Audio Research is one of the most dependable brand names when it comes to high-end audio systems. For years the brand has been recognized by audiophiles throughout the world as equipment that delivers clear and consistent quality in music.

What are the specs for the Audio Research D240?

Power Output:
120 watts per channel into 8 ohms, 240 watts per channel into 4 ohms
Power Bandwidth:
(-3dB points) 8Hz to 60kHz
Frequency Response:
Input Sensitivity:
1.6V RMS for rated putput (25.8dB gain) unbalanced or balanced
Input Impedance:
150k ohms normal or invert, 300k ohms balanced differential
Output Taps:
Output Regulation:
0.05dB 8 ohm load to open circuit
Overall Negative Feedback:
Damping Factor:
Slew Rate:
Rise Time:
1.5 µs
Hum & Noise:
Less than 150 µs RMS (106dB below rated output IHF A-weighted)
Power Supply Energy Storage:
144,000 µF
Power Requirements:
105-125VAC 60Hz (210-250VAC 50 Hz) 480 watts at rated output (120WPC 8 ohms). 800 watts maximum (240WPC 4 ohms), 140 watts idle
Input Polarity: Non-inverting at normal inputs. Balanced pin 2+.
19" (48 cm) W (standard rack panel) x 5¼" (13.3 cm) H x 11 ⅝" (29.5 cm) D (front panel back). Handles extend 1 and ⅝" (4.1 cm) forward of the front panel. Output connectors extend 1" behind rear panel.
38 lbs. (17.3 kg) Net, 49 lbs (22.3 kg) Shipping

What else to know about the Audio Research D240?

The D240 stereo power amplifier represents a new milestone in amplifier design: it combines the musicality and life-like imaging of vacuum-tube and hybrid amplifiers with the maintenance-free convenience of all-solid-state circuit technology. The D240's one-button operation couldn't be simpler - one push and you're ready to play. There's no question about it- the D240 will change the way you think about solid-state amplifiers. It is musical technology on a personal note, designed and engineered to fit the way you live with music. Not surprisingly, all this is brought to you by the company with over 20 years of proven leadership and lasting value in music reproduction: Audio Research.

Brief History of Audio Research

Other Audio Research Products We Often Buy

Typically, StereoBuyers purchases mostly used amplifiers, especially the vintage amps and high-end Audio Research models.

StereoBuyers has purchased tens of thousands worth Audio Research brand equipment since 2014, with individual buys ranging from $100 to well over $50,000. If you are moving, ready to upgrade, or have Audio Research equipment you do not or will not be using, why not contact us today to find out if it is worth good money?

If you are interested in selling your used Audio Research equipment to us in the greater NYC area or Colorado, please click here to fill out a Free Quote Form and we will get back to you. If we agree on terms, we come to meet you where you want, and pay cash.

The following images show actual Audio Research equipment purchased by StereoBuyers.