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audio research
SDA1

Description
Solid state four channel power amplifier.

From the ARC website

The SDA1 Four Channel Power Amplifier is designed for use with the SDP1 processor. Rated at 100 watts x 4 into 8 ohms (150 watts x 4 into 4 ohms), the SDA1 offers complete flexibility for installation in a wide range of multichannel music systems. It can be used on its own, in a four-channel system not requiring a center channel. Alternatively, either of the two channel pairs can be bridged to produce 300 watts into 8 ohms-yielding a perfect three-channel amplifier with higher power delivery to a center channel or passive subwoofer. Or, both pairs can be bridged simultaneously for a 300-watt per channel stereo amplifier. Inputs are balanced and single-ended.

Introduced
1995

Discontinued
?

Revisions
-

Options
-

MSRP (US new retail)
$3,995

Specifications

Power output 100 watts per channel into 8 ohms, 150 watts per channel into 4 ohms. 300 watts into 8 ohms, bridged
Power bandwidth (-3dB points) DC to 150 kHz into 8 ohms
Frequency response  
Input sensitivity 1.5V RMS for rated output (25.5 dB Gain) unbalanced or balanced
Input impedance 150K ohms unbalanced, 300K ohms balanced differential
Output taps  
Output regulation 0.09dB 8 ohm load to open circuit
Overall negative feedback 21 dB
Damping factor 100
Distortion  
Slew rate 50 volts/microsecond
Rise time 1.7 microseconds
Hum & noise Less than 40 microvolts RMS (117dB below rated output IHF A-weighted)
Power supply energy storage 154,000 uF total
Power requirements 105-125VAC 60Hz (210-250VAC 50Hz) 640 watts at rated output (100WPC 8 ohms), 800 watts at 150WPC 4 ohms, 800 watts maximum, 105 watts idle
Other Input polarity: Non-inverting at unbalanced inputs. Balanced pin 2+ (IEC-268)
Dimensions 19" (48 cm) W (standard rack panel) x 51/4" (13.3 cm) H x 127/8" (32.7 cm) D. Handles extend 11/2" (3.8 cm) forward of the 3/8" thick front panel. Output connectors extend 1" behind rear panel
Weight 37.2 lbs. (16.9 kg) Net; 48.7 lbs. (22.1 kg) Shipping.

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