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Bryston 9BSST User Manual

Bryston 9BSST
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9BSST
POWER AMPLIFIER
OWNER’S MANUAL
UPDATED 2007-01-08
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Bryston 9BSST Specifications

General IconGeneral
Gain29 dB
Frequency Response20 Hz - 20 kHz
Damping Factor>500
Dimensions19"
Input Impedance20k ohms

Summary

Introduction

Product Description

Shipping and Packing

Installation Guidelines

Ventilation Requirements

Ensure adequate airflow across heat sinks for proper cooling; avoid obstructions.

Wiring and Connections

Speaker Wire Guidance

Use quality wire, keep runs short, and use 12 gauge for runs over 3 meters.

AC Power Considerations

Verify local voltage compatibility; use dedicated circuits for high loads.

Rear Panel Connections

Input Select Switch Function

Allows switching between balanced and single-ended inputs for each channel.

Balanced Input Connector Details

Accepts XLR or 1/4" TRS; use quality shielded cables.

Single-Ended Input Connector Details

Accepts RCA or Phono connectors; use quality shielded cables.

Balanced vs. Single-Ended Input

Explains noise protection, cable length, and impedance differences.

Polarity Inversion Switch

Option to invert input signal polarity by 180 degrees for specific applications.

Input Sensitivity (Gain) Settings

Adjustable gain (1V, 2V, 4V) for optimal matching with pre-amp output levels.

Output Binding Posts

Binding Post Functionality

Connect loudspeakers to RED (+) and BLACK (signal ground) terminals.

Banana Plug Connectivity

Quick disconnect option; ensure post nut is tight for full insertion.

Spade Lug Connectivity

Provides high contact area and secure fastening; specific lug dimensions provided.

Bare Wire Connectivity

Insert wire up to 3 gauge through hole; secure with post knob.

Front Panel Features

SST POWER Switch Operation

Touch-sensitive switch for applying/removing AC power to the amplifier.

LED Indicator Meanings

Indicates channel status: unlit (no power), red (mute), green (normal), flashing red (clipping), orange (thermal shutdown).

Power-Up Sequence LEDs

Channels turn red (mute) during power-up, then green when supplies stabilize.

Unlit LED Interpretation

Indicates no AC mains power; may suggest blown channel fuses.

Clipping Indicator Explained

Flashing red light indicates output distortion due to overdrive.

Thermal Shutdown Indicator Explained

Orange light signifies internal protection activating due to overheating.

Rear Panel Power Entry

Master Circuit Breaker Function

Protects the amplifier; should be ON during operation, OFF for installation.

AC Power Input Port

Connects the power cord; verify local voltage rating at connector.

Power-Up Mode Switch (Local/Auto)

Selects local (front switch/external control) or auto (switched outlet) power-up.

External Turn-On Control

Uses 4-12V AC/DC voltage for remote power-up/down via 'IN' terminals.

Rack Mounting Instructions

Rack Mount Setup Procedure

Details screw removal for channel access; advises caution with channel handling.

Typical Home Theatre Setup

5.1 Home Theatre Connection Diagram

Illustrates typical wiring for a 5.1 system using the amplifier with a processor.

Amplifier Block Diagram

Internal Circuit Block Diagram

Visual representation of the amplifier's internal signal path and components.

Performance Analysis Part 1

Typical Band-pass Noise Graph

Shows noise levels across frequency range, with balanced input details.

Typical THD+N Harmonic Content Graph

Displays harmonic content across frequency, noting even-order dominance.

Typical Frequency Response Graph

Illustrates frequency response with different loads and power levels.

Typical Phase Response Graph

Shows phase shift across frequency for different loads and power levels.

Performance Analysis Part 2

Typical THD+N Sweep Graph

Presents distortion levels across frequency, unaffected by load.

Typical IMD Sweep Graph

Shows intermodulation distortion levels across frequency for different loads.

Damping Factor Graph

Illustrates damping factor across frequency with an 8-ohm reference.

Typical Crosstalk Graph

Shows channel-to-channel crosstalk with different driven loads.

Bridged Mode Operation

Bridged Mode Hookup Guide

Explains wiring and sensitivity settings for bridging two channels.

Bridged Mode Heat Management

Discusses increased heat and potential thermal shutdown during bridged operation.

Optional Bridging Kits

Details available Y-adaptor and ground strap cables for bridging.

Exterior Dimensions

Unit Dimension Diagrams

Provides detailed diagrams showing overall unit dimensions in inches.

Technical Specifications

Power Output Specifications

Details power output per channel into 8 and 4 ohm loads.

Gain and Sensitivity Settings

Lists dB gain and corresponding input voltage for 120W output.

Input Impedance Details

Specifies impedance for single-ended and balanced inputs.

Distortion (THD+Noise) Figures

Quantifies total harmonic distortion plus noise for specified loads.

Noise Level Specifications

Provides noise levels relative to rated output for different gain settings.

Slew Rate Measurement

States the slew rate in volts per microsecond.

Power Bandwidth Range

Defines the frequency range for amplifier operation.

Damping Factor Value

Specifies the damping factor at 20 Hz reference.

Physical Dimensions and Rack Mount

Lists unit dimensions for rack mounting and standard versions.

Unit Weight

States the total weight of the amplifier.

Power Consumption and Heat Load

Details power draw and heat dissipation for various operating conditions.

Important Safety Instructions

General Safety Precautions

Provides essential safety warnings regarding electrical shock, ventilation, and operation.

Bryston Limited Warranty

Warranty Terms and Coverage

Outlines warranty period, coverage, transferability, and service procedures.

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