LUXMAN SQ507
¥ 69,000 (released in December 1969)
Commentary
This is a pre-main amplifier that uses the pre-main type that has been handed down from the past to enrich the contents as much as possible and bring out a good balance.
The power amplifier uses the quasi complimentary service SEPPP OTL system.
The preamp section uses a 3-stage E-E feedback equalizer that provides a wide dynamic range and greatly reduces distortion in the high frequency range.
The power supply for the preamplifier and power amplifier uses a ripple filter with one transistor for each to improve SN.
The tone control features a friction-type double volume and usually works together, but the left and right can be adjusted separately.
You can also select the bending point frequency from 3 points to adjust the sound quality to your preference.
Equipped with a low-boost switch, it can increase the bass range.
Equipped with high and low filters.
Two types of speaker terminals are installed.
The whole panel is finished with white gold dyeing and the wood case is finished with rosewood.
Equipped with an automatic recovery type protection circuit in case of emergency.
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Model Rating
| Type | Solid state pre-main amplifier | ||||||
| Power Amplifier Unit | |||||||
| Continuous output | 60W/60W (8 Ω) 40W/40W (16 Ω) |
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| Total harmonic distortion factor | 0.2% or Less (60W, 8 Ω, 1 kHz) | ||||||
| Frequency characteristic | 10 Hz to 50000 Hz -1dB or less | ||||||
| Input sensitivity | 800 mv (Maximum Output) | ||||||
| Input impedance | 50k Ω | ||||||
| Residual noise | 0.5 mV or less | ||||||
| Damping factor (1 kHz) | 35 (8 Ω) 70 (16 Ω) |
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| Attachment | Attenuator : -12dB/oct. A and B speaker selector switch Headphone jack |
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| Preamplifier Section | |||||||
| Frequency characteristic | 20 Hz to 50000 Hz -1dB or less | ||||||
| Total harmonic distortion factor | 0.1% or Less (1 kHz, 1 V) | ||||||
| Residual noise | 100 μ V or less | ||||||
| Input Sensitivity / Impedance | Phono1 : 2mV/30k Ω, 50k Ω, 100k Ω Phono2 : 2mV/50k Ω AUX1 : 100 mV or More (Adjustable) / 100k Ω AUX2 : 100mV/200k Ω Tape Play : 100mV/100k Ω |
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| Signal-to-noise ratio | Phono1, 2 : 60 dB or more AUX1, 2, Tape Play : 70 dB or more |
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| Crosstalk (1 kHz) | Between channels : 55 dB or more Between input types : 70 dB or more |
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| Tone control | LUX System NF Type with Bending Point Switching High-Note : 1.5k, 3k, 6 khz, defeat Bass : 600, 300, 150 Hz, defeat |
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| Attachment | Low Boost : 80 Hz, 6dB/oct. High Cut : 5 kHz, -6dB/oct. Low-cut : 100 Hz, -6dB/oct. Tape monitors : DIN connectors |
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| Semiconductor used |
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| Power supply voltage | 100 VAC, 50Hz/60Hz | ||||||
| Power consumption | 170W at maximum output | ||||||
| External dimensions | Width 450x Height 160x Depth 268 mm | ||||||
| Weight | 11kg | ||||||