Electro voice force brochure

Page 1

ElectroVoice° _

Force®
Amplifier

Stereo Power Amplifier

~28t) watts per channel at 8 ohms; 450
watts per channel at 4 ohms; 650 watts
per channel at 2 ohms at 1 lot:

- goo watts per channel bridged at
a ohms;1.3llll watts bridged at
4 ohms at 1 ltHz

- Slate-ol-lbe-art limiters driven by a
sophisticated Input/output comparator
ensure lreedom lrom amplilier clipping

. High-current Neutrilt SpeaItono output
connectors lor channels A, B and bridged
operation lor loss-tree connection:

- Active-balanced XLH-type input and
paralleled XLll-typo output connectors
provide easy signal routing

. Rear-mounted dB-sealad delanted level
controls tor easy control at gain

Description

The Electro-Voice Force. Amplifier is a very
high-quality power amplifier designed to
elicit excellent performance from any speaker
system. Its low distortion and substantial
headroom ensure that program material will
be accurately amplified.

Each channel of the Force" Amplifier de-
livers more than 230-watts continuous av-
erage power into 8 ohms, 350 watts into 4
ohms and 450 watts into 2 ohms over the
full audio frequency range. in the bridged
mode, the amplifier can deliver more than
900 watts into 8 ohms and 1,300 watts into
4 ohms at less than 1% THD. The power
supply with its large torodial transformer
gives the amplifier impressive headroom and
current output capability.

The Force Amplifier contains 16 high-
power output devices with 4,000 watts of
dissipation capability. These devices are pro-
tected from overheating by two, three-speed
temperature-sensitive tans The fans are quiet
enough to permit use of the Force0 Ampli-
fier in noise-sensitive applications 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° C
(392 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 Force' Amplifier has sophisticated pro-
tection circuits that guard it and the load from
problems. Protection circuits guard against
overload, over-temperature, shorted outputs,
radio-frequency interference and dc faults.
The output devices are protected against
damage from the reverse feeding of electri-
cal energy (back EMF) from the load and
are switched on via relays to avoid transients
which could damage speakers.

The Force' Amplifier has built-in limiters
to protect speakers from the deleterious ef-
fects of amplifier clipping. The limiters ac-
tion is controlled by very sophisticated in-
put/output comparators which are designed
to preserve the sonic integrity of the source.
The Force0 Amplifier has electronically-bal-
anced XLR-type input and signal output con-
nectors that allow easy, problem-free connec-
tions 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 inde-
pendent level control.

The Force Amplifier professional Neutrik
Speakon° output connectors provide sturdy,
reliable connections and allow use of heavy
wire for loss-free signal transmifiion. There
are separate output connectors for channels,
Aand B, and for the bridge mode. The bridge
mode conneaor is sealed with a plastic cover
to prevent connection errors.

To prevent ground loops from occurring, the
Force Amplifier is equipped with a ground-
lift switch. When the amplifier is operated
in a rack with units of different ground po-
tential, the switch may be adjusted to elimi-
nate hum.

Separate potentiometers on the rear panel of
the Force Amplifier allow easy regulation
of gain. There is easily readable nomencla-
ture to ensure easily repeatable control set-
tings.

The Electro-Voioe Force Amplifier is an
excellent choice for high-quality professional
sound system applications which require
excellent sound quality, speaker protection