XLR connectors

XLR Bal

60

70

50

80

40HZ

Low Pass

RCA Unbal

90

0

4

1

120

OFF

100

234

Phase @ 80Hz

0˚

- 270˚ 2

- 180˚ 2 + 3

- 90˚

ALL OFF

2 + 3 + 4

Signal In
(balanced)

-1

-15

-18

-21

-24

-27

dB relative to

max gain in

3dB steps

2

-30dB

Gain

-9

-6

-3

0dB

Signal In

(Unbalanced)

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 are balanced and unbalanced methods in which the XLR inputs can be used.
The first method is an XLR Balanced Input using 3-conductor cable with signal carried on the first conductors, equal in amplitude
and opposite in phase, and the third conductor being a ground "drain". In this configuration, noise common on both phases of
the signal is 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
lengths to prevent residual ground noise.

XLR Balanced Input

Check output from source for proper signal polarity

INPUT FROM

Pin 1 = GND
Pin 2 = (+)
Pin 3 = (–)

1
2

GND

–

3

+

SOURCE

XLR Unbalanced Input

Connect (–) and GND (shield) terminals at

prevent unstable amplifier operation

INPUT FROM

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

1

3

2

SHIELD

+

both ends

SOURCE

of cable to

– 10 –

OPERATION

AUTO TURN-ON / SLEEP MODE

The TRM10s/TRM12s subwoofers automatically turn on when they sense an input signal. When the signal being fed to the
TRM10s/TRM12s is turned off, the subwoofer's amplifier will turn off and go into "sleep mode." This feature eliminates the
inconvenience of operating a mechanical switch.

INPUT SENSITIVITY

The Input Sensitivity is used to match the TRM10s/TRM12s with signal levels from a variety of mixing consoles. The Input
Sensitivity uses a potentiometer to match input levels over a 30dB range and is variable from +1dBu to -30dBu. The numbers listed
on the back panel indicate the input in dBu required to produce an output of 100dB SPL @ 1 meter. When the control is set to
its full CLOCKWISE position the monitor is matched to +1dB input level (the input circuit is less sensitive to the amplitude of the
input signal). When the control is set to its full COUNTER CLOCKWISE position the monitor is matched to -30dB input level (the
input circuit is more sensitive to the amplitude of the input signal).

LOW-PASS CROSSOVER

The Low-Pass Crossover is used to set the electrical cutoff point
of the subwoofer enclosure. The Crossover uses a variable
potentiometer to set the cutoff point anywhere between 40Hz
and 140Hz. When the control is set to its full CLOCKWISE
position the cutoff frequency is set to 140Hz Low-Pass. When
the control is set to its full COUNTER CLOCKWISE position the
cutoff frequency is set to 40Hz Low-Pass.

It is important to match the Low-Pass crossover point of the
subwoofer with the High-Pass crossover point of the high
frequency reference monitors. Mismatching the crossover
points can cause dips or peaks in the acoustical response.
Overlapping the crossover points (i.e., subwoofer at 60Hz
Low-Pass & high frequency monitors at 50Hz High-Pass) will
cause a peak between 50Hz and 60Hz. Underlapping the
crossover points (i.e., subwoofer at 40Hz Low-Pass & high
frequency monitors at 70Hz High-Pass) will cause a dip
between 40Hz and 70Hz.

*This graph was generated by setting the variable crossover to

40Hz, 50Hz, 60Hz, 70Hz, 80Hz, 90Hz, 100Hz, 120Hz & 140Hz.

70

80

60

90

40HZ

Low Pass

140

100

120

50

50

Electrical Crossover Response*

60

70

40HZ

Low Pass

80

90

100

140

120

– 11 –

PHASE CONTROL

The Phase Control switches allow the TRM10s/TRM12s to be acoustically aligned with other speakers in your system.
0˚, -90˚, -180˚, or -270˚ degrees of phase shift at 80Hz can be selected using DIP switches 2, 3, and 4. For 0˚ degrees
of phase shift, leave all three switches in the OFF (up) position. –270˚ degrees of phase shift occurs when switch 2 is
selected in the ON (down) position. –180˚ degrees can be achieved by selecting both switches 2 and 3 in the ON
(down) position. Finally, selecting all switches 2, 3, and 4 in the ON (down) position produces –90˚ degrees of phase
shift.

Setup Procedure

1) Place all your speakers and any acoustically significant components in their working location in the
listening environment.

2) Insert a sine wave signal into the audio path. Be careful to turn down the level before turning on the amplifiers.

3) Choose a frequency that corresponds to the crossover frequency between the TRM10s/TRM12s and the full-range
speakers.

4) From the listening position, alternate between the TRM10s/TRM12s and the full range speakers and adjust the
levels until they have the same acoustic output. Use an SPL meter, a microphone on a VU meter, or your ears to
accomplish this.

5) With all speakers on, try the 0˚, -270˚, -180˚, and –90˚ degree phase settings. The setting with the highest SPL
reading from your listening position will produce the most effective acoustic alignment.

6) Set the TRM10s/TRM12s gain control according to your preference. This will not affect the acoustic alignment of
your system.

Here is a list of some items that can affect acoustic alignment: Relocating speakers, changing the TRM10s/TRM12s
Low Pass frequency, changing the acoustic environment (i.e., traps, diffusors, etc.), changing the listening position.

Although this procedure produces the maximum achievable acoustic gain for your system, listening tests may still lead
you to prefer another setup.

Input (2 cycles)

12dB
High Pass
90° Lead

Sine
Wave

12dB
Low Pass
90° Lag

+

90 phase lead

Moved ahead 1/4 cycle

_

90 phase lag

90 Phase Lead and Lag

Example of how phase misalignment between high frequency speakers and a subwoofer can cause cancellation

Moved back 1/4 cycle

Phase Shift
180° (cancellation)

– 12 –

AC LINE

The TRM10s/TRM12s operate from a 115 VAC/60Hz power line. The TRM10sCE/TRM12sCE operate 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.

LED INDICATOR

Amplifier operation is monitored internally and has a status LED.
This indicator can be used for system troubleshooting. The LED will
illuminate GREEN if signal is present at the subwoofer's input. The
LED will turn off and the amplifier will go into sleep mode if signal
is not present.

BREAK-IN and WARM-UP

We recommend initially breaking in the subwoofer 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 amplifier, we recommend letting
it warm up for 1 hour before beginning any critical listening.

COLOR STATUS

GREEN Power on

NO LED Sleep Mode

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.

– 13 –

PC BOARD LAYOUT

!

J5

J10

J9

CR10

R125

C12

R126

R124

Qualified Service Personnel Only

C72

C13

C35

CR7

R19

R12

HAFLER

X1

X12

X5

BLK1

RED1

R26

C19

CR2

R21

R16

C31

CR15

C85

PC-1960-E

TP1

CR16

X13

X6

X9

R46

R45

C4

R22

C17

C20

CR6

R43

U15

R17

CR5
R18

C29

C30

R145

U16

CR9

R78

C84

R146

R57

C28

R102

U2

C45

R84

U4

R103
C9

R111

R75

C39

C57

C55

C38

CHASS1

J6

C16

C15

Q1

Q10

R121

R86

Q21

R81

C88

C47

R279

Q12

R80

Q17

CR11

Q19

R5

Q11

Q5

C3

R47

C18

U112

C25

C27

R112

R64

R110

R109

R278

Q7

Q6

R1

R39

R38

C93

Q8

R127

C5

R62

C34

CR3

C74

C73

C48

R114

R113

R107

R100

R101

R61

U3

C26

R104

R54

C41
R24
R32

C58

R11

R42

R52

C40

R36

C7

C56

C24

R3

R4

R15

C6

R2

R10

Q4

CR4

Q37

Q9

R122

Q13

TS2C89

Q18

CR8

R67

C87

Q2

R50

C94

R37

DS1

R132

BA

C86

R129
R120

R123

U6

C53

R136

TRM10AJ.SCh > PC-1960-D

TRM10AN.SCh > PC-1960-E

HAFLER

PC-1960-E

12/15/98

– 14 –

P ARTS LIST

DESIGNATOR VALUE PART #

ALL RESISTORS IN OHMS

R1 1.0K OHM 1/10W 1% RM/10-1001B
R10 47K OHM 1/10W 5% RM/10-473B
R100 10K OHM 1/10W 1% RM/10-1002B
R101 9.09KOHM 1/10W 1% RM/10-9091B
R102 1M OHM 1/10W 5% RM/10-105B
R103 10K OHM 1/10W 1% RM/10-1002B
R104 13K OHM 1/10W 5% RM/10-133B
R107 10K OHM 1/10W 1% RM/10-1002B
R109 14K OHM 1/10W 1% RM/10-1402B
R11 1.0K OHM 1/10W 1% RM/10-1001B
R110 14K OHM 1/10W 1% RM/10-1402B
R111 14K OHM 1/10W 1% RM/10-1402B
R112 13K OHM 1/10W 5% RM/10-133B
R113 10K OHM 1/10W 1% RM/10-1002B
R114 9.09KOHM 1/10W 1% RM/10-9091B
R12 10K OHM 1/10W 1% RM/10-1002B
R120 10K OHM 1/10W 1% RM/10-1002B
R121 620 OHM 1/10W 5% RM/10-621B
R122 620 OHM 1/10W 5% RM/10-621B
R123 1.74K OHM 1/10W 1% RM/10-1741B
R124 RES 0 OHM 1/4W RMP/4-0000-03
R125 RES 0 OHM 1/4W RMP/4-0000-03
R127 10K OHM 1/10W 1% RM/10-1002B
R129 100 OHM 1/10W 5% RM/10-101B
R13 470K OHM 1/10W 5% RM/10-474B
R130 8.25K OHM 1/10W 1% RM/10-8251B
R132 1.74K OHM 1/10W 1% RM/10-1741B
R136 POT 5K RV-502Q
R137 2.61K OHM 1/10W 1% RM/10-2611B
R14 100 OHM 1/4W 5% RM/4-101C
R145 10M OHM 1/10W 5% RM/10-106B
R146 10K OHM 1/10W 1% RM/10-1002B
R147 6.81K OHM 1/10W 1% RM/10-6811B
R15 3.3M OHM 1/10W 5% RM/10-335B
R156 10K OHM 1/10W 1% RM/10-1002B
R157 1.33K OHM 1/4W 1% RM/4-1331C
R158 1.33K OHM 1/4W 1% RM/4-1331C
R16 4.75K OHM 1/10W 1% RM/10-4751B
R164 8.25K OHM 1/10W 1% RM/10-8251B
R17 10K OHM 1/10W 1% RM/10-1002B
R18 100K OHM 1/10W 5% RM/10-104B
R19 604K OHM 1/10W 1% RM/10-6043B
R2 1.0K OHM 1/10W 1% RM/10-1001B
R20 100K OHM 1/10W 5% RM/10-104B
R21 2.2M OHM 1/10W 5% RM/10-225B
R22 100K OHM 1/10W 5% RM/10-104B
R23 56K OHM 1/10W 5% RM/10-563B
R24 1.0K OHM 1/10W 1% RM/10-1001B
R25 10K OHM 1/10W 1% RM/10-1002B
R26 1M OHM 1/10W 5% RM/10-105B
R27 121 OHM 1/10W 1% RM/10-1210B
R278 510 OHM 1/10W 5% RM/10-511B
R28 121 OHM 1/10W 1% RM/10-1210B
R29 KNOB 2-3 WAY CROSSOVER KN-1824-A
R29 POT QUAD 9MM 20K RV-203Q
R3 1.0K OHM 1/10W 1% RM/10-1001B
R30 100 OHM 1/4W 5% RM/4-101C
R31 300 OHM 1/10W 5% RM/10-301B
R32 47K OHM 1/10W 5% RM/10-473B
R33 4.75K OHM 1/4W 1% 1206 RM/4-4751C
R34 2K OHM 1/4W 1% RM/4-2001C
R35 820 OHM 1/4W 5% RM/4-821C
R36 3.3M OHM 1/10W 5% RM/10-335B
R37 10 OHM 1/10W 5% RM/10-100B
R38 300 OHM 1/10W 5% RM/10-301B
R39 300 OHM 1/10W 5% RM/10-301B
R4 47K OHM 1/10W 5% RM/10-473B
R40 20.0K OHM 1/10W 1% RM/10-2002B
R41 4.75K OHM 1/4W 1% RM/4-4751C

R42 47K OHM 1/10W 5% RM/10-473B
R43 1.0K OHM 1/10W 1% RM/10-1001B
R44 16.2K OHM 1/10W 1% RM/10-1622B
R45 1.0K OHM 1/10W 1% RM/10-1001B
R46 RES 28K OHM 1/4W 1% RMP/4-2802-04
R47 2.2M OHM 1/10W 5% RM/10-225B
R48 28K OHM 1/10W 1% RM/10-2802B
R49 1.74K OHM 1/10W 1% RM/10-1741B
R5 1.0K OHM 1/10W 1% RM/10-1001B
R50 5.11K OHM 1/4W 1% RM/4-5111C
R51 1.74K OHM 1/10W 1% RM/10-1741B
R52 3.3M OHM 1/10W 5% RM/10-335B
R53 2K OHM 1/4W 1% RM/4-2001C
R54 3.3M OHM 1/10W 5% RM/10-335B
R55 300 OHM 1/10W 5% RM/10-301B
R56 243 OHM 1/4W 1% RM/4-2430C
R57 470K OHM 1/10W 5% RM/10-474B
R58 POT 2K TRIM RV-202
R59 1.74K OHM 1/10W 1% RM/10-1741B
R6 100 OHM 1/10W 5% RM/10-101B
R60 300 OHM 1/10W 5% RM/10-301B
R61 14K OHM 1/10W 1% RM/10-1402B
R62 14K OHM 1/10W 1% RM/10-1402B
R63 300 OHM 1/10W 5% RM/10-301B
R64 14K OHM 1/10W 1% RM/10-1402B
R65 10K OHM 1/10W 1% RM/10-1002B
R66 1.74K OHM 1/10W 1% RM/10-1741B
R67 1.0K OHM 1/10W 1% RM/10-1001B
R68 100 OHM 1/4W 5% RM/4-101C
R69 2.0K OHM 1/10W 1% RM/10-2001B
R7 100 OHM 1/10W 5% RM/10-101B
R70 280 OHM 1/10W 1% RM/10-2800B
R71 10 OHM 1/10W 5% RM/10-100B
R72 100 OHM 1/4W 5% RM/4-101C
R73 10K OHM 1/10W 1% RM/10-1002B
R74 4.75K OHM 1/10W 1% RM/10-4751B
R75 4.75K OHM 1/10W 1% RM/10-4751B
R78 680 OHM 1/10W 5% RM/10-681B
R8 POT 2K TRIM RV-202
R80 300 OHM 1/10W 5% RM/10-301B
R81 300 OHM 1/10W 5% RM/10-301B
R82 232K OHM 1/10W 1% RM/10-2323B
R83 243 OHM 1/4W 1% RM/4-2430C
R84 100 OHM 1/10W 5% RM/10-101B

R85 8.25K OHM 1/10W 1% RM/10-8251B
R86 RES 10 OHM 1W RM1-100-012
R9 POT 2K TRIM RV-202
R98 8.25K OHM 1/10W 1% RM/10-8251B
RV1 KNOB 2-3 WAY CROSSOVER KN-1824-A
RV1 DUAL 5K LINEAR RV-502DPA
C1 10UF 16V CER-106SM
C10 10PF 50V CDS-100CAAA
C11 10UF 16V CER-106SM
C12 .1UF 50V CYV-104
C13 CAP 3300UF 35V CERS-338B
C14 .47UF 50V CYV-474
C15 .1UF 50V CDS-104CBBB
C16 .1UF 50V CDS-104CBBB
C17 .1UF 50V CDS-104CBBB
C18 .1UF 50V CDS-104CBBB
C19 .1UF 50V CDS-104CBBB
C2 CAP 3300UF 63V CERS-338E
C20 .1UF 50V CDS-104CBBB
C21 10PF 50V CDS-100CAAA
C22 .47UF 50V CYV-474
C23 .47UF 50V CYV-474

C24 .1UF 50V CDS-104CBBB
C25 .1UF 50V CDS-104CBBB
C26 47PF 100V CDS-470DAAA
C27 .1UF 50V CDS-104CBBB
C28 10UF 16V CER-106SM

– 15 –

C29 10UF 16V CER-106SM
C3 .1UF 50V CYV-104
C30 10UF 16V CER-106SM
C31 .1UF 50V CDS-104CBBB
C32 CAP 3300UF 63V CERS-338E
C33 100PF 50V CDS-101CAAA
C34 47PF 100V CDS-470DAAA
C35 CAP 3300UF 35V CERS-338B
C36 .1UF 50V CYV-104
C37 CAP 3300UF 63V CERS-338E
C38 47PF 100V CDS-470DAAA
C39 47PF 100V CDS-470DAAA
C4 .1UF 50V CYV-104
C40 220PF 50V CDS-221CAAA
C41 220PF 50V CDS-221CAAA
C42 .1UF 50V CYV-104
C43 .01UF 50V CDS-103CBBB
C44 100PF 50V CDS-101CAAA
C45 .1UF 50V CYV-104
C46 .22UF 50V CYV-224
C47 .1UF 50V CYV-104
C48 .1UF 50V CYV-104
C5 .1UF 50V CDS-104CBBB
C51 .47UF 50V CYV-474
C52 .47UF 50V CYV-474
C53 .1UF 50V CDS-104CBBB
C55 .1UF 50V CDS-104CBBB
C56 .1UF 50V CDS-104CBBB
C57 .1UF 50V CDS-104CBBB
C58 .1UF 50V CDS-104CBBB

C59 .01UF 50V CDS-103CBBB
C6 220PF 50V CDS-221CAAA
C64 .22UF 50V CYV-224
C7 220PF 50V CDS-221CAAA
C72 .1UF 50V CYV-104
C73 1UF 50V CER-105CSM
C74 1UF 50V CER-105CSM
C8 CAP 3300UF 63V CERS-338E
C84 10UF 16V CER-106SM
C85 47UF 16V CER-476SM
C86 1UF 50V CER-105CSM
C87 120PF 50V CDS-121CAAA
C88 120PF 50V CDS-121CAAA
C89 1UF 50V CER-105CSM
C9 .1UF 50V CDS-104CBBB
C93 10UF 16V CER-106SM
C94 10UF 16V CER-106SM
CR1 DIO BYV 28-150 SS-176-059
CR10 BRIDGE RECTIFIER 8A SS-0799-068
CR11 DIO DUAL BAV99L SS-260SM
CR12 DIO DUAL BAV99L SS-260SM
CR14 DIO ZENER MMBZ5240BL SS-1052
CR15 DIO DUAL BAV99L SS-260SM
CR16 BRIDGE RECTIFIER 8A SS-0799-068
CR17 DIO BYV 28-150 SS-176-059
CR18 DIO ZENER MMBZ5240BL SS-1052
CR19 DIODE ZENER

MMBZ5231BLT1 SS-0775
CR2 DIO MMBD914L SS-803SM
CR20 DIODE ZENER

MMBZ5231BLT1 SS-0775
CR3 DIO MMBD914L SS-803SM
CR4 DIO DUAL BAV99L SS-260SM
CR5 DIO MMBD914L SS-803SM
CR6 DIO MMBD914L SS-803SM
CR7 DIO MMBD914L SS-803SM
CR8 GREEN LED SS-2428-054
CR9 DIO MMBD914L SS-803SM
Q11 XSTR MMBT5088L NPN SS-0114
Q12 XSTR MMBT5088L NPN SS-0114
Q13 XSTR MMBT3904LT1 NPN SS-0792
Q17 XSTR MMBT3904LT1 NPN SS-0792
Q18 XSTR MMBT3906LT1 PNP SS-0791

Q19 XSTR NPN MPSA06 SS-102A
Q2 XSTR MMBT3904LT1 NPN SS-0792
Q2 Regulator LM317 WP-2350
Q21 XSTR MPS-A56 SS-101A
Q23 XSTR MMBT3906LT1 PNP SS-0791
Q3 Regulator LM337 WP-2348
Q37 XSTR MPS6521 SS-209
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
U10 OPAMP TL072CD SS-143SM
U16 OPAMP TL072CD SS-143SM
U2 OPAMP TL072CD SS-143SM
U112 OPAMP DUAL LM833D SS-187SM
U3 OPAMP DUAL LM833D SS-187SM
U4 OPAMP DUAL LM833D SS-187SM
U6 OPAMP DUAL LM833D SS-187SM

U15 COMPTR DUAL LM393D SS-207SM
J6 CONN IEC POWER INLET CC-1174
J1 CONN XLR NEUTRIK NC3FAH-2-0 CC-2339
J8 CONN XLR NEUTRIK NC3FAH-2-0 CC-2339
J9 HEADER 4 SOCKET CC-2352
J10 HEADER 6 SOCKET CC-2353
J5 4 AMP 3AG SLO-BLO FUSE FS-004SB
J5 FUSE HOLDER CAP 3AG FS-1175
J5 FUSE HOLDER BODY PC MOUNT FS-1176
TP1 SH 2X3 JUMPER CC-648
TP1 HDR 6 PIN DUAL ROW CC-673
TP2 RCA JACK GOLD TWIN CCH-228
TS2 THERMISTOR 10K EPOXY SS-0426-066
CHASS1 HARNESS P1000 CHASSIS GND FA-1401-A
DS1 4 POS DIP SWITCH SW-1649

Transformer TT-2327-D
IEC Linecord WIR9856
10" Woofer FG26388WP
12" Woofer FG26394WP
Plastic Foot SHW10459
Neoprene Pad HDW10441
1/4"-20x2" Phillips Screw HDW10460

MODEL TRM10sCE/TRM12sCE 230V Differences

J5 Fuse Holder Cap 5X20mmFS-1269-A

!

!

J5 1.25A SLO-BLO Fuse FS-1474-A
R126 RES 0 OHM 1/4W RMP/4-0000

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

European Linecord <HAR> WIR10138

!

!
!

!

!
!

!
!

!
!

!

!

!

!

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.

!

– 16 –

BUFFER/
GAIN TRIM
U4B, R137,

R74, R136

PHASE CONTROL CIRCUIT BUFFER / GAIN TRIM

CIRCUIT

-180º PHASE
SHIFT

U6A
R100, R107,
R101, R132,

C86, C73,

D53

-90º PHASE
SHIFT

U6B, R113, R120,

R114, R123,

C89, C74,

D54

DS2

2ND ORDER VARIABLE LP

U112B

R29A, R85

R29B, R98

C64, C48

2ND ORDER

SUBSONIC HP

U2A
C36, C42
R44, R82

2ND ORDER VARIABLE LP

U112A
R29C, R164
R29D, R130

C46, C45

CLASS G AMPLIFIER

FILTER CIRCUITS

TRM10S/12S FUNCTIONAL BLOCK DIAGRAMS

Qualified Service Personnel Only

!

Input circuit

The stereo input signals are connected to the amplifier
through balanced XLR connectors J8 and J1, or
unbalanced RCA connector TP2. Unbalanced operation
can be selected with switch DS1, which grounds the RCA
shell through R37. Input buffers U1 and U10 provide a

RCH

INPUT

J8
TP2
R10

R4

stable input impedance, dominated by R10, R4, R42, and
R32. The left and right balanced summing amplifiers U4A
and U3A sum the inverting and non-inverting signals to
form unbalanced right and left channel outputs RCH and
LCH. The Common Mode Rejection Ratio (CMRR) of each
channel is optimized with trimpots R8 and R58.

LCH

INPUT

J1
TP2
R42
R32

Mono Sum/Gain Circuit

Left and right input signals LCH and RCH are summed to mono
through R49 and R51. The mono signal is then attenuated in two
stages with dual potentiometer RV1 which is accessible from the rear
panel heatsink and serves as the gain control. R56 and R83 determine
the maximum achievable attenuation level. R59 and R66 help to
reduce the tracking errors of RV1 due to absolute resistance. Buffer
U3B unloads the attenuators and provides 6dB of gain with R25 and
R73.

DS1
R37

RCH
LCH

NON-INV
BUFFER

U1A

BAL / UNBAL

INV

BUFFER

U1B

NON-INV
BUFFER

U1OA

INV

BUFFER

U1OB

L/R SUM
R49, R51

INPUT CIRCUIT

CMRR

CMRR

R8

R8

CMRR

R58

MONO SUM / GAIN CIRCUIT

SUB A TTN

R59, R56

RV1B

R66, R83

RV1A

RCH

BAL

SUMMING

AMP
U4A

R109, R110,

R111,R112

LCH
BAL
SUM
AMP
U3A

R64 , R61

R104 , R62

RCH

LCH

GAIN

U3B
R25
R73

Phase Control Circuit

The output signal of U3B goes directly to U4B if DS2 is left open
(0 degrees phase shift). If only DS2 is closed, the signal goes through 2
cascaded phase shift stages built around U6A and U6B, and
experiences a 270 degree phase shift. Additionally closing DS3 causes
the phase shift to be 180 degrees. Adding another closed switch DS4
results in only 90 degrees of phase shift. DS2, DS3, and DS4 are
labeled 2,3, and 4 respectively on the rear panel heatsink.

Buffer/Gain Trim Circuit

U4B works as a buffer, and as a factory gain trim using trimpot R136.
The voltage gain of the stage is (R74+R136)/R137.

Filter Circuits

TU112A and U112B form two cascaded 2nd order variable low pass
crossover filters, for an overall 4th order 24dB/octave Linkwitz-Riley
response. The quad potentiometer R29 is accessible from the rear
panel heatsink and indicates the 40Hz to 140Hz range of the variable
Low-Pass crossover. Following these circuits is a 2nd order subsonic
High-Pass filter at U2A. The signal then connects to the Class-G
amplifier.

– 17 –

!

Class-G Trans•ana Amplifier

SOFT START CIRCUIT

ON / OFF

CR5
CR6
CR3

ON

INDICATOR

LED

Q2
R50
CR8

R13
C93
C94

Q8

SOFT
START
DELAY

The transistor Q8 is configured as a
switch, which controls the current
source Q5, of the input differential
amplifier Q11 and Q12. If the power
On/Off, Signal Sensing, and Thermal
Protection circuits have all stopped
pulling to -15V, the turn-on process
begins, and the voltage at the emitter
of O8 slowly ramps up to zero Volts
according to the charging time of soft
start components R13, C93, and C94.
15V is divided between R40 and R65,
and imposed across the base-emitter
of Q5 and R35, causing current
source Q5 to turn the amplifier on.

The input signal is connected across
the differential amp transistors Q11
and Q12. U2B is configured as a DC­servo integrater to null any DC at the
output.

AMPLIFIER

DC

OFFSET

U2B, R47, C22

R13
C93

SOFT

C94

START

Q8

+ 15V

I MIRROR

Q6, Q7

DIFF
AMP

Q11, Q12

I
SOURCE
R40, R65

Q5,R35

- 15V

FB
R46
C10

Qualified Service Personnel Only

+HV

POS PRE-

DRIVER

Q18

<out

NEG PRE-

DRIVER

Q17

BIAS

Q37

R9

POS

G

DRIVER

Q13

OUT

DRIVER

Q19
Q21

NEG

G

DRIVER

Q23

-HV

POS

G

Q9

POS
OUT

Q4

NEG
OUT
Q10

NEG

G

Q1

+LV

CR1

CR17

-LV

LOCAL

FB
C47
R86

out

The output of the differential amplifier
is fed to the positive pre-driver Q18,
and to the curent mirror which mirrors the inverted input current of Q6 into O7 and delivers it to the negative pre-driver
Q17. The pre-driver current is split between the three current paths of the bias and the driver circuit according to the factory
bias setting of trimpot R9, and the temperature of Q37. Q37 is thermally linked to the heatsink, and compensates for the
gate-voltage temperature coefficient of the output MOSFETs. Q19 drives the positive output MOSFET Q4, and Q21 drives the
negative output MOSFET Q10. Local feedback components C47 and R86 help to stabilize this output stage.

At low output voltages, current flows to the woofer from the lower voltage rail +LV or -LV through the diodes CR1/CR17 and
output MOSFETs Q4/Q10. When the output voltage approaches or exceeds these lower voltage rails, output current flows
from the higher voltage rail +HV or -HV through CLASS-G MOSFET Q9/Q1 and output MOSFETS Q4/Q10.

Positive G driver Q13 turns on class G MOSFET Q9 when the base-emitter voltage exceeds 0.7V. This occurs when
(OUT - 1.4 - 5.1V) - (+LV - 0.7 - 10) > 0.7V, which reduces to OUT > +LV - 3.5V. A similar equation can be applied to the
negative class G driver Q23. The resulting behavior can be observed as the class G rail on the source of the output MOSFET
tracking 3.5V higher (or lower) than the output signal.

Soft Start Circuit

The amplifier soft start circuit is controlled by three On/Off circuits:
Power On/Off, Signal Sensing, and Thermal Protection. The "diode
OR" connection of CR5, CR6, and CR3 causes the amplifier to turn off
if power On/Off is low or Signal Sensing is low or the Thermal Protec­tion is low. The amplifier will turn on only if all these circuit outputs
are high. In this all-high condition, CR5, CR6, and CR3 are open
circuited or back-biased, allowing R13 to turn on Q2 and Q8, illumi­nating LED CR8 and turning on the amplifier. Q8 is turned on slowly,
according to the time constant of R13 and C93 and C94. This "soft
start" behavior eliminates audible turn on transients.

– 18 –

Power On/Off Circuit

POWER ON / OFF

REFERENCE

CR15

R18

COMPARATOR

U15A

ON / OFF

CR5

AC POWER
RECTIFIER

CR2,CR7
R12, C31
R19, R20

THERMAL PROTECTION

TEMP

TS2, R147

COMPARATOR

U15B

R22, R23

ON / OFF

CR6

The power on/off circuit is designed to turn the amplifier on slowly and
off quickly. When AC power is initially applied to the subwoofer, AC
signals on the secondary of the power transformer are negatively
rectified through CR2 and CR7 into peak holding capacitor C31, and
divided by R19 and R20. When the resulting DC voltage at pin 2 of
U15A is lower than the reference voltage of -1.4 at pin 3, the output of
U15 goes high, allowing the soft start circuitry to slowly turn on the
amplifier. When AC power is removed from the subwoofer, pin 2 very
quickly goes toward 0V and flips U15A low to -15V, immediately
turning the amplifier off before the power supplies collapse.

Signal Sensing Turn-On Circuit

The amplifier will not turn on until an input signal is detected. The
first stage of the detection circuit amplifies the WOOFER signal by
40dB - to insure that even the smallest input signal is detected - and
high pass filters it to eliminate DC offset errors. This amplified signal
is negatively rectified by CR9 and held by C85. When the voltage at
pin 6 of U16B goes lower than the -0.15V reference at pin 5, the
output goes high, allowing the soft start circuitry to turn the amplifier
on. After signal is removed, the 470-second time constant of C85 and
R145 will discharge slowly towards 0V until it is higher than -0.15V,
causing U16B to go low to -15V, turning the amplifier off.

Qualified Service Personnel Only

!

SIGNAL SENSING TURN-ON

REFERENCE

R103, R84

C85

SIGNAL AMPLIFIER

U16A
R57, R75
C28, C84

SIGNAL

RECTIFIER

AND HOLD
CR9, R145

COMP

U16B

ON / OFF

CR3

Thermal Protection

The thermal protection turns off the amplifier when the heatsink
reaches an excessively high temperature. This condition is detected by
the NTC (Negative Temperature Coefficient) thermistor TS2. At higher
temperatures, TS2 has a lower resistance - causing a higher voltage at
pin 6 of U15B. When this voltage exceeds the reference voltage at pin
5, the output of U15B goes low to -15V and turns the amplifier off.

– 19 –

CIRCUIT CALIBRATION

!

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 TP1 and connect an ammeter across the exposed pins. Adjust trimpot R9 fully counter-clockwise
before reapplying power to the unit. After the Soft Start turn-on has settled, note the ammeter reading. Adjust R9 until an
additional 50mA is added to the ammeter reading. Replace jumper TP1. If the green power LED is not illuminated, apply a low
frequency input signal to the amplifier input to activate the signal sensing turn on circuit. Be sure to remove the signal before
adjusting the bias.

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

Qualified Service Personnel Only

– 20 –

AMPLIFIER REPLACEMENT

1. Remove (10) screws from amplifier using a Phillips screwdriver

2. Remove amplifier from enclosure

3. Disconnect the (2) speaker wires (FIG. 1)

4. Disconnect the transformer primary molex (FIG. 1)

5. Disconnect the transformer secondary molex (FIG. 1)

6. Follow steps 1-5 in reverse order to install amplifier

!

CAUTION: Reconnect wires as indicated in diagram!

Qualified Service Personnel Only

!

FIG. 1

Amplifier Replacement

WOOFER REPLACEMENT

1. Remove (8) screws from woofer using a Phillips screwdriver

2. Remove woofer from enclosure

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

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

!

CAUTION: Reconnect wires as indicated in diagram!

FIG. 2

Woofer Replacement

– 21 –

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 Subwoofer 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

– 22 –

®

HAFLER

A DIVISION OF

ROCKFORD CORPORATION

546 SOUTH ROCKFORD DRIVE

TEMPE, ARIZONA 85281 U.S.A.

1-888-HAFLER1 / 602-967-3565

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.

LIT10440
3/99 E.W.R.

MADE IN THE USA