audio research
D-100

Description
Solid state stereo power amplifier.

Introduced
1976

Discontinued
1980

Revisions
D-100A (1978)
D-100B (1979)

Options
Wood cabinet (WC-3) $79.50

MSRP (US new retail)
D-100: $895. Later increased to $995.
D-100A: $1,195.
D-100B: $1,495. Later increased to $1,695.

Specifications


Power output D-100A: 100 Watts per channel minimum RMS (both channels operating) at 8 Ohms from 1 Hz to 20 kHz with less than 0.25% total harmonic distortion. Typically less than .02% at rated power in midband. Approximate actual power available per channel at "clipping" (both ch. op.): 4 ohms 200 Watts, 8 ohms 110 Watts, 16ohms 65 Watts
  D-100B: 100 Watts per channel minimum RMS (both channels operating) at 8 Ohms from 1 Hz to 20 kHz with less than 0.2% total harmonic distortion.
Power bandwidth  
Frequency response .05 Hz to 100kHz (-3 dB), 1 W, 8 Ohms
Input sensitivity 1.5 Volts RMS for rated power and load
Input impedance 30 kOhms
Output taps  
Output regulation  
Overall negative feedback  
Damping factor D-100A: More than 200 at rated power and load (20 Hz to 20 kHz)
  D-100B: More than 200 (1 Hz to 20 kHz)
Distortion D-100A: Intermodulation distortion: Less than 0.1% at rated output (80V p-p) and load, SMPTE method
  D-100B: Intermodulation distortion: Less than 0.05% at rated output (80V p-p) and load, SMPTE method, 60 Hz and 7 kHz, 4:1
Slew rate  
Rise time  
Hum & noise D-100A: Wide-band, unweighted, more than 100 dB below 100 watts at 8 ohms - power line components (hum) more than 90 dB below 100 watts at 8 ohms. (Less than 50 µV equivalent input noise with inputs shorted).
  D-100B: Less than 15 microvolts equivalent input noise with shorted inputs (20 Hz to 20 kHz), Typically 106 dB below rated output.
Power supply energy storage  
Power requirements D-100A: 105-120/210-240 VAC, 50/60 Hz, 1000 watts maximum. 160 watts at "idle". 450 watts at rated power.
  D-100B: 120/240 VAC, 50/60 Hz, 500 watts maximum
Other Output offset: Less than 10 mV
Protection components: Thermal AC switch, AC line fuse, DC supply fuses
Dimensions D-100A: 19" (48 cm) W x 5 1/4" (13 cm) H (standard rack mount panel size) x 10 1/2" (26.7 cm) D (front panel back). Handles extend 1 1/2" (3.8 cm) forward of the front panel.
  D-100B: 19" (48 cm) W x 5 1/4" (13 cm) H (rack mount panel) x 10 1/4" (26 cm) D
Weight D-100A: 42 lbs. (19 kg) net, 48 lbs. (22 kg) shipping
  D-100B: 40 lbs. (18 kg) net, 46 lbs. (21 kg) shipping

Reviews

Number 9 (D-100: Full Review)
Vol. 3 No. 12 (D-100)

Pictures

D-100:

D-100A:

D-100B: