Russound R-SERIES User manual

Data Sheet
R-SERIES AMPLIFIERS
R235LS, R290DS, R850MC, R1250MC
Russound’s R-Series amplifiers employ a robust circuit
design for stability under demanding loads. All models
feature auto signal-sensing inputs and bridgeable
channel pairs for increased power output and flexibility of
application. All amplifier channels feature independent gain
controls for precise level matching and dual speaker outputs
for convenience. Optional rack-mount ears are included with
all models except the R235LS, which features a low-profile
design and mounting capability integrated into the chassis.
Two of the amplifiers have unique features for special
applications. The compact R235LS provides automatic
switching between a multiroom audio system and a local
source, such as a TV or a computer. The R290DS takes
the dual source concept even further with line and speaker
audio inputs and auto sensing for both primary and
secondary sources, a loop output, and more power.
Features R235LS R290DS R850MC R1250MC
Total channels 2 2 8 12
Bridgeable channel pairs 1 1 4 6
Auto signal-sensing inputs ✓ ✓ ✓ ✓
Separate channel gain controls ✓ ✓ ✓ ✓
Thermal protection ✓ ✓ ✓ ✓
Short-circuit protection ✓ ✓ ✓ ✓
Rack mount ears included ✓ ✓ ✓
12-volt trigger input & output ✓ ✓ ✓
Bus input & output ✓ ✓
Source loop outputs ✓
Automatic local source switching ✓ ✓
Power output per channel @ 4/8 Ohms 35W/50W 90W/110W 50W/80W 50W/80W
Multi-power AC outlet ✓ ✓ ✓ ✓

Specifications
Two Channel/Dual Source Amplifi er
R290DS
Stereo Continuous Output Power: 35W per channel at 8 ohms
50W per channel at 4 ohms
Bridged Mono Output Power: 100W at 8 ohms
Distortion: <0.05% THD+N from 20Hz to 20kHz
Signal-to-Noise Ratio: >100dB A-weighted
Frequency Response: 20Hz to 20kHz ±0.3dB
Input Sensitivity: 70mV for 1W at 8 ohms
420mV for 35W at 8 ohms
Line Input Impedance: 47 kilohms
Voltage Gain: 32dB
Delay Time: 5 seconds to 4.5 minutes
Input Trigger: 12VDC 10 kilohms
Output Trigger: 12VDC 100mA max
Power Requirements: North America: 120VAC 60Hz 1.2A
Europe: 230VAC 50Hz 0.6A
Power Connection: IEC 320 power connector with 3-pole
detachable power cord
Dimensions: 8.625” W x 10” D x 2.375” H
(22 x 25.4 x 6 cm)
Weight: 8.5 lbs. (3.8 kg)
Two Channel/Local Source Amplifi er
R235LS
Stereo Continuous Output Power: 90W per channel at 8 ohms
110W per channel at 4 ohms
Bridged Mono Output Power: 250W at 8 ohms
Distortion: <0.05% THD+N from 20Hz to 20kHz
Signal-to-Noise Ratio: >110dB A-weighted
Frequency Response: 20Hz to 20kHz ±0.3dB
Input Sensitivity: 70mV for 1W at 8 ohms
680mV for 90W at 8 ohms
Line Input Impedance: 47 kilohms
Voltage Gain: 32dB
Power Requirements: North America: 120VAC 60Hz 2.5A
Europe: 230VAC 50Hz 1.2A
Power Connection: IEC 320 power connector with 3-pole
detachable power cord
Dimensions: 17” W x 14” D x 4.125” H
(43 x 35.5 x 10.5 cm)
Rack space: 2U
Weight: 17.2 lbs. (7.8 kg)
Single Zone Maximum Output Power
(0.1% THD+N; 1 kHz): 50W per channel, 2 channels at 8 ohms
80W per channel, 2 channels at 4 ohms
140W at 8 ohms, 2 channels bridged
All Zones Continuous Output Power: 35W per channel, 8 channels at 8 ohms
50W per channel, 8 channels at 4 ohms
100W at 8 ohms, each zone bridged
Distortion: <0.05% THD+N from 20Hz to 20kHz
Signal-to-Noise Ratio: >100dB
Frequency Response: 20Hz to 20kHz ±0.3dB
Input Sensitivity: 70mV for 1W at 8 ohms
500mV for 50W at 8 ohms
Line Input Impedance: 47 kilohms
Voltage Gain: 32dB
Delay Time: 0.5 to 4.5 minutes
Input Trigger: 12VDC 10 kilohms
Output Trigger: 12VDC 100 mA
Power Requirements: North America: 120VAC 60Hz 5A
Fuse Rating: T10AL 250V
Europe: 230VAC 50Hz 2.5A
Fuse Rating: T7AL 250V
Power Connection: IEC 320 power connector with 3-pole
detachable power cord
Dimensions: 17” W x 16.5” D x 5.875” H
(43 x 42 x 15 cm)
Rack space: 3U
Weight: 38.1 lbs. (17.3 kg)
Single Zone Maximum Output Power
(0.1% THD+N; 1 kHz): 50W per channel, 2 channels at 8 ohms
80W per channel, 2 channels at 4 ohms
140W at 8 ohms, 2 channels bridged
All Zones Continuous Output Power: 35W per channel, 12 channels at 8 ohms
50W per channel, 12 channels at 4 ohms
100W at 8 ohms, each zone bridged
Distortion: <0.05% THD+N from 20Hz to 20kHz
Signal-to-Noise Ratio: >100dB
Frequency Response: 20Hz to 20kHz ±0.3dB
Input Sensitivity: 70mV for 1W at 8 ohms
500mV for 50W at 8 ohms
Line Input Impedance: 47 kilohms
Voltage Gain: 32dB
Delay Time: 0.5 to 4.5 minutes
Input Trigger: 12VDC 10 kilohms
Output Trigger: 12VDC 100mA
Power Requirements: North America: 120VAC 60Hz 7A
Fuse Rating: T10AL 250V
Europe: 230VAC 50Hz 4A
Fuse Rating: T10AL 250V
Power Connection: IEC 320 power connector with 3-pole
detachable power cord
Dimensions: 17” W x 16.5” D x 5.875” H
(43 x 42 x 15 cm)
Rack space: 3U
Weight: 48.9 lbs. (22.2 kg)
Six Zone/Twelve Channel Multiroom Amplifi er
R1250MC
Four Zone/Eight Channel Multiroom Amplifi er
R850MC
Since 1967, innovation, quality and reliability have been the core of the Russound product tradition. Today, Russound offers everything for enjoying multiroom audio-video in your
home. All audio-video distributed solutions are built to high standards and designed with the unique consideration of making products that are a pleasure to live with and enjoy.
5 Forbes Road, Newmarket, New Hampshire 03857 USA 603.659.5170 www.russound.com
©2008 Russound. All rights reserved. All trademarks are the property of their respective owners. Specifications are subject to change without notice.
Russound is not responsible for typographical errors or omissions.
06/08