Bryston 875Z User Manual
875Z
OWNER’S
MANUAL
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 maintenance (servicing) instructions in the literature accompanying the
product.
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 dry cloth.
7. Do not block any ventilation openings. Install in accordance with the manufacturer's instructions.
8. Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus (includ
ing amplifiers) that produce heat.
9. Do not defeat the safety purpose of the polarized or grounding-type plug. A polarized plug has two blades
with one wider than the other. A grounding type plug has two blades and a third grounding prong. The
wide blade or the third prong are provided for your safety. If the provided plug does not fit into your outlet,
consult an electrician for replacement of the obsolete outlet.
10. Protect the power cord from being walked on or pinched particularly at plugs, convenience receptacles,
and the point where they exit from the apparatus.
11. Only use attachments/accessories specified by the manufacturer.
12. Use only with the cart, stand, tripod, bracket, or table specified by the manufacturer, or sold
with the apparatus. When a cart is used use caution when moving the cart/apparatus combi
nation to avoid injury from tip-over.
13. Unplug this apparatus during lightning storms or when unused for long periods of time.
14. 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 oper
ate normally, or has been dropped.
"WARNING: TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT EXPOSE THIS APPARATUS
TO RAIN OR MOISTURE".
"DO NOT EXPOSE THIS EQUIPMENT TO DRIPPING OR SPLASHING AND ENSURE THAT NO OBJECTS
FILLED WITH LIQUIDS, SUCH AS VASES, ARE PLACED ON THE EQUIPMENT".
"TO COMPLETELY DISCONNECT THIS EQUIPMENT FROM THE AC MAINS, DISCONNECT THE POWER
SUPPLY CORD PLUG FROM THE AC RECEPTACLE".
"THE MAINS PLUG OF THE POWER SUPPLY CORD SHALL REMAIN READILY OPERABLE".
IMPORTANT SAFETY INSTRUCTIONS
875Z - EIGHT CHANNEL POWER AMPLIFIER
Table of Contents
Important Safety Instructions Inside front cover
General Introduction Page 1
Introduction
Description
Shipping Box & Packing Materials
Installation
Wiring the 875Z
Front Panel Page 2
Power Switch
LED Indicators
Fuses
875Z Rear Panel Connectors & Switches Page 3
Input Select Switches
Stereo Bus Inputs
Stereo/Series Switch
Channel Direct Input Connectors
Channel Level Control
Speaker Connectors
Mute Options Switch
875Z Rear Panel Connectors & Switches contd.. Page 4
Signal Sense Threshold
External Zone Mute Connector
Power Inlet
Power-Up Connector
Typical Hookup of the 875Z
in a 5.1 Home Theatre Installation Page 5
Block Diagram Page 6
AC Power Control Page 7
External Control Voltage Power Up
AC Power Input
Technical Specifications Page 8
Important Warranty Information Back Cover
875Z-MANUAL-2004-03-24
875Z - EIGHT CHANNEL POWER AMPLIFIER
1
INTR
ODUCTION
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
875HT: 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
875Z: 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 BO
X & PACKING MATERIAL
Please keep the original shipping box and all packing material. This will ensure the amplifier is protected in future transport. 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 equipment. 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 amplifier.
Never operate the
875 in a vertical position.
WIRING THE 875Z (also see rear panel description )
Speaker 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 application.
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:
The 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.
Loading...