This item is pre-owned, in functional condition. Please view the condition details described below and shown in the photos. Details and Specs This information is to be used for reference only. Accessories or warranties mentioned may not apply to this specific item. Please check the Whats Included section and photos to see everything that comes with this item. 50W x 8 at 8 ohms (80W x 8 at 4 ohms), 160W Mono bridged per zone at 8 ohms), high efficiency, cool running, global bus input, independent inputs per zone, trim level adjustment per channel, global trigger input/ output, independent trigger input/ output per zone, audio sensing per zone, auto Switching delay settings per zone, rack mountable. Whats Included Cord Functional Condition - Excellent We checked this item out for functionality and found it to be in excellent condition. When you get the item, it will have all features and functions fully operational. Cosmetic Condition - Above Average Cosmetically speaking, it looks to be in above average cosmetic shape for an item of this type with only the most minor of cosmetic wear as shown. To be more specific, here is what we noticed: Light use.

Russound D850 8-channel Digital Amplifier 50 wpc -8-channel amplifier with 4 independent playback zones -50 watts per channel into 8 ohms (1,000 Hz) with all channels driven -80 watts per channel into 4 ohms -160 watts per channel into 8 ohms (bridged mode into 4 channels) -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

Russound D850 4 Zone. Used I do not have original box

Russound D850 8-channel Digital Amplifier 50 wpc -8-channel amplifier with 4 independent playback zones -50 watts per channel into 8 ohms (1,000 Hz) with all channels driven -80 watts per channel into 4 ohms -160 watts per channel into 8 ohms (bridged mode into 4 channels) -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

Russound D850 8-channel Digital Amplifier 50 wpc -8-channel amplifier with 4 independent playback zones -50 watts per channel into 8 ohms (1,000 Hz) with all channels driven -80 watts per channel into 4 ohms -160 watts per channel into 8 ohms (bridged mode into 4 channels) -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

Russound D850 8-channel Digital Amplifier Used in Box.

Russound D850 8-channel Digital Amplifier 50 wpc -8-channel amplifier with 4 independent playback zones -50 watts per channel into 8 ohms (1,000 Hz) with all channels driven -80 watts per channel into 4 ohms -160 watts per channel into 8 ohms (bridged mode into 4 channels) -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

Efficient High Power More power, more efficient, more robust…just more. For nearly 50 years Russound has been designing equipment to fit an installer’s needs. When we went to redesign the next generation of our ubiquitous multi-channel amplifier line, we approached it from the ground-up. The result is the D-Series, a completely custom-built solution that has all the great features of our popular R-Series amps in a much more refined platform. The Russound D850 digital multi-channel 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. Its 8 channels are arranged in stereo pairs to provide discreet amplification and custom configurations for each of 4 zones.Sound Quality The D-Series amplifiers all have the same legendary Russound sound quality and installer-friendly features customers have come to expect. Ultra-low distortion output (relatively unheard of in other multi-zone amplifiers) allows for clean, undistorted audio even at high listening volumes. A robust protection circuit provides efficient, safe and reliable operation under extreme conditions and protects each amplifier output channel.Home Theater The D-Series amps are even up to the rigorous demands of home theater applications, easily transforming into a powerful 160 watt X 4 channel monster (in bridged mode). You can also choose to individually un-bridge pairs for lower power applications such as Dolby Atmos® or surround speakers. As an example you could run a 5.1 system at 3 channels @ 160W and 2 channels @ 50W. That’s Russound versatility!Say “no” to the 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.Features: Shipping Dimensions: 21.5 (W) x 9.0 (H) x 22.0 (D), (54.6 x 22.9 x 55.9 cm)Shipping Weight: 24.6 lbs (11.2 kg)Amplifier Channels: 8 channels 4 independent zonesBridge Mode: Select Stereo or Bridge mode per zone 8 Ohm onlyFrequency Response: 20Hz to 20kHz +1.7/-1dB at 1W output into 8 OhmsFuse Rating: 100-120V/T5A, 250V US & Canada, 220-240V/T2.5A, 250V EuropeInput Impedance: >22k Ohms Line InputInput Sensitivity: 600 mV for 80W @ 1 KHz 4 Ohm One Zone 700 mV for 50W @ 1 KHz 8 Ohm One ZonePower Output: 80W /Channel, 1kHz into 4 Ohms, One Zone Driven 50W /Channel, 1kHz into 8 Ohms, One Zone Driven 160W, 1kHz into 8 ohms, BridgePower Requirement(s): North American Model: 100-120VAC 60Hz 600W max IEC C14 type connector with 3 terminal detachable power cord International Model (D850i): 220-240VAC 50Hz 600W max IEC C14 type connector with 3 terminal detachable power cords for UK, Europe, and AustraliaSignal to Noise Ratio: >90dB A-weightedSpeaker Connection(s): Detachable speaker terminals support up to 14awg wireSwitching Delay: Three settings, 5 Seconds, 5 minutes, 10 minutesTrigger Input(s): Bus and Zone @12VDCZone Line Input: Line or Bus select switch per zone

Russound D850 8-channel Digital Amplifier 50 wpc -8-channel amplifier with 4 independent playback zones -50 watts per channel into 8 ohms (1,000 Hz) with all channels driven -80 watts per channel into 4 ohms -160 watts per channel into 8 ohms (bridged mode into 4 channels) -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

Efficient High Power More power, more efficient, more robust…just more. For nearly 50 years Russound has been designing equipment to fit an installer’s needs. When we went to redesign the next generation of our ubiquitous multi-channel amplifier line, we approached it from the ground-up. The result is the D-Series, a completely custom-built solution that has all the great features of our popular R-Series amps in a much more refined platform. The Russound D850 digital multi-channel 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. Its 8 channels are arranged in stereo pairs to provide discreet amplification and custom configurations for each of 4 zones.Sound Quality The D-Series amplifiers all have the same legendary Russound sound quality and installer-friendly features customers have come to expect. Ultra-low distortion output (relatively unheard of in other multi-zone amplifiers) allows for clean, undistorted audio even at high listening volumes. A robust protection circuit provides efficient, safe and reliable operation under extreme conditions and protects each amplifier output channel.Home Theater The D-Series amps are even up to the rigorous demands of home theater applications, easily transforming into a powerful 160 watt X 4 channel monster (in bridged mode). You can also choose to individually un-bridge pairs for lower power applications such as Dolby Atmos® or surround speakers. As an example you could run a 5.1 system at 3 channels @ 160W and 2 channels @ 50W. That’s Russound versatility!Say “no” to the 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.Features: Shipping Dimensions: 21.5 (W) x 9.0 (H) x 22.0 (D), (54.6 x 22.9 x 55.9 cm)Shipping Weight: 24.6 lbs (11.2 kg)Amplifier Channels: 8 channels 4 independent zonesBridge Mode: Select Stereo or Bridge mode per zone 8 Ohm onlyFrequency Response: 20Hz to 20kHz +1.7/-1dB at 1W output into 8 OhmsFuse Rating: 100-120V/T5A, 250V US & Canada, 220-240V/T2.5A, 250V EuropeInput Impedance: >22k Ohms Line InputInput Sensitivity: 600 mV for 80W @ 1 KHz 4 Ohm One Zone 700 mV for 50W @ 1 KHz 8 Ohm One ZonePower Output: 80W /Channel, 1kHz into 4 Ohms, One Zone Driven 50W /Channel, 1kHz into 8 Ohms, One Zone Driven 160W, 1kHz into 8 ohms, BridgePower Requirement(s): North American Model: 100-120VAC 60Hz 600W max IEC C14 type connector with 3 terminal detachable power cord International Model (D850i): 220-240VAC 50Hz 600W max IEC C14 type connector with 3 terminal detachable power cords for UK, Europe, and AustraliaSignal to Noise Ratio: >90dB A-weightedSpeaker Connection(s): Detachable speaker terminals support up to 14awg wireSwitching Delay: Three settings, 5 Seconds, 5 minutes, 10 minutesTrigger Input(s): Bus and Zone @12VDCZone Line Input: Line or Bus select switch per zone

Russound D850 8-channel Digital Amplifier 50 wpc -8-channel amplifier with 4 independent playback zones -50 watts per channel into 8 ohms (1,000 Hz) with all channels driven -80 watts per channel into 4 ohms -160 watts per channel into 8 ohms (bridged mode into 4 channels) -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