Sansui QA-7000

Data

General

• Manufacturer: Sansui
• Model: QA-7000
• Type: Quadrophonic / Stereo integrated amplifier
• Made in: Japan
• Color: Black
• Construction period: 1973 - 1976
• Power consumption: 340 W
• Dimensions: (WxHxD) 440 x 140 x 322 mm.
• Weight: 14 kg
• Original price approx.: 137'000 Yen (Japan, 1973), 550 US-$, 2'850 DM

Connections

• Number of inputs:
  • Phono 1 & 2: 2.5 mV, 50 kOhm.

2-channel tape deck RCA: 100 mV, 50 kOhm 2-channel tape deck DIN socket: 100 mV, 50 kOhm

• • 4-channel tuner: 100 mV, 50 kOhm
  • 4-channel Aux 1 & 2: 100 mV, 50 kOhm
  • 4-channel tape deck 1 & 2: 100 mV, 50 kOhm
  • Power amp input: 800 mV, 50 kOhm
• Number of outputs:
  • Tape Deck RCA: 100 mV, 2 kOhm
  • Tape Deck DIN: 30 mV, 65 kOhm
  • Preamp output: 800 mV, 600 Ohm (Max. level: 6.5 V at <0.5% THD)
  • Terminals for 4 speakers

Technical Data

• Continuous power (at THD)
  • 8 Ohm: 4 x 15 W

8 Ohm BTL: 2 x 40 W

• Dynamic power
  • 4 Ohm: 108 W
  • 4 Ohm BTL: 160 W
• Total harmonic distortion: < 0.1%
• Attenuation factor: 100 at 8 Ohm
• Overall frequency response: 10 - 30'000 Hz
• Signal to noise ratio:
  • Phono 1 & 2: >70 dB
  • Tuner: >80 dB

Aux: >80 dB

• • Power Amplifier Input: >90 dB
• Tone control:
  • Bass: ± 15 dB

Treble: ± 15 dB

Special Features

• Switchable 2-channel or 4-channel operation:
  • 4-channel function QS Synthesizer:
    • Reverb

Surround

• • 4-channel function QS Regular Matrix:
    • Reverb
    • Surround
  • 4-channel Phase Matrix
  • 4-channel discrete
• 1 Tape connection according to DIN
• Low Filter
• High Filter
• Loudness: + 8 dB at 50 Hz, + 3 dB at 10 kHz
• Muting: - 20 dB
• 4-channel pre- and power amplifier can be separated
• Connections for 4 speakers

Notes

• Other models in the same series:
• Stereo amplifier:
• Sansui AU-6500
• Sansui AU-7500
• Sansui AU-8500
• Sansui AU-9500

• Quadro Amplifier
• Sansui QA-7000

• Tuner:
• Sansui TU-7500
• Sansui TU-9500

• This model was also available in Japan as the QSC-9050 without a power amplifier. See also:
  • Sansui QSC-9050 [1]

Pictures

• Image: Sansui QA-7000

• Picture: Sansui QA-7000 interior view

• Image: Sansui QA-7000 rear view

• Image: Sansui QA-7000 original instruction manual for operation

Reports

• External link: Hifi Studio review: [2]

• External Link: "Stereo Raven" restoration report: [3]

Links

• External link: "Hifi Archive" website: [4]

• External Link: "Audio Database" website: [5]

• External link: "Audio Heritage, Japan" website: [6]