The Russound R850MC is an 8-channel power amplifier ideal for use as the main amplifier in a single source multi-room or multi-speaker audio system,
such as a restaurant, or as a higher power amplifier in a
four zone system. The eight channels are arranged in pairs to provide amplification for four stereo zones.
The Russound R850MC allows a local source (eg PC or TV in the bedroom) to automatically override the speakers in that particular zone of a distributed multiroom audio system.
This can be accomplished with its auto-sensing line input or with its trigger input for versatility in many different applications.
The Russound R850MC is rated at 50 watts per channel into 8 ohms and 80 watts per channel into 4 ohms. In bridged mono mode the R850MC is rated at 140 watts of power into a single 8-ohm load.
All this power is supplied by two high-output toroidal transformers. Each output channel incorporates robust protection circuitry for safety and reliability
under extreme circumstances.
This power amplifier provides a constant volume gain, and should be used in conjunction
with an audio source from a pre-amp. For example this could be the Russound CAA66, or CAS44 multiroom amplifier
with the pre-amp switch set to variable pre-amp out. Alternatively, if you have your music stored on your computer, on a Media Center PC, on a standalone
Imerge SoundServer, or on an iPod, use the R850MC to amplify it to speaker level. Volume control would be achieved using the
built-in volume control of the computer, SoundServer or iPod.
The Russound R850 also works well with audio streaming devices such as the Sonos ZP80,
which has built-in line level volume controls. Using four ZP80 units feeding into the R1250 gives you a centralised 4 zone multiroom solution accessing
a central music store, Internet radio and up to 4 connected 'local' inputs such as Sky or a DVD player, albeit the local sources would not be
controlled through the Sonos Controller.
When used with an iPod a good combination is to use an iPod docking station. The Marantz IS201
allows you to control the iPod variable volume with an IR remote control.
If your audio source is at a fixed level, eg Sonance iPort, you will need to
use an in-line volume control such as the QED WM21.
One benefit of a high quality specialist power amp like the R850MC is the low level of impedance that it can handle. This means that you can connect multiple pairs of speakers to it, with or without a
multi-way speaker switch or wall mounted volume controls for a simple multiroom system. The R850MC handles down to 4 Ohms impedance meaning
that you can connect to 2 pairs of speakers per stereo zone without a speaker switch, ie 8 pairs of speakers in total, or up to 5 pairs per zone
with an impedance matching switch such as the 5 way QED Transmatch!
The Russound R850MC incorporates features "auto-on" signal sensing to automatically turn the amplifier on when signal is present
from an audio source.
Specification Russound R850MC
.
- Output Power, Stereo Mode, RMS: 50 Watts per channel @ 8 ohms, 80 Watts per channel @ 4 ohms
- Total Harmonic Distortion: 0.05% 20Hz-20kHz @ 8 ohms
- Signal to Noise Ratio: -100dB below rated output (A-weighted)
- Input Sensitivity: 0.70 volts for 1W at 8 Ohms
- Input Impedance: 47k ohms, Min.
- Voltage gain: 32dB
- Delay Time: 30 seconds to 4.5 minutes
- Input Trigger: 12VDC 10 kilohms
- Output Trigger: 12VDC 100mA max
- Weight 17.3kg
- Rack space: 3u
- Dimensions (WxHxD): 430mm x 150mm x 420mm
For the installation manual for the Russound R850MC, click here.(2173kB PDF file)
01603 660901
