audio research
D-110

Description
Solid state stereo power amplifier.

Introduced
1979 (?)

Discontinued
1980

Revisions
D-110B (1979)

Options
-

MSRP (US new retail)
D-110: $2,450
D-110B: $2,450. Later increased to $2,750. Later increased to $3,250.

Specifications

Power output

D110: 110 watts per channel minimum RMS (both channels operating) at 8 ohms from 1 Hz to 20 kHz with less than .25% total harmonic distortion (.1% - D-110B).
D110B: 110 watts per channel minimum RMS (both channels operating) at 8 ohms from 1 Hz to 20 kHz with less than .1% total harmonic distortion. Typical .02% at 1 kHz. Typical 220 watts into 4 ohms, 130 watts into 8 ohms, 70 watts into 16 ohms at clipping.
Power bandwidth  
Frequency response .05 Hz to 100 kHz (-3 dB), 1 W, 8 ohms.
Input sensitivity 1.5 Volts RMS for rated power and load.
Input impedance D-110: 30K ohms
D-110B: 60K ohms
Output taps  
Output regulation  
Overall negative feedback  
Damping factor D-110: More than 200 at rated output and load (20 Hz to 20 kHz).
D-110B: More than 500 (1 Hz to 20 kHz)
Distortion D110: Intermodulation distortion: Less than 0.05% at rated output (80Vp-p) and load, SMPTE method. THD and IMD both decrease with decreasing output (typically less than .02% at 1 watt per channel RMS).
D110B: Intermodulation distortion: Less than 0.1% at rated output (80Vp-p) and load, SMPTE method, 60 Hz and 7 kHz, 4:1
Slew rate  
Rise time  
Hum & noise D-110: Wide band, unweighted, more than 100 dB below 100 watts at 8 ohms - power line components (hum) 90 dB below 100 watts at 8 ohms.
D-110B: Less than 50 microvolts equivalent input noise with shorted inputs (20 Hz to 20 kHz). Typically 95 dB below rated output.
Power supply energy storage  
Power requirements D-110: 105-120/210-240 VAC 50/60 Hz, 600 watts maximum
D-110B: 105-120/210-240 VAC 50/60 Hz, 1500 watts maximum momentary, 550 watts @ rated power, 300 watts @ idle
Other Output offset: Less than 10 mV.
Protection components: Thermal AC switch, AC line fuse, DC supply fuses, speaker line fuses.
Dimensions 19" (48 cm) W (standard rack panel) x 10 ½" (26.5 cm) H x17 ¼" (43.6 cm) D (front panel back). Handles extend 1 5/8" (4.1 cm) forward of the front panel.
Weight 92 lbs. (42 kg) Net, 107 lbs. (49 kg) Shipping.

Reviews

Number 14 (D-110: Full Review), Number 15 (D-110B: Full Review)

Pictures

D-110:

D-110B: