Sansui QRX-4500

Data

General

• Manufacturer: Sansui
• Model: QRX-4500
• Type: Quadraphonic Receiver
• Years of manufacture: 1972 - 1974
• Manufactured in: Japan
• Color: brushed aluminum front, wooden cabinet
• Remote control:
• Power consumption: 310 W max.
• Dimensions: 526 x 171 x 317 mm (WxHxD)
• Weight: 18.6 kg
• Original price approx.: 2'790 DM

Connections

• Number of inputs:
  • Phono: 2.5 mV, 50 kOhm, max. 330 mV
  • Aux 2-channel: 150 mV, 50 kOhm
  • Aux 4-channel:
    • Low: 150 mV, 50 kOhm
    • High: 450 mV, 50 kOhm
  • Tape Play 1, 2, 2-channel: 150 mV, 50 kOhm
  • Tape Play DIN, 2-channel: 150 mV, 50 kOhm
  • Tape Play 1, 2, 4-channel: 150 mV, 50 kOhm
  • Tape Play DIN, 4-channel: 150 mV, 50 kOhm
  • Discrete 4-channel: 150 mV, 50 kOhm
  • Main In:
  • Antenna (FM: 75, 300 Ohm, AM)
  • Microphone (6.3mm jack).
• Number of outputs:
  • Tape Rec 1, 2: 150 mV

Tape Rec DIN: 30 mV

• • Dolby NR Adapter:
  • Pre Out: 1 V
  • Headphones (6,3mm jack): 1x front, 1x rear
  • 3 speaker pairs front
  • 2 speaker pairs in the back

Technical Data

Amplifier

• Continuous power (at distortion):
  • 8 Ohm: 4x 23 W (RMS, 20 Hz - 20 kHz, 0.5 %), 4x 27 W (1 kHz).
  • 4 Ohm: 4x 38 W
• Dynamic power:
  • 8 Ohm: 160 W
  • 4 Ohm: 240 W
• Total harmonic distortion: < 0.3 %
• Attenuation factor: 40 at 8 Ohm
• Frequency response:
  • phono: 30 Hz - 15 kHz, ± 1 dB
  • High level: 20 Hz - 30 kHz, ± 1 dB
• Signal-to-noise ratio:
  • Phono: 60 dB

High level: 70 dB

• Tone control:
  • Bass: ± 15 dB at 50 Hz

Treble: ± 15 dB at 20 kHz

• Loudness: + 8 dB at 50 Hz, + 3 dB at 10 kHz
• Treble filter: - 10 dB at 10 kHz, 6 dB / octave
• Subsonic: - 10 dB at 50 Hz, 6 dB / octave
• Mute:

Tuner

• Reception: FM, MW
• Frequencies:
  • FM: 88 - 108 MHz
  • MW: 530 - 1,605 kHz
• Input sensitivity:
  • FM: 2.0µV
  • MW: 50µV
• Frequency response: 30 - 15,000 Hz (+0.3 dB, -1 dB)
• Distortion factor:
  • FM, 1 kHz: < 0.5% (mono), < 0.8% (stereo).
• Signal-to-noise ratio:
  • FM: 65 dB (mono), 60 dB (stereo)

MW: 55 dB

• Channel separation: 35 dB (1kHz)
• Selectivity:
  • FM: 50 dB
  • MW: 30 dB
• Co-wave selection: 1.5 dB
• Spurious wave selection:
  • FM: 90 dB
  • MW: 35 dB
• Image frequency attenuation:
  • FM: 80 dB
  • MW: 100 dB
• IF attenuation:
  • FM: 80 dB
  • MW: 100 dB
• AM suppression: 55 dB

Special Features

• 4 VU meters
• Switch for 4-channel RM, SQ, Discrete / Stereo / Mono
• CD-4 connectable
• Bass and Tweeter control separately for Front / Rear
• Tape 2-channel front connectors 6.3mm jack: Rec, Play

Remarks

• Other models in the same series:
• Sansui QRX-3000
• Sansui QRX-3500
• Sansui QRX-4500
• Sansui QRX-5001/501
• Sansui QRX-5500
• Sansui QRX-6001/601
• Sansui QRX-6500
• Sansui QRX-7001/701
• Sansui QRX-7500
• Sansui QRX-8001/801
• Sansui QRX-9001/901

Pictures

• Extract from brochure: Sansui QRX-4500

Reports

• Review from "Good Old Hifi": [[1]]