SANSUI QR-500
¥ 55,000 (around 1973?)
Commentary
A 4-channel receiver equipped with Sansui QS synthesizer and decoder functions.
The 2-2-4 method allows you to enjoy four channels of the conventional 2-channel source.
You can also play 4-2-4 matrix records, 4-channel FM broadcasts, and 4-4-4 discrete 4-channel tapes.
The IC developed by SANSUI is used in the synthesizer and decoder section.
A slide type is used for adjusting the volume of front and rear.
Semi-output ITL-OTL system is used for the complimentary service circuit.
Equipped with an FM/AM tuner.
Model Rating
4-channel receiver | |
<Audio section> | |
Music Power (IHF) | 60W (4 Ω) 40W (8 Ω) |
Effective power | 11Wx4 (4 Ω) 8Wx4 (8 Ω) |
Total harmonic distortion factor | 1% or Less (Rated Output) |
Intermodulation Distortion Factor (60 Hz : 7 kHz = 4 : 1, SMPTE) | 1% or Less (Rated Output) |
Power Band Wiz (IHF) | 30 Hz ~ 30 kHz (8 Ω) |
Frequency characteristics (Normal Listening Level) | 30 Hz to 30 kHz ± 2 dB |
Channel separation (at rated output) | 50 dB or More (1 kHz) |
Hum and noise (IHF) | Phono : 60 dB or more Aux : 70 dB or more |
Input Sensitivity (Rated Output, 1 kHz) / Impedance | Phono (2 ch) : 3mV/50k Ω 4 ch input : 180mV/50k Ω Tape mon (Pin) : 180mV/50k Ω Tape Recorder (Din) : 180mV/50k Ω |
Recording level (rated output, 1 kHz) | Tape Rec(Pin):180mV Tape Recorder(Din):30mV |
Load impedance | 4 Ω ~ 16 Ω |
Damping factor | 50 (8 Ω) |
Equalizer | Phono : RIAA NF Type |
Tone Control (front only) | Bass : ± 10 dB (50 Hz) Treble : ± 10 dB (10 kHz) |
Loudness (Volume -30dB) | +8dB(50Hz) |
FM Tuner Section | |
Receiving frequency | 76 MHz to 90 MHz |
Sensitivity | 2.5 μ V (20 dB quieting) 5.0 μ V (IHF) |
Total harmonic distortion factor | Not more than 1% |
Signal-to-noise ratio | 50 dB or more |
Selectivity | 35B or More |
Capture Ratio (IHF) | 3dB |
Image Rejection | 45 dB or more |
IF Rejection | 60 dB or more |
Spurious response rejection | 60 dB or more |
Stereo separation | 30 dB or More (400 Hz) |
Spurious radiation | 34 dB or less |
Antenna input impedance | 300 Ω Balanced Type, 75 Ω Unbalanced Type |
<AM Tuner Section> | |
Receiving frequency | 535 kHz to 1,605 kHz |
Sensitivity | 350 μ V/m (1 kHz, bar antenna) |
Image rejection | 50 dB or More (1 kHz) |
IF Rejection | 45 dB or More (1 kHz) |
Selectivity | 20 dB or more |
<General> | |
Semiconductor used | Transistor : 48 FET : 1 IC : 3 Diode : 23 Pieces |
Power supply voltage | 100 VAC, 50Hz/60Hz |
Power consumption | 100W maximum |
External dimensions | Width 445x Height 132x Depth 306 mm |
Weight | 7.6kg |