SANSUI QR-1500
¥ 65,000 (around 1973?)
Commentary
A 4-channel receiver equipped with Sansui QS synthesizer and decoder functions.
It supports 2-channel source and 4-channel matrix source, and can be converted to 4-channel and played back.
Discrete 4-channel tapes and other 4-channel sources can also be 4-channel.
It is equipped with a mode switch that moves the front position of channel 4 freely backward or to the right.
It is also possible to output two channels of sound simultaneously from both front and rear, or from only front or rear.
A specially selected low-noise silicon transistor is used for the preamp section, an NF-type tone control is used for tone control, a loudness switch and a slide-type volume control for front and rear volume control.
The FM section employs a front end using a dual-gate FET and a 3-row precision varicon, and an IF stage using a 4-element ceramic filter and IC.
A large ferrite bar antenna is used for the AM part.
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Model Rating
| 4-channel receiver | |
| <Audio section> | |
| Music Power (IHF) | 100W (4 Ω) 80W (8 Ω) |
| Effective power | 20Wx4 (4 Ω) 15Wx4 (8 Ω) |
| Total harmonic distortion factor | 0.8% or Less (Rated Output) |
| Intermodulation Distortion Factor (60 Hz : 7 kHz = 4 : 1, SMPTE) | 0.8% or Less (Rated Output) |
| Power Band Wiz (IHF) | 20 Hz ~ 30 kHz (8 Ω) |
| Frequency characteristics (Normal Listening Level) | 2 ch Aux : 30 Hz to 30 kHz ± 2 dB |
| Channel separation | 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 Aux : 300mV/50k Ω 2 ch Aux : 180mV/50k Ω Tape mon (Pin) : 180mV/50k Ω Tape Recorder (Din) : 180mV/50k Ω |
| Recording level (2 ch, 1 kHz rated output) | Tape Rec(Pin):180mV Tape Recorder(Din):30mV |
| Load impedance | 4 Ω ~ 16 Ω |
| Damping factor | 20 or More (8 Ω) |
| Equalizer | Phono : RIAA NF Type |
| Tone Control (front only) | Bass : ± 10 dB (50 Hz) Treble : + 8 dB ~ -10dB (10 kHz) |
| Loudness (Volume -30dB) | + 8 dB at 50 Hz, + 3 dB at 10 kHz |
| FM Tuner Section | |
| Receiving frequency | 76 MHz to 90 MHz |
| Sensitivity | 2.3 μ V (20 dB quieting) 3 μ V (IHF) |
| Total harmonic distortion factor | Not more than 1% |
| Signal-to-noise ratio | 55 dB or more |
| Selectivity | 45 dB or more |
| Capture Ratio (IHF) | 3dB |
| Image Rejection | 50 dB or more |
| IF Rejection | 90 dB or more |
| Spurious response rejection | 60 dB or more |
| Stereo separation | 35 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 | 200 μ V/m (1 kHz, bar antenna) |
| Image rejection | 50 dB or More (1 kHz) |
| IF Rejection | 70 dB or More (1 kHz) |
| Selectivity | 30 dB or more |
| <General> | |
| Semiconductor used | Transistor : 57 FET : 1 IC : 1 Diode : 24 units |
| Power supply voltage | 100 VAC, 50Hz/60Hz |
| Power consumption | 130W maximum |
| External dimensions | Width 480x Height 132x Depth 310 mm |
| Weight | 9kg |