LUXMAN SQ77
¥ 27,800 (released in April 1964)
Commentary
Tube type pre-main amplifier.
Uses 6BQ5 push-pull circuit and high-fidelity output transformer with dedicated NF coil.
Miniaturization has been achieved by the adoption of silicon rectification, etc.
The tone control circuit is a separate type in which the left and right are independent, and a special NF type is used for the circuit.
Equipped with tape monitor function, scratch filter and rumble filter.
It has a headphone port.
The panel design seems to be different between the early stage and the later stage. Also, some of the listed specifications were different.
Model Rating
| Type | Tube type pre-main amplifier | |||||
| Age | Early (around 1964) | The latter half (around 1965) | ||||
| Output (55 Hz, 1% or less) | 10W+10W | 12W+12W | ||||
| Input sensitivity | Phono:4mV Tape:4mV Aux1/2:280mV |
Phono:4mV Tape:4mV Aux1/2:300mV |
||||
| Frequency characteristic | 20 Hz to 25 kHz -2dB | 20 Hz to 20 kHz ± 1 dB | ||||
| Tone control | Bass : ± 9 dB (100 Hz) Treble : ± 9 dB (10 kHz) |
|||||
| Signal-to-noise ratio | Phono:57dB Tape:55dB Aux1/2:63dB |
|||||
| Rumble filter | 80Hz | |||||
| Scratch filter | 5kHz | |||||
| Used vacuum tubes, etc. |
|
|||||
| External dimensions | Width 348x Height 130x Depth 215 mm | |||||
| Weight | 8.7kg | |||||