Sony STR-7800 SD

Data

General

• Manufacturer: Sony
• Model: STR-7800 SD

Type: Receiver

• Years of manufacture: 1977 - 1978
• Manufactured in: Japan
• Color: Silver, wood side panels
• Remote control: no
• Power consumption: 650 W max.
• Dimensions: 490 x 170 x 515 mm (WxHxD)
• Weight: 22.8 kg
• Original price approx.: 700 US-$, 2'250 DM

Connections

• Number of inputs:
  • Phono MM 1, 2: 2,5/5,0 mV / 50 kOhm
  • Tape Play 1, 2: 250 mV / 50 kOhm

AUX: 250 mV / 80 kOhm

• • Antenna FM (75/300 Ohm), AM.
• Number of outputs:
  • 2x Tape Out (Cinch/DIN): 250 mV / 100 Ohm (Cinch); 30 mV / 80 kOhm (DIN).
  • FM Discri: 250 mV, 2.5 kOhm
  • Headphones (6.3 mm jack, front)
  • 3 pairs of loudspeakers

Technical Data

Amplifier

• Continuous power
  • 8 Ohm: 2x 125 W (RMS, both channels, 20-20,000 Hz, 0.07 %)
  • 4 Ohm:
• Dynamic power
  • 8 Ohm:
  • 4 Ohm:
• Total harmonic distortion: 0.07% (at rated power)
• Attenuation factor: 40 (8 Ohm)
• Frequency response:
  • Phono: 20 - 40'000 Hz (+0/-0.2 dB).

High level: 10 - 30'000 Hz Signal-to-noise ratio:

• • Phono MM: 72 dB
  • AUX, Tape: 90 dB
• Tone control:
  • Bass: ± 10 dB at 100 Hz

Treble: ± 10 dB at 10 kHz

• Loudness: + 10 dB at 50 Hz, + 3 dB at 10 kHz
• Acoustic Compensator:
  • Bass: + 9 dB at 50 Hz

Mids: + 3 dB at 1 kHz

• High Filter 1: - 6 dB at 5 kHz
• High Filter 2: - 6 dB at 10 kHz
• Low Filter (Subsonic) 1: - 6 dB at 25 Hz
• Low Filter 2: - 6 dB at 50 Hz
• Mute: - 20 dB

Tuner

• Reception: FM, MW
• Frequencies:
  • FM: 87.5 - 108 MHz

MW: 525 - 1605 kHz

• Frequency response: 30 - 15'000 Hz (+0.2 dB / -1.5 dB, FM)
• Input sensitivity:
  • FM: 1.7 µV (IHF)
  • MW: 100 µV

Distortion factor:

• • FM: 0.2% (mono), 0.3% (stereo).
• Signal-to-noise ratio:
  • FM: 73 dB (mono), 68 dB (stereo)

MW: 50 dB

• Channel separation:
  • FM: 40 dB (at 1 kHz)
• Selectivity: (IHF)

FM: 83 dB

• • MW: 35 dB
• Equal wave selection:
  • FM: 1.0 dB
• Spurious wave selection:
  • FM: 80 dB
• Image frequency attenuation:
  • FM: 75 dB
  • MW: 40 dB

IF attenuation:

• • FM: 100 dB
  • MW: 35 dB
• AM suppression: 54 dB

Special Features

• Acoustic Compensator

Remarks

• Other models in the same series:
• Sony STR-1800
• Sony STR-2800 L
• Sony STR-3800 L
• Sony STR-4800
• Sony STR-5800
• Sony STR-6800 SD
• Sony STR-7800 SD

Pictures

• Excerpt from US advertisement: Sony STR-7800 SD