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Russound R850MC Installation Manual
Rev. 3
Introduction
The Russound R850MC is an 8-channel power amplifier and is ideal for use
as the main amplifier in home theater and distributed audio systems. The
eight channels are arranged in pairs to provide amplification for four stereo
zones. The R850MC provides an array of useful features such as bridge mode
operation, independent zone triggering, bus inputs and multiple speaker
outputs per zone to meet a wide variety of applications and configurations.
The R850MC is rated at 50 watts per channel into 8 ohms and 80 watts per
channel into 4 ohms. With the Stereo/Bridged mono switch in the Bridged
Mono position, both channels in the zone are combined for a higher powered
mono output. In bridged mode, the R850MC is rated at 140 watts of power
into a single 8 ohm load. All this power is backed by two high output torodial
transformers. Each amplifier output channel incorporates robust protection
circuitry for safety and reliability under extreme circumstances.
Thermal Protection
All Russound amplifiers are designed with special circuitry to safeguard the
amplifier under a thermal overload condition. Thermal protection mode can
only engage when the unit has been run at high volume for extended periods
of time without adequate ventilation and/or when speaker impedances are
below the minimum levels for the amplifier. If this fault occurs, turn off the
amplifier, and check that the speaker impedance rating is above the minimum
rating. Also check for adequate ventilation around the amplifier and make
adjustments if necessary.
Once the unit has cooled to safe operating temperatures, the amplifier may
be powered back on.
Protection Circuitry
All Russound amplifiers are designed with special circuitry to safeguard the
amplifier under a short-circuit condition. A faulty speaker can also cause a short
circuit condition. The front panel LED illuminates orange when the amplifier is
in short circuit protection. If this fault condition occurs, turn off the amplifier
and check speakers for short circuit conditions when appropriate.
PROdUCT OVERVIEW
Rack Mounting
The R850MC amplifier can be rack mounted using the included rack-mount
ears and hardware to attach the ears to the amplifier. The amplifier will take
three rack spaces with the feet removed.
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R850MC Side View
Rack Ear
Front View
Rack Ear
Side View
Rack Ear
Screw Holes
