Dynavector DV-8250
¥ 270,000 (around 1976)
Commentary
This tube type stereo power amplifier corresponds to the stereo version of DV 8050.
The SEPP circuit is adopted to lower the output impedance, and the design margin of the transformer is greatly increased, and the negative feedback quantity can be taken large, and the band is expanded compared with the conventional one.
By adopting a multiple feedback circuit, the negative feedback amount is 30 dB.
The use of printed circuit boards stabilizes the quality and improves reliability.
Equipped with a peak meter.
The output impedance can be switched.
Air permeability is improved by adopting a structure in which a vacuum tube is attached sideways.
Model Rating
| Type | Bulb type stereo power amplifier |
| Circuit system | Use of SEPP and multiple negative feedback circuit |
| Rated output | 50W/50W (Coaxial Copper for Both Channels) |
| Input sensitivity | 1V |
| Frequency characteristic | 20 Hz ~ 30 kHz + 0 -1dB at 1W Output |
| Distortion Factor (1 kHz) | 0.2% (at 50W output) 0.05% (at 1W output) |
| Residual noise | 0.5 mv (16 Ω Terminal) |
| Input impedance | 250k Ω |
| Output impedance | 0.4 Ω (1 kHz, 16 Ω terminal) |
| Level meter | Peak level meter |
| Vacuum tube used | ECC83, 12BH7A, KT88 |
| Pwer | 90 VAC ~ 110 V, 50Hz/60Hz |
| Power consumption | 330W |
| External dimensions | Width 480x Height 150x Depth 485 mm |
| Weight | 34kg |