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.

Features R235LS R290DS R850MC R1250MC

Total channels

Bridgeable channel pairs

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

Multi-power AC outlet

2 2 8 12

1 1 4 6

✓ ✓ ✓ ✓

✓ ✓ ✓

✓ ✓

35W/50W 90W/110W 50W/80W 50W/80W

✓ ✓ ✓ ✓

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.

✓ ✓ ✓

✓ ✓

✓

Specifications

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.

Two Channel/Local Source Ampliﬁ er

R235LS

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)

Four Zone/Eight Channel Multiroom Ampliﬁ er

R850MC

Two Channel/Dual Source Ampliﬁ er

R290DS

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)

Six Zone/Twelve Channel Multiroom Ampliﬁ er

R1250MC

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)

06/08