audio research


Solid state class T digital switching stereo power amplifier. Each channel has the same circuitry as each module of the 150M.

From the ARC website

After extensive development, we are happy to announce the availability of a new solid-state amplifier from Audio Research that combines high efficiency, musical sound and ample power - all at a very affordable price. The new 150.2 combines the groundbreaking Class T digital switching technology first used in the 150M multichannel amplifier with a fixed (non-modular) two-channel design in a package sized like the older 100.2 amplifier.

The 150.2 produces a strong 150 WPC into 8 ohms, and 300 WPC into 4 ohms. BAL and SE inputs are provided, along with a 12V trigger and detachable A.C. power cord. Like the 150M, the 150.2 produces very little heat because of its high efficiency, so it is ideal for in-cabinet installations. Handles are optional at additional cost, as on the 150M.

Musically, the 150.2 is very much like the remarkable 150M - very refined, open and natural. Some have described the 150M as having virtually no coloration of its own, so that it presents the source material with remarkable transparency and purity. We think the 150.2 is very similar in character, and is sure to find compatibility with a wide variety of loudspeaker types. This amplifies really sings with any Audio Research preamp!

The 150.2 is sure to create a secure, popular niche for itself in the Audio Research product line. It is an entry-level power amplifier with pedigreed performance and the stature of the Audio Research name.




Handles $70/pair. Increased to $80/pair on December 1st 2005.

MSRP (US new retail)
$2,495. Increased to $2,995 on December 1st 2005.


Power output 150 watts per channel into 8 ohms, 300 watts per channel into 4 ohms, both channels driven, 1% THD
Power bandwidth (-3dB points) 5Hz to 40 kHz into 8 ohms or 4 ohms
Frequency response (-3dB points at 1W) 5 Hz to 120 kHz
Input sensitivity 1.4V RMS for rated output (27 dB Gain) single-ended or balanced
Input impedance 150K ohms single-ended, 300K ohms balanced differential
Output taps  
Output regulation 0.05 dB 8 ohm load into open circuit
Overall negative feedback 12dB
Damping factor 200
Slew rate 15 volts/microsecond. (20% maximum duty cycle)
Rise time 2.0 microseconds
Hum & noise 500 microvolts RMS (96 dB below rated output IHF A-weighted)
Power supply energy storage 144,000 µF total
Power requirements 100-125VAC 60Hz (200-250VAC 50Hz) 380 watts at rated output (150WPC 8 ohms), 750 watts at 300WPC 4 ohms, 800 watts maximum, 40 watts idle.
Other Output polarity: Non-inverting from single-ended inputs. Balanced pin 2+ (IEC-268)
Output current: 20 amps peak at protective shutdown
12 VDC trigger and detachable AC power cord
Dimensions 19" 948 cm) W (standard rack panel) x 5.25" (13.3 cm) H x 14.25" (36.2 cm) D (front panel back). Optional handles extend 1.5" (3.8 cm) forward of the .25" thick front panel. Output connectors extend 0.9" behind rear panel.
Weight 30.3 lbs. (13.8 kg) Net; 43.3 lbs. (19.7 kg) Shipping.