audio research

Solid state stereo power amplifier.

From the ARC website

The D130 is a two-channel power amplifier using advanced semiconductor topology from input to output. Like Audio Research's most recent tube amplifier designs, the D130 uses distributed power supplies (52,000 uF total energy storage) on separate output stage circuit boards to yield a virtual dual-mono layout back to the A.C. power transformer. This layout minimizes signal-path lengths and allows the use of high-purity, low-ESR storage capacitors for quicker, cleaner transient response and better overall musical dynamics. Input impedance is a modest 150K ohms single-ended, making the D130 easy to drive with any Audio Research preamplifier. Multiple-emitter transistors (METs) are used in the output stage; these devices have the electrical ruggedness of a bipolar design, and the musicality that MOSFET devices are known for.

A fast-acting, sonically transparent protection circuit shuts down the driver stage of the amplifier whenever a fault condition is sensed at either the input or output of the amplifier (indicated by amber LED). With ample power to drive most contemporary speaker designs (130 WPC into 8 ohms), the D130 is nonetheless compact in size, making it ideal for shelf or cabinet installation (it also has modest heat dissipation, thanks to generous heat-sinking of the output boards). Inputs include both balanced and single-ended connectors for convenient connection to a preamp or A-V processor.





MSRP (US new retail)


Power output 130 watts per channel into 8 ohms, 200 watts per channel into 4 ohms.
Power bandwidth (-3dB Points) DC to 150 kHz into 8 ohms.
Frequency response  
Input sensitivity 1.7V RMS for rated output (25.5 dB Gain) unbalanced or balanced.
Input impedance 150K ohms unbalanced, 300K ohms balanced differential.
Output taps  
Output regulation 0.08dB 8 ohm load to open circuit
Overall negative feedback 21dB
Damping factor 100
Slew rate 50 volts/microsecond
Rise time 1.7 microseconds
Hum & noise Less than 55 microvolts RMS (115dB below rated output IHF A-weighted).
Power supply energy storage 104,000 uF total.
Power requirements 105-125VAC 60Hz (210-250VAC 50Hz) 400 watts at rated output (130WPC 8 ohms), 640 watts at 200WPC 4 ohms, 800 watts maximum, 75 watts idle.
Other Input polarity: Non-inverting at unbalanced inputs. Balanced pin 2+ (IEC-268).


19" (48 cm) W x 5. 25" (13.4 cm) H (standard rack panel) x 8.375" (21.3 cm) D (behind front panel ). Handles extend 1.50" (3.8 cm) forward of front panel. Output connectors extend 1" behind rear panel.
Weight 27.3 lbs. (12.4 kg) Net; 38 lbs. (17.3 kg) Shipping.