Audio Database

QR-500
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