Skip Navigation

Russound D850

8-channel multi-room power amplifier, 50 watts x 8

10 Reviews | 1 question - 2 answers

Item # 543D850

In Stock

Was: $1,249.99

Price break: -$550.00

Add to Cart

Ask an expert

Our VA-based experts can help.




Our take on the Russound D850

Russound's D850 amplifier offers versatile multi-room flexibility and plenty of power when and where you need it for top-notch sound. Enjoy clear stereo sound in four rooms, or combine two channels into one to give your speakers more juice — a great option for power-hungry outdoor speakers. And unlike traditional amps that run hot and waste a lot of energy, the D850 boasts a high-efficiency Class D amplifier design for cool operation, reduced weight, and clean, undistorted sound even at high listening volumes.

Powerful, cool-running multichannel power amp

Russound's D850 amplifier offers versatile multi-room flexibility and plenty of power when and where you need it for top-notch sound. Enjoy clear stereo sound in four rooms, or combine two channels into one to give your speakers more juice — a great option for power-hungry outdoor speakers. And unlike traditional amps that run hot and waste a lot of energy, the D850 boasts a high-efficiency Class D amplifier design for cool operation, reduced weight, and clean, undistorted sound even at high listening volumes.

More flexible options for enjoying music throughout your home

The D850 can distribute music from one audio source, such as a networked music streamer, to multiple rooms in your home. Or you can connect up to four separate sources and play a different one in each listening room. Each of the amplifier's playback "zones" features independent left- and right-channel gain controls so you can adjust its output to fine-tune the levels of each speaker in your system. For music playback in more than four rooms, you can daisy-chain multiple Russound amplifiers together.

Product Highlights:

  • 8-channel amplifier with 4 independent playback zones
  • power output:
    • 50 watts RMS per channel at 8 ohms (1 kHz, two channels driven)
    • 80 watts RMS per channel at 4 ohms (1 kHz, two channels driven)
    • 160 watts RMS per channel at 8 ohms (1 kHz, bridged)
  • high-efficiency, cool running Class D amplification
  • frequency response: 20-20,00 Hz (+1.7/-1dB at 1 watt output into 8 ohms)
  • signal-to-noise ratio: greater than 90 dB
  • 4 stereo RCA audio inputs, one for each zone
  • stereo RCA global bus input for distributing a single audio source among multiple amplifier channels of your choice
  • independent trigger input/output for each zone
  • audio signal sensing with auto-switching delay settings per zone
  • global trigger input/output
  • cascade bus input/output for "daisy-chaining" additional amplifiers
  • independent gain adjustment for each channel allows volume fine tuning and maximum volume level settings for each zone
  • protection circuit provides safe and reliable operation for each amplifier output channel under extreme conditions
  • detachable speaker terminals support up to 14-gauge wire
  • removable AC power cord
  • rack mountable chassis (rack mount ears included)
  • weight: 19 lbs.
  • 16-7/8"W x 3-1/2"H x 16-3/16"D
  • warranty: 2 years
  • Our 60-day money-back guarantee

What's in the Box:

  • 8-Channel amplifier
  • 6' AC power cord
  • 2 Rack-mount brackets (pre-installed)
  • Installation Manual

Connected to Bose speakers and sonos connect for great sound

Frank, Fairfield, CT


Russound D850 Reviews

Average Customer Review(s):

(10 Reviews)

Russound D850

Crutchfield customer from East Greenwich, RI on 1/20/2019

Crutchfield Customer Review (What's this?)

Works great and exactly as described. Important to utilize time delay dip switches to avoid clipping.



Russound D850

Crutchfield customer from Metairie, LA on 7/31/2018

Crutchfield Customer Review (What's this?)

High quality item. Only complaint is it clicks between songs when using pandora feed. Not sure why but it sounds like it turns off and then back on every time a song changes.



Russound D850

James from Saint George, UT on 7/30/2018

Crutchfield Customer Review (What's this?)

Very nice multi-channel amp. I used this with two Sonos Connect boxes to feed 4 different speaker pairs. I like how each channel can be adjusted individually as well as grouped to the main bus or separated on its own. I used it with 3 grouped channels on the bus and a standalone channel. The unit does come shipped with the volume all the way down on all channels so make sure you adjust that before installing it and wondering why it isn't working. haha. I also like how the unit is rack mountable, though I didn't use it in that configuration. I would definitely buy one of these units again.



Russound D850

Frank from Fairfield, CT on 7/24/2018

Crutchfield Customer Review (What's this?)

Connected to Bose speakers and sonos connect for great sound



Great amp, easy set up but turn gain levels up right away

Tom from Bronxville, NY on 12/22/2017

This would have been a five star review but the fact that there was no mention about the amp being shipped with the gain level controls set at zero. Left and right screw dials are potted all the way down out of the box. Yes, I should have noticed it sooner but it is not obvious to a layman. There are no volume dials, just the gain level screws. After getting the unit connected to my speakers there was no sound and I wasted a good half hour troubleshooting every component in our system only to have an "Oh, #%&*! moment" when I realized the gain level was at zero. The rest of this amp is wonderful, including the set up. Very easy. The speaker terminals are removable so you don't have to go crazy matching your speaker zones if they are not labelled. Just switch them around. The amp runs very cool and that is perfect because we have it in a small closet. Note to Russound: put a warning sticker on the unit or manual alerting us non-pros to the fact that the amp ships with the gain set to zero.

Pros: Compact size, runs very cool, clean sound.

Cons: Gain level controls are potted to zero out of the box so be aware of that or your will have no sound after connecting speakers. Use a small screwdriver to turn up the L and R levels.

Russound D850

Crutchfield customer from Long Island, NY on 11/12/2017

Crutchfield Customer Review (What's this?)

Easy setup and works as intended.


Cons: Doesn't have an optical out

Russound D850

Crutchfield customer from Gainesville, GA on 9/3/2017

Crutchfield Customer Review (What's this?)

I really needed more DIF input but it will have to do!



Great multi-room amplifier for a great price

Patrick from Frisco, TX on 9/2/2017

Crutchfield Customer Review (What's this?)

This is a great little amplifier that is well priced, very well built and functions extremely well. I especially like the fact that if a specific channel is shorting due to positive and negative wires touching, it does not blow a fuse or stop amplifier operations, but instead, gives a flashing LED light to indicate a problem status. The only downside is the speaker terminal connections, which require tightening with a screwdriver, from above, which is difficult in tight spaces. However, this produce deserves an overall great rating.

Pros: Well built, nice features, good sound

Cons: screw terminal speaker connectors

Russound D850

Crutchfield customer from Southampton, NY on 7/14/2017

Crutchfield Customer Review (What's this?)

I have used this amp in several customer locations. Simple to use and easy adjustments. Great quality product.



Russound D850

Crutchfield customer from Brandon, FL on 4/18/2016

Crutchfield Customer Review (What's this?)

Worked great to feed multiple rooms overhead ceiling speakers music from Yamaha 2050 av.

Pros: Easy to hookup offers different options for connecting to speakers and music source.

Cons: None so far!!!


Hands-on research

Product Research


8-Channel/4-Zone Amplifier: The Russound D850 digital multichannel amplifier offers the features custom installation professionals demand while offering a lighter weight, smaller chassis and more efficient Class D power. The feature-rich design of the D850 is ideal for the demands of distributed audio systems and is also compatible with our Russound volume controls. The D850's eight channels are arranged in stereo pairs to provide discreet amplification and custom configurations for each of four zones.

System Configuration: The Russound D850 can be configured as the main amplifier for an audio distribution system or home theater system.

  • Distributed Audio: When used with an audio distribution preamp, each zone can independently drive one of several different sources by using each zone's individual line audio inputs, or a pair of zones can be bridged to create a higher powered zone.
  • Home Theater Application: The D-Series amp is even up to the rigorous demands of home theater applications, easily transforming into a powerful 160 watt x 4 channel amplifier (in bridged mode). You can also choose to individually un-bridge pairs for lower power applications.

Bridged Mode: When the amplifier is in Bridged mode operation, both the left and right channels are combined for a higher power mono output. In bridged mono mode, both channels in any zone become a robust mono output delivering 160 watts of power into an 8 load.

Ultra-Low Distortion: Ultra-low distortion output (relatively unheard of in other multi-zone amplifiers) allows for clean, undistorted audio even at high listening volumes.

Auto Sensing Zone Inputs w/ Independent Control: Each zone of the amplifier features a stereo RCA input. These line-level inputs are auto-sensing and will activate when an audio signal from a source is present. Each Zone input offers independent gain control for the left and right RCA channel. When used in Bridged Mode, only the left gain is used.

Bus Input & Output: The bus line input is a stereo RCA input that can be used to connect a single source to multiple zones. The bus line output is a stereo RCA output that allows passive passthrough of the Bus Input and can be used to daisy chain the source to other amplifiers in the system.

Speaker Outputs: The Russound D850 multichannel amplifier is fitted with phoenix-style speaker connectors. The minimum speaker impedance is 4 for Stereo Mode and 8 for Bridge Mode.

Trigger Inputs/Outputs: The Russound multiroom amplifier features Zone 12V trigger inputs/outputs (3.5mm) and Bus 12V trigger inputs/outputs (3.5mm) for added convenience.

  • Zone 12V Triggers: The Zone 12V Trigger In is used to activate a specific zone. The Zone Trigger Out can be used to trigger other 12V devices. The delay and audio sensing are bypassed when the 12V Zone Trigger Input is used.
  • Bus 12V Triggers: The Bus 12VDC Trigger In is used to activate all zones that are using the Bus Input and disables other zone triggers or signal sensing on those zones when it is used. If the Bus Trigger In has 12V applied to it, only the 12V Bus Trigger Out will have 12V and the Zone Trigger Outputs will not.

Zero Hum: Advanced triggering options allow the amps to operate on demand. Apart from the obvious energy efficiency, there is no amplifier hum on your speakers when the system isn't in use.

Zone Indicator LEDs: The four LEDs on the unit's front-panel correspond to the D850's four stereo zone amplifiers. The LEDs will illuminate blue when the amplifier power is on and a zone is active. The LEDs do not illuminate when a zone is off.

Protection Circuitry: A robust protection circuit provides efficient, safe and reliable operation under extreme conditions and protects each amplifier output channel. Russound's resilient protection circuit maintains safe and dependable operation in maximum performance conditions.

  • Thermal Protection: The amplifier is 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.
  • Short Circuit Protection: The Russound amplifier is also designed with special circuitry to safeguard the amplifier under a short-circuit condition. A faulty speaker can also cause a short circuit condition. The Zone LED will blink rapidly between Red and Blue when the Zone is in short circuit protection.
Note: The amplifier will auto-correct itself when the trouble condition has been removed. The amplifier will then resume normal operation.

Auto Standby: The amplifier will go into Standby mode when audio signal or trigger is not present, and after the minimum delay time has timed out. The amplifier consumes 0.5 Watt or less current while in standby power mode. Standby delay can be adjusted to either 5 seconds, 5 minutes, or 10 minutes by using the DIP switches on the rear panel. This delay is selectable per zone. When an audio signal is not present, the amplifier will automatically go into standby mode after the preset period of time.

Rack Mountable: The multichannel power amplifier includes a set of rack ears for rack mounting applications. The amplifier will take two rack
spaces with the feet removed.

Optional Volume Controls: The  D850 amplifier has been tested to work with all Russound autoformer-based volume controls (sold separately).

Our Product Research Team

At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team. They verify what’s in the box, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.

Q & A

Customer Q&A

Crutchfield asked  
Why did you buy this?

First as in everyones ind Price. A great price. Had everything needed to make my system up to it's potential. Running Marantz 8012 with Polk LSIM 707 tower front 705 rear and 706c center and side. But, Price and communication / assistance is key. [ David  Dec 27, 2018 ]
Ask me later, after I've received the product and tested it. [ Martin  Dec 09, 2018 ]
The reputation of the brand for quality durable products. [ Daniel  Feb 10, 2018 ]
told to [ Janet  Dec 16, 2017 ]
Doc, the fine Crutchfield Specialist recommended it. I have never gone wrong following the counsel from Crutchfield. [ ADAM  Dec 07, 2017 ]
Dallas recommended [ Eric  Nov 30, 2017 ]
Quality! [ Brian  Sep 29, 2017 ]
It met my needs, was priced the most competitively, and was highly recommended. Plus, my consultant took the time to explain to me exactly why this item was the better choice for me than lower priced alternatives that seemed very attractive. I appreciated the time spent to help me from making a potential mistake in product selection. [ Patrick  Aug 16, 2017 ]
Individual gain, line or bus, flexibility, power [ Ken  May 21, 2017 ]

1 question already asked

I have a sonos streamer as my only source. Plugged into the bus. I keep the same music in all 4 zones, but I have a volume control in every zone. [ Alek  Jan 02, 2019 ]
Yes. Though you can pretty much connect a chromcast audio to anything provided you have the correct cable. In your case, you want to make sure you have the red and white RCA male cables coming out of the Chromecast Audio device to connect to the female input side of the amp. There are switches on the back of this amp if i recall that allow you to bridge one input to all of the outputs. In your case though, do you need multiple zone amp to accomplish your goal? This unit is good for wiring multiple rooms with two speakers per room. [ Jim Krupa - Dri  Dec 28, 2018 ]