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ELECTRO-VOICE Q66 Specifications

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Description

The Electro-Voice Q66 amplifier is a very

high-quality power amplifier designed to

elicit excellent performance from any

speaker system. Its low distortion and sub-

stantial headroom ensure that program ma-

terial will be accurately amplified.

Each channel of the Q66 delivers more

than 300-watts continuous average power

into 8 ohms, 500 watts into 4 ohms and

650 watts into 2 ohms over the full audio

frequency range. In the bridged mode, the

amplifier can deliver more than 1,200 watts

into 8 ohms and 1,700 watts into 4 ohms at

less than 1% THD. The power supply with

its large torodial transformer gives the am-

plifier impressive headroom and current out-

put capability.

The Q66 contains 20 high-power output de-

vices with 5,000 watts of dissipation capa-

bility. These devices are protected from over-

heating by two, three-speed temperature-sen-

sitive fans. The fans are quiet enough to per-

mit use of the Q66 in noise-sensitive appli-

cations such as recording studios and houses

of worship.

The output devices are mounted to two large,

extruded aluminum heat sinks that are engi-

neered to minimize thermal gradients and

allow the amplifier to operate safely into low-

impedance loads. The output devices have a

maximum junction temperature of 200

o

C

(392

o

F), so high operational temperatures

present no problems. The output devices are

mounted directly to the heat sinks without

mica insulators to ensure better dissipation

of heat.

The Q66 has sophisticated protection circuits

that guard it and the load from problems.

Protection circuits guard against overload,

over-temperature, shorted outputs, radio-fre-

quency interference and dc faults. The out-

put devices are protected against damage

from the reverse feeding of electrical energy

(back EMF) from the load and are switched

on via relays to avoid transients which could

damage speakers.

The Q66 has built-in limiters to protect

speakers from the deleterious effects of am-

plifier clipping. The limiter’s action is con-

trolled by very sophisticated input/output

comparators which are designed to preserve

the sonic integrity of the source.

The Q66 has electronically-balanced XLR-

type input and signal output connectors that

allow easy, problem-free connections and

signal routing. The amplifier has an input

routing switch that allows selection of either

normal dual-channel operation or parallel

mono operation, which routes an input to

both channels but still allows independent

level control.

The Q66’s professional Neutrik Speakon

®

output connectors provide sturdy, reliable

connections and allow use of heavy wire for

loss-free signal transmission. There are sepa-

rate output connectors for channels, A and

B, and for the bridge mode. The bridge mode

connector is sealed with a plastic cover to

prevent connection errors.

To prevent ground loops from occurring, the

Q66 is equipped with a ground-lift switch.

When the amplifier is operated in a rack with

units of different ground potential, the switch

may be adjusted to eliminate hum.

Separate potentiometers on the rear panel of

the Q66 allow easy regulation of gain. There

is easily readable nomenclature to ensure

easily repeatable control settings.

The Electro-Voice Q66 is an excellent choice

for high-quality professional sound system

applications which require excellent sound

quality, speaker protection and the highest

level of construction quality and long-term

reliability.

Q66

Stereo Power Amplifier

• 380 watts per channel at 8 ohms;

600 watts per channel at 4 ohms;

and 850 watts per channel at 2 ohms

at 1 kHz

• 1,200 watts bridged at 8 ohms;

1,700 watts bridged into 4 ohms

at 1 kHz

• State-of-the-art limiters driven by a

sophisticated input/output compara-

tor ensure freedom from amplifier

clipping

• High-current Neutrik Speakon

®

output

connectors for channels A, B and

bridged operation for loss-free

connections

• Active-balanced XLR-type input and

paralleled XLR-type output connec-

tors provide easy signal routing

• Rear-mounted dB-scaled detented

level controls for easy control of gain