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SONAMP
®
875D SE 8-CHANNEL AMPLIFIER
Introduction
Thank you for purchasing the Sonance Sonamp
®
875D SE power amplifier. The 875D SE will provide you with many years
of home entertainment enjoyment. This manual will teach you all about your new amplifier’s many innovative features and
will show you how to get the very best performance from your amplifier. Please read it thoroughly.
Design and Features
Power
The Sonamp
®
875D SE is a hybrid amplifier that
combines digital amplification with analog
power supplies. Its Class T amplifier with Digital
Power Processing™ technology delivers the
high efficiency of digital (Class D) amplification
with the superior sound quality of analog (Class
AB) amplifiers. This allows the 875D SE to deliver high power (75 watts RMS per channel @ 8 ohms x 8 Channels) in an
exceptionally small (2U rack height) package. And unlike conventional digital amplifiers which cannot operate in bridged
configuration, the 875D SE’s Class T circuitry allows you to operate it with any of its four pairs of channels in a bridged
mode, providing 300 watts x 4 channels into an 8-ohm load. Four independent power supplies (one for each zone) supply
plenty of current, so each zone can maintain full performance regardless of how hard any other zones are being driven.
BBE
®
Sound Enhancement
The Sonamp 875D SE incorporates BBE
®
Sound Enhancement. The BBE process improves the presence and detail of speakers,
especially at lower listening volumes, improving the sound quality of your music — especially distributed audio systems
playing background music. BBE also restores clarity and definition (or focus) to spoken voices, which makes paging
systems easier to understand without having to run them at high volumes. Each zone in the 875D SE has individual
controls that let you set the BBE enhancement for that zone to +9dB, +6dB or OFF. The factory default setting is +6dB.
Inputs and Triggers
Multiple audio input connections (DIRECT, L/R & AUX) and buffered line outputs make your 875D SE extremely flexible, so
you can connect the amplifier in a variety of ways depending on your particular system’s configuration. The Illustrations on
pages 15 – 20 show the 875D SE being used in several different possible system configurations. Each zone has its own 12V
input and output triggers and defeatable auto-on signal sensing that can automatically turn the amplifier ON. Recessed
front-panel controls are tamper-resistant, and let you adjust each channel’s input level and each zone’s auto-on sensitivity.
Front-panel LEDs tell you if the 875D SE’s power is on or off, if each Zone is on or off, and the BBE status and fault status
for each zone.
Serial Control Capability
The 875D SE’s RS-232 connection lets you use a variety of 3rd-party serial control systems to control the amplifier.
The serial control provision lets you control almost all of the 875D SE’s functions, and also lets you monitor the amplifier’s
operation from a remote location.
Figure 1: Sonamp
®
875D SE