SANSUI Q-55
¥ 25,160 (1 unit, released in 1958)
Commentary
A professional-type monaural power amplifier designed for high-fidelity broadcasting facilities such as schools, theaters, coffee shops, halls and studios.
High output and low distortion factor are realized by fixed bias system of GT tube 6CA7PP and large transformer.
In addition to its excellent electrical characteristics, it also has high stability, making it possible to play continuously for a long time.
Equipped with a high impedance terminal and monitor terminal, there is little loss even if the speaker is extended far away. Moreover, the output can be heard at the monitor terminal.
The NF amount of 19 dB (V-NFB) is applied and a damped sound can be obtained.
It is designed with punching metal and 2 tone color metallic paint.
Model Rating
| Type | Main amplifier |
| Maximum power output | 50W |
| Frequency characteristic | 30 Hz to 20 kHz - within 3 dB |
| Distortion factor (output 45W) | 0.8% or Less (100 Hz) 0.5% or Less (1 kHz) 0.7% or Less (10 kHz) |
| Signal-to-noise ratio | -65dB or more at maximum output |
| Gain | Max. 50W at input 0.78 v |
| Negative feedback quantity | 19dB |
| Output impedance | 250 Ω, 16 Ω (Single Use) Monitor terminal mounted |
| Vacuum tube used | 12AU7 : 2 Pieces 6CA7 : 2 5AR4 |
| Power supply voltage | 100 VAC, 50Hz/60Hz |
| Power consumption | 130 VA (No Signal) |
| External dimensions | Width 391x Height 196x Depth 125 mm |
| Weight | 10.5kg |