Description
Tube stereo power amplifier. Unit can be bridged to make a 500 watt mono-block amp.
Introduced
1983
Discontinued
1991 ?
Revisions
D-250 MKII (1984)
D-250 MKII Servo
Options
-
MSRP (US new retail)
$4,995
$5,500 (D-250 MKII)
$6,500 (D-250 MKII Servo)
Specifications
| Power output | 240 watts per channel minimum continous power (both channels operating) at 16 ohms from 20Hz to 20kHz with less than 1% total harmonic distortion (typically below .005% at one watt output) |
|---|---|
| D-250 MKII Servo: 250 watts per channel minimum continuous into 16, 8, 4 ohms from 20Hz to 20kHz with less than 1% THD at rated output and below .005% at 1 watt. | |
| Power bandwidth | |
| Frequency response | |
| Input sensitivity | D-250 MKII Servo: .8V RMS for rated output. |
| Input impedance | 80 kOhms |
| Output taps | |
| Output regulation | |
| Overall negative feedback | |
| Damping factor | |
| Distortion | |
| Slew rate | |
| Rise time | |
| Hum & noise | |
| Power supply energy storage | 550 joules |
| Power requirements | D-250 MKII Servo: 105-125VAC, 2000 watts (20 amps), 900 watts at "idle". |
| Tube complement | D-250: (6) 6922, (4) 7119/7044, (8 matched pairs) 6550, (4) 6550, (2) 12AT7 |
| D-250 MKII/D-250 MKII Servo: (4) 6922, (4) 7119/7044, (2) 6FQ7, (8 matched pairs) 6550, (4) 6550, (2) 12AT7 | |
| Other | |
| Dimensions | 19" W (rack panel) x 10.5" H x 20.75" D (does not include rack handles, front or back) |
| Weight | 120 lbs. Net, 155 lbs. Shipping |
Reviews
Number 32 (D-250: Full Review), Number 34 (D-250: Editor's
Choice), Issue 36 (D-250 MKII: Special Report), Issue 37 (D-250 MKII: Further Thoughts), Issue 45 (D-250 MKII Servo:
Full Review), Issue 50 (D-250 MKII Servo: Capsule)
Vol. 7 No. 8 (D-250 MKII), Vol. 9 No. 5 (D-250 MKII
Servo)Pictures
D-250:
 |
 |
 |
D-250 MKII:
 |
 |
 |
 |
 |
 |
D-250 MKII Servo:
 |
 |
 |
 |
 |