SANSUI BA-303
¥ 109,000 (around 1970)
Commentary
A tube type power amplifier released by SANSUI.
After BA-202 and BA-303, a bulb-type power amplifier was not sold for a long time.
The circuit configuration is Williamson type.
This type of circuit configuration is not suitable for a high-feedback amplifier because it has three stages of time constant in the low-frequency range. However, it has a feature that the high-frequency characteristics hardly deteriorate compared to the mid-frequency range because it consists of an all-3-pole tube.
Output tube KT-88 is used for BA 303.
Equipped with a bias check meter.
Model Rating
| Type | Stereo power amplifier |
| Effective power | 27W + 27W (8 Ω) |
| Music power | 60W (8 Ω) |
| Frequency band | 15 Hz ~ 50000 Hz |
| Total harmonic distortion factor | 0.3% (8 Ω at Rated Output) |
| Input Sensitivity / Impedance | 0.9V/100k Ω |
| Signal-to-noise ratio | 80 dB (at rated output) |
| Damping factor | 1, 2, 4, 8, 15, 30 (8 Ω) * Equipped with selector switch |
| Used vacuum tubes, etc. | Vacuum Tube x8 (6AQ8x2, 12AU7x2, KT-88x4) 6 diodes |
| External dimensions | Width 432x Height 332x Depth 181 mm |
| Weight | 26.5kg |