875Z -
EIGHT CHANNEL POWER AMPLIFIER
1
INTRODUCTION
Thank you for choosing the
875 Eight Channel Power Amplifier
. Bryston welcomes any suggestions you may have, or
comments regarding the operation of your amplifier. We consider you, our customer, to be Bryston’s most important
resource, and your opinion is very much appreciated.
DESCRIPTION
The
875
series is a modular multi-channel audio power amplifier design of 8 x 75 Watts per channel. Currently the
875
is
available in two different versions.
P
875
HT
:
A
Home Theatre
version, the “
HT
”
is essentially 4 stereo amplifiers. Each stereo pair selects from bal
anced or single ended inputs. Each stereo pair may be bridged. The gain of the balanced input is 23dB
and the single ended input is 29dB.
P
875
Z
:
A
Home Install
version, the “
Z
” has 4 stereo amplifiers separated into 4 zones that can be independently
muted or respond to program sense circuitry. Each channel can select from a discrete input, or from a
common stereo input when distribution is wanted. The inputs are single ended with a gain of 29dB. Each
stereo pair may be bridged.
The
power up sequence
of either
875
model may be controlled from a 12v control voltage. The
875
uses ‘soft start’ power
control circuitry to eliminate high inrush currents when A/C power is applied.
WARRANTY
(see back page for details )
SHIPPING BOX & PACKING MATERIAL
Please keep the original shipping box and all packing material. This will ensure the amplifier is protected in future trans-
port. In the unlikely event you have a problem and must return it for service
you must
use the proper packing material.
Ship the amplifier only in the original packing material, as the unit is not insurable by carriers otherwise.
INSTALLATION
The most important installation consideration is
ventilation
. The
875 series
amplifiers are a convection-cooled.
Unrestricted air-flow across its heat sinks is a must. For this reason do not install anything directly above it. Allow 3.5” (2u)
to 5” (3u) inches of space above and to the sides of this amplifier. Do not install directly above other heat generating equip-
ment. Should your installation conditions be constricted, then additional forced air-cooling may be necessary. Any
875
channels thermally shutting down during operation indicates insufficient cooling, and a remedy must be found for cooling
the amplifier. Provide a minimum 6” space to the rear of the
875
for ventilation and dressing cables to and from the ampli-
fier.
Never operate the
875
in a vertical position
.
WIRING THE 875Z
(also see rear panel description )
S
peaker wires
should be as short as practical. Use quality wire, and if runs are more than 3 meters use at least 12 gauge
wire. The speaker binding posts will accept wire up to 3 gauge in size. Bryston can custom build cables for your applica-
tion.
P
A/C power:
Before plugging in the power cord be sure your
875
is specified for the
correct A/C voltage
for your locality. The
voltage is listed by the power input connector. Never lift the safety ground to the amplifier or remove the ground pin
from the plug.
P
Power line conditioners:
T
he
875’s
performance will not improve with the use of power line conditioners. In fact most of the time they restrict
the flow of current in the power line to the amplifier thereby reducing performance at high output levels.
