LUXMAN SQ707
¥ 35,000 (released in August 1969)
Commentary
This pre-main amplifier is a low-cost amplifier for beginners, with LAX technology.
The power amplifier section uses a quasi complimentary service system circuit.
The output stage uses the SEPP-OTL is adopted for the output stage, and the protection circuit is omitted by the system unique to LUX.
The preamp section consists of an NF-type equalizer and an NF-type tone control.
These circuits use carefully selected low-noise transistors.
Equipped with two types of speaker terminals.
Equipped with an attenuator of -18dB.
Equipped with left and right independent tone control.
Equipped with a tape monitor switch.
The front panel is an aluminum hairline finish finished with white gold alumite dyeing.
The knob is also finished in the same way.
Heat-resistant high-impact styrol is used for the hood, and the surface is processed with leather for a unique shape.
A newly developed LUXMAN original terminal is used for the speaker terminal.
The internal structure uses a rational structure without using a chassis.
There was a special wood case sold separately.
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Model Rating
| Type | Pre-main amplifier | ||
| Continuous output | 20W/20W (4 Ω) 17W/17W (8 Ω) |
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| Total harmonic distortion factor | 1% or Less (Maximum Output) | ||
| Frequency characteristic | 30 Hz to 30 kHz ± 1 dB or less | ||
| Input Sensitivity / Impedance | Phono : 2mV/50k Ω Tuner, Aux, Tape rec : 120mV/50k Ω |
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| Signal-to-noise ratio | Phono : 60 dB or more Tuner, Aux, Tape rec : 65 dB or higher |
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| Residual noise | 2 mV or less | ||
| Equalizer | RIAA | ||
| Tone control | NF type bending point switching system | ||
| Damping factor | Approximately 20 (8 Ω, 1 kHz) | ||
| Accessory circuit | Tape monitor Attenuator Headphone jack Mode switching (stereo - mono) Speaker switching (2 systems) Tone control curve point switching |
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| Semiconductor used |
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| Power consumption | 30W (No Signal) 90W at maximum output |
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| External dimensions | Width 373x Height 125x Depth 227 mm | ||
| Weight | 4.9kg | ||
| Sold Separately | Wooden case (¥ 3,500) |