Electro-Voice AC one Service manual

SERVICE MANUAL

ACONE

AUDIO CONTROLLER

IMPORTANT SAFETY INSTRUCTIONS

The lightning flash with arrowhead symbol, within an equi­lateral triangle is intended to alert the user to the presence
of uninsulated “dangerous 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 to the presence of important
operating and maintance (servicing) instructions in the
literature accompanying the appliance.

1. Read these instructions.

2. Keep these instructions.

3. Heed all warnings.

4. Follow all instructions.

5. Do not use this apparatus near water.

6. Clean only with a damp cloth.

7. Do not block any of the ventilation openings.
Install in accordance with the manufactures instructions.

8. Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus that produce heat.

9. Only use attachments/accessories specified by the manufacturer.

10. Refer all servicing to qualified service personnel. Servicing is required when the apparatus has been
damaged in any way, such as power-supply cord or plug is damaged, liquid has been spilled or objects have fallen
into the apparatus, the apparatus has been exposed to rain or moisture, does not operate normally, or has
been dropped.

For US and CANADA only:

Do not defeat the safety purpose of the grounding-type plug. A grounding type plug has two blades and a third grounding prong.
The wide blade or the third prong are provided for your safety. When the provided plug does not fit into your outlet, consult an
electrican for replacement of the absolete outlet.

IMPORTANT SERVICE INSTRUCTIONS

CAUTION: These servicing instructions are for use by qualified personnel only. To reduce the

risk of electric shock, do not perform any servicing other than that contained in the
Operating Instructions unless you are qualified to do so. Refer all servicing to
qualified service personnel.

1. Security regulations as stated in the EN 60065 (VDE 0860 / IEC 65) and the CSA E65 - 94 have to be obeyed when
servicing the appliance.

2. Use of a mains separator transformer is mandatory during maintenance while the appliance is opened, needs to be
operated and is connected to the mains

3. Switch off the power before retrofitting any extensions, changing the mains voltage or the output voltage.

4. The minimum distance between parts carrying mains voltage and any accessible metal piece (metal enclosure),
respectively between the mains poles has to be 3 mm and needs to be minded at all times.
The minimum distance between parts carrying mains voltage and any switches or breakers that are not connected
to the mains (secondary parts) has to be 6 mm and needs to be minded at all times.

5. Replacing special components that are marked in the circuit diagram using the security symbol (Note) is only permissible
when using original parts.

6. Altering the circuitry without prior consent or advice is not legitimate.

7. Any work security regulations that are applicable at the location where the appliance is being serviced have to be strictly
obeyed. This applies also to any regulations about the work place itself.

8. All instructions concerning the handling of MOS - circuits have to be observed.

Note:

SAFETY COMPONENT (HAS TO BE REPLACED WITH ORIGINAL PART ONLY)

1-2

WARRANTY (Limited)

Electro-Voice products are guaranteed against malfunction due to defects in materials or workmanship for a specified
period, as noted in the individual product-line statement(s) below, or in the individual product data sheet or owner’s
manual, beginning with the date of original purchase. If such malfunction occurs during the specified period, the
product will be repaired or replaced (at our option) without charge. The product will be returned to the customer
prepaid.

Exclusions and Limitations: The Limited Warranty does not apply to: (a) exterior finish or appearance; (b) certain
specific items described in the individual product-line statement(s) below, or in the individual product data sheet or
owner’s manual; © Malfunction resulting from use or operation of the product other than as specified in the product
data sheet or owner’s manual; (d): malfunction resulting from misuse or abuse of the product; or (e): malfunction
occurring at any time after repairs have been made to the product by anyone other than Electro-Voice or any of its
authorized service representatives.

Obtaining Warranty Service: To obtain warranty service, a customer must deliver the product, prepaid, to
Electro-Voice or any of its authorized service representatives together with proof of purchase of the product in the
form of a bill of sale or receipted invoice. A list of authorized service representatives is available from Electro-Voice
at 600 Cecil Street, Buchanan, MI 49107 (616-695-6831) and/or Electro-Voice West at 9130 Glenoaks Boulevard,
Sun Valley, CA 91532 (213-875-1900).

Incidental and Consequential Damages Excluded: Product repair or replacement and return to the customer are
the only remedies provided to the customer. Electro-Voice shall not be liable for any incidental or consequential
damages including, without limitation, injury to persons or property or loss of use. Some states do not allow the
exclusion or limitation of incidental or consequential damages so the above limitation or exclusion may not apply to
you. Other Rights: This warranty gives you specific legal rights, and you may have other rights which vary from state
to state.

Electro-Voice Electronics are guaranteed against malfunction due to defects in materials or workmanship for a
period of three (3) years from the date of original purchase. Additional details are included in the Uniform Limited
Warranty Statement.

Specifications subject to change without notice.

600 Cecil Street, Buchanan, Michigan 49107, Phone [phone], Fax: [phone]

TELEX/EVI Audio Canada, 705 Progress Ave. Unit 46 Toronto, Onatario, M1H 2x1, Canada , Phone: [phone], Fax: [phone]
TELEX Communications A.G., Keltenstrasse 11, CH-2563 IPSACH, Switzerland, Phone: [phone], Fax: [phone]
EVI Audio Deutschland GmbH, Hirschberger Ring 45, D-94302, Straubing, Germany, Phone: [phone], Fax: [phone]
EVI Audio France S.A., Parc de Courcerin-Allee Lech Walesa, Lognes, f-77185 Marne La Vallee, France, Phone: [phone], Fax: [phone]
EVI Audio Japan Ltd., 2-5-60 Izumi, Suginami-ku, Tokyo, Japan 168, Phone: [phone], Fax: [phone]
EVI Audio (Aust.) Pty., Unit 23, Block C, Slough Business Park, Slough Ave., Silverwater, N.S.W 2141, Australia, Phone [phone],
Fax: [phone]
EVI Audio (Hong Kong) Limited, Unit E & F, 21 /F., Luk Hop Industrial Bldg., 8 Luk Hop St., San Po Kong, Kowloon, Hong Kong, Phone: [phone],
Fax: [phone]

(357 648 ) 12. 10 .1999

Technische Informationen

Architects and engineers
specifications

ACONE

AUDIO CONTROLLER

Beschreibung

Höchste Anforderungen an Schalldruck, Reichweite und Soundqualität
lassen sich in Audioanlagen nur mit aktiven Mehrweglautsprechersy­stemen realisieren bei denen die unterschiedlichen Frequenzbereiche
des Audiosignals jeweils getrennt verstärkt und wiedergegeben wer­den. Das vergleichsweise beste Preis-Leistungsverhältnis bieten Aktiv
2-Weganlagen mit Subwoofern. Der Bassanteil des Audiosignals wird
über die Subwoofer wiedergegeben, der Mittel-Hochtonanteil und die
Vocals über hochwertige Fullrangeboxen.

Ein wesentlicher Vorteil von Aktiv 2-Weganlagen mit Subwoofern liegt
unter anderem darin begründet, daß die Vocals nicht auf verschiedene
Lautsprechersysteme aufgeteilt sind. Dadurch ist eine problemlose
Justierung des Soundsystems möglich. Komplizierte Einmessarbeiten
sind - im Gegensatz zu aktiven 3-Weg oder 4-Wegsystemen- nicht
notwendig.

Auf kleinen Bühnen oder in kleineren Räumen kann mit einem Mono­Subwoofer gearbeitet werden weil die Bässe unter derartigen Bedin­gungen kaum geortet werden können. Auf größeren Bühnen sind
getrennte Subwoofer für beide Seiten unerläßlich, weil sonst zu große
Lautstärkeunterschiede zwischen den Bässen und Höhen auf der
Bühne und an verschiedenen Zuhörerplätzen auftreten können. Ein
zentral angeordneter Mono-Subwoofer kann natürlich vorteilhaft als
Ergänzung eingesetzt werden.

Der AC
systeme mit Subwoofern entwickelt. Als Leistungsverstärker werden
in derartigen Systemen professionelle lineare Leistungsendstufen wie
beispielsweise Electro-Voice P1200, P2000, P3000 oder Q44, Q66
eingesetzt. Beim Einsatz von Prozessorendstufen wie beispielsweise
Electro-Voice P1250 wird der Endstufenprozessorteil einfach ausge­schaltet.

Die Installation und Bedienung des AC
problemlos, der Anwender braucht sich nicht mit der komplexen Ma­terie von Weichenfunktionen und Entzerrern zu beschäftigen. Alle
Regler zur Anpassung an die Raumakustik und die Lautsprecherka­binette sind auf der Frontseite zugänglich, die komplizierte elektroni­sche Verknüpfung der Einstellungen wird automatisch intern realisiert.
Die neuentwickelte PowerMax12 Weichenfunktion (Patents Pending)
nutzt Endstufenleistung und die Übertragungseigenschaften der Bo­xen optimal. Dadurch werden klanglich erheblich bessere Ergebnisse
mit geringerem Aufwand erzielt als mit herkömmlichen Frequenzwei­chen oder Controllern.

Der AC
2-Weg Instrumentalanlagen für Keyboards, Bass und Drums und
vermeidet durch die PowerMax12 Weichenfunktion den in herkömm­lichen aktiven Instrumentalanlagen häufig beklagten „lack-of-punch­and-definition“.

Mit dem erstklassigen Dynamikbereich von über 116dB, einem extrem
niedrigen Geräuschpegel und herausragendem Preis-Leistungsver­hältnis ist der Einsatz des AC
Anwendungen in der Festinstallation eine bevorzugte Alternative zu
herkömmlichen Frequenzweichen und Controllern.

Controller wurde zum Aufbau höchstwertiger Aktiv-2-Weg-

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Controllers ist vollkommen

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Controller eignet sich auch exzellent zum Aufbau von Aktiv

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Controllers auch in kritischen

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Description

Meeting the highest requirements of modern audio applications - espe­cially, when it comes to sound pressure level, coverage and sound
quality - is only possible when using active multi-component loudspea­ker systems which provide the possibility to separately amplify and
reproduce the audio signal’s individual frequency ranges. Active 2-way
installations with additional sub woofer systems probably offer the best
price-performance ratio. The low frequency range of the audio signal is
reproduced by the sub woofers while high-quality full-range cabinets
take care of the Mid/Hi frequencies and vocals.

One of the essential advantages when using active 2-way systems with
additional sub woofers is the fact that the vocals are not divided between
several speaker systems. This, in return, offers more convenience when
adjusting the sound system. Unlike than with active 3- or 4-way confi­gurations – difficult analyzing and measuring of sound fields is unne­cessary.

Since locating low-frequency sound is merely impossible, simply using
monaural sub woofers is absolutely sufficient for smaller stages or
rooms. On wider stages it is indispensable to use individual sub woofer
systems for both sides. Otherwise, the level differences between bass
and treble would result in audible degradation of the overall sound. Of
course, adding a centrally located sub woofer might additionally impro­ve the sound quality.

The AC
ce installations that employ active 2-way systems plus sub woofers.
Applications like these also mostly incorporate professional linear po­wer amplifiers like the Electro-Voice P1200, P2000, P3000 or Q44, Q66.
When using processor controlled power amplifiers like the Electro-Voice
P1250, the processor section is simply switched off.

Installing and operating the AC
the user does not need to know any complex detail about crossover
functions and equalization. All controls for matching the sound to
different acoustic conditions and loudspeaker systems are located on
the front panel. Difficult tasks - like electronic signal routing and settings
for instance - are automatically carried out inside the appliance. The
newly designed PowerMax12 crossover function (patents pending)
optimally utilizes amplifier output power and loudspeaker transmission
capacities. Compared to conventional crossovers or controllers, this
results in an improved overall sound quality which is achieved with less
effort.

The AC
2-way instrument reinforcement applications for keyboards, E-bass and
drums. The PowerMax12 crossover function eliminates the often com­plained about “lack-of-punch-and-definition”, like it is common for con­ventional active musical instrument reinforcement systems.

Its excellent dynamic range of more than 116dB, the extremely low
noise level and the outstanding price-performance ratio makes the
AC

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over and controller solutions – even in the critical field of permanent
installation.

Controller has been designed to be used in high-performan-

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Controllers is easy as can be since

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Controller is also most suitable for integration in active

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Controller an advantageous alternative to conventional cross-

Description

Satisfaire aux exigences des applications audio modernes – surtout
lorsqu’il s’agit de pression sonore, de qualité sonore et de couverture
– n’est possible qu’en utilisant des systèmes de haut-parleurs actifs
multi-voies offrant la possibilité d’amplifier et de reproduire séparément
le signal audio de chaque bande de fréquences. Les installations
actives à deux voies avec sub-woofers offrent probablement le meilleur
rapport performance-prix. Les fréquences basses du signal audio sont
reproduites par les sub-woofers alors que des enceintes large bande
de qualité se chargent des fréquences médium/hautes et des voix.

Un des avantages essentiels offert par l’utilisation des systèmes actifs
à deux voies avec des sub-woofers supplémentaires est que les voix
ne sont pas réparties sur plusieurs systèmes de haut-parleurs. Ce qui
est beaucoup plus pratique pour le réglage de la sonorisation. Con­trairement aux configurations actives à 3 ou 4 voies, les mesures et
les analyses compliquées des champs sonores ne sont pas nécessai­res.
Pour les scènes ou les salles de petites dimensions, comme les sons
basses fréquences sont pratiquement impossibles à situer, il suffit
d’utiliser des sub-woofers mono. Pour les scènes plus grandes il est
absolument indispensable d’utiliser un système de sub-woofers
séparés pour chaque côté. Sinon, les différences de niveau entre les
basses et les aigus provoqueront une dégradation audible du son dans
son ensemble. Bien sûr, l’ajout d’un sub-woofer placé au centre
améliorera encore la qualité sonore.

Le contrôleur AC

a été conçu pour être utilisé dans des installations

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performantes employant des systèmes actifs à deux voies avec sub­woofers. De telles applications incluent fréquemment des amplifica­teurs de puissance linéaires professionnels comme les Electro-Voice
P1200, P2000, P3000 ou Q44, Q66. Lors de l’utilisation d’amplifica­teurs de puissance contrôlés par processeur comme le Electro-Voice
P1250, la section processeur est tout simplement désactivée.

L’installation et le maniement des contrôleurs AC

est aussi simple

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que possible, puisque l’utilisateur n’a besoin de connaître les détails
complexes des fonctions de Crossover, ou d’égalisation. Tous les
contrôles permettant d’adapter le son aux diverses conditions acou­stiques et aux divers systèmes de haut-parleurs se trouvent en face
avant. Les tâches difficiles – comme l’acheminement du signal élec­tronique et les réglages, par exemple - sont automatiquement pris en
charge en dehors de l’appareil. La fonction de Crossover, nouvelle­ment conçue, du PowerMax12 (brevet en cours) optimise la puissance
de sortie de l’amplificateur en fonction des caractéristiques du haut­parleur. Comparé aux Crossovers ou aux contrôleurs conventionnels,
le résultat est une qualité sonore globale améliorée qui est obtenue
avec moins d’efforts.

Le contrôleur AC

convient également parfaitement lorsqu’il est

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intégré dans des applications actives à 2 voies pour le renforcement
d’instruments, tels les claviers, les basses et les batteries électriques.
La fonction Crossover du PowerMax12 élimine le sempiternel
”manque-de-punch-et-de-définition”, commun aux systèmes actifs
conventionnels utiliser pour le renforcement des instruments de musi­que.

Son excellente dynamique, de plus de 116 dB, son niveau de bruit
extrêmement bas et son rapport performance-prix très attractif font du
contrôleur AC

une alternative avantageuse aux solutions de Cross-

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over et de contrôleurs conventionnels – même dans le domaine
critique des installations permanentes.

Technical Specifications AC

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All level and frequency controls in center position, Lo-EQ and Hi-EQ
controls at 0dB, MID-EQ control at -4dB, unless otherwise specified.
Note: 0dBu = 0.775V

Crossover

Mode 2-Way-Stereo + SUB Mono
Frequency, sweepable 45Hz ... 160Hz
Filter Type PowerMax12*

LO-Cut

Filter Type 12dB/octave
Frequency, sweepable 20Hz ... 100Hz

Equalization

LO-EQ 50Hz, Shelving, 0dB ... +12dB
MID-EQ 4kHz, Dip, -8dB ... 0dB
HI-EQ 15kHz, Lift, 0dB ... +8dB

Inputs A, B

Type Active Balanced, XLR-female
Input Impedance 20kOhm
Maximum Level +20dBu
Rated Level +6dBu
Gain Range -∞ ... + 6dB
Parallel Outputs A, B XLR-male

Outputs HI, LO, SUB

Type Active Balanced, XLR-male
Output Impedance 75 Ohm
Maximum Level + 20dBu
Rated Level + 6dBu
Gain Range -∞ ... + 6dB

Frequency Response,

-3dB ref.1kHz, Lo-Cut 20Hz 16Hz ... 150kHz

Nominal Gain
Maximum Gain

0dB

+12dB

Dynamic Range, +20dBu, noise A-weighted 117dB
THD+N,
THD+N,

20Hz ... 20kHz, +6dBu < 0.02%
typical, +6dBu

0.003%

Crosstalk <-80dB
Mute Switch Rejection
Level Control Attenuation

> 90dB

> 80dB

Power Requirements, 50Hz....60Hz,

voltage selector 100V ... 120V, 220V ... 240V

Power Consumption

17 W

Dimensions, (WxHxD), mm 483 x 43.6 x 226.5
Weight
Optional, input transformer

3.2 kg
NRS 90208

*Patents pending

Abmessungen / Dimensions (in mm)

WARRANTY (Limited)

Electro-Voice products are guaranteed against malfunction due to defects in materials or workmanship for a specified period, as
noted in the individual product-line statement(s) below, or in the individual product data sheet or owner’s manual, beginning with
the date of original purchase. If such malfunction occurs during the specified period, the product will be repaired or replaced (at
our option) without charge. The product will be returned to the customer prepaid.

Exclusions and Limitations: The Limited Warranty does not apply to: (a) exterior finish or appearance; (b) certain specific items
described in the individual product-line statement(s) below, or in the individual product data sheet or owner’s manual; ©
Malfunction resulting from use or operation of the product other than as specified in the product data sheet or owner’s manual;
(d): malfunction resulting from misuse or abuse of the product; or (e): malfunction occurring at any time after repairs have been
made to the product by anyone other than Electro-Voice or any of its authorized service representatives.

Obtaining Warranty Service: To obtain warranty service, a customer must deliver the product, prepaid, to Electro-Voice or any
of its authorized service representatives together with proof of purchase of the product in the form of a bill of sale or receipted
invoice. A list of authorized service representatives is available from Electro-Voice at 600 Cecil Street, Buchanan, MI 49107
(616-695-6831) and/or Electro-Voice West at 9130 Glenoaks Boulevard, Sun Valley, CA 91532 (213-875-1900).

Incidental and Consequential Damages Excluded: Product repair or replacement and return to the customer are the only
remedies provided to the customer. Electro-Voice shall not be liable for any incidental or consequential damages including,
without limitation, injury to persons or property or loss of use. Some states do not allow the exclusion or limitation of incidental
or consequential damages so the above limitation or exclusion may not apply to you. Other Rights: This warranty gives you
specific legal rights, and you may have other rights which vary from state to state.

Electro-Voice Electronics are guaranteed against malfunction due to defects in materials or workmanship for a period of three
(3) years from the date of original purchase. Additional details are included in the Uniform Limited Warranty Statement.

Specifications subject to change without notice.

600 Cecil Street, Buchanan, Michigan 49107, Phone [phone], Fax: [phone]

TELEX/EVI Audio Canada, 705 Progress Ave. Unit 46 Toronto, Onatario, M1H 2x1, Canada , Phone: [phone], Fax: [phone]
TELEX Communications A.G., Keltenstrasse 11, CH-2563 IPSACH, Switzerland, Phone: [phone], Fax: [phone]
EVI Audio Deutschland GmbH, Hirschberger Ring 45, D-94302, Straubing, Germany, Phone: [phone], Fax: [phone]
EVI Audio France S.A., Parc de Courcerin-Allee Lech Walesa, Lognes, f-77185 Marne La Vallee, France, Phone: [phone], Fax: [phone]
EVI Audio Japan Ltd., 2-5-60 Izumi, Suginami-ku, Tokyo, Japan 168, Phone: [phone], Fax: [phone]
EVI Audio (Aust.) Pty., Unit 23, Block C, Slough Business Park, Slough Ave., Silverwater, N.S.W 2141, Australia, Phone [phone],
Fax: [phone]
EVI Audio (Hong Kong) Limited, Unit E & F, 21 /F., Luk Hop Industrial Bldg., 8 Luk Hop St., San Po Kong, Kowloon, Hong Kong, Phone: [phone],
Fax: [phone]