Akai AS-980

Data

General

• Manufacturer: Akai
• Model: AS-980
• Type: Quadrophonic Receiver
• Years of manufacture: 1973 - 1975
• Made in: Japan
• Color: silver, wooden case walnut
• Remote control: yes, cable remote control
• Power consumption: 480 watts max.
• Dimensions: 650 x 155 x 365 mm
• Weight: 20,5 Kg
• Original price approx.: 200'000 Yen (Japan, 1973), 2'980 DM

Connections:

• Number of inputs:
  • Phono 1: 3 mV, 50 kOhm, 130 mV max.
  • Phono 2: 3 mV, 50 kOhm
  • Microphone: 3.8 mV, 50 kOhm
  • Media Interface: 3 mV, 50 kOhm
  • AUX 1, 2: 150 mV, 100 kOhm
  • Tape Play 1, 2: 150 mV, 100 kOhm

Main In: 500 mV, 50 kOhm Coaxial FM antenna connection (75 Ohm)

• • AM antenna connection (300 Ohm)
• Number of outputs:
  • Tape Rec 1, 2: 150 mV

Pre Out: 500 mV, 4.5 V max.

• • 4 x loudspeaker pairs: 2 x front, 2 x rear
  • 2 x headphone outputs front + rear: 6.3 mm jack each

Technical Data:

Amplifier:

• continuous power: quadrophonic, 20 Hz - 20 kHz
  • 8 Ohm: 4 x 30 Watt

4 Ohm: 4 x 40 Watt

• music power: quadrophonic, 20 Hz - 20 kHz

8 Ohm: 170 W

• • 4 Ohm: 220 W
• Total harmonic distortion: < 0.05 % at rated power
• Attenuation factor: 50 at 8 ohms, 1 kHz
• Frequency response:
  • Phono RIAA: 20 Hz - 50 kHz (8 ohms), ± 1 dB.
  • High level: 10 - 60'000 Hz ± 3 dB
• Signal-to-noise ratio:
  • Phono: > 75 dB
  • Line: > 90 dB
• Tone control:
  • Bass: ± 10 dB at 100 Hz

Treble: ± 10 dB at 10 kHz

• Loudness: + 8 dB at 100 Hz, + 5 dB at 10 kHz
• Low Filter (Subsonic): - 5 dB at 50 Hz (6 dB / octave)
• High Filter: - 6 dB at 10 kHz (6 dB / octave)

Muting: - 20 dB

CD-4 Demodulator section:

• Input sensitivity: 2.5 mV
• Input impedance: 100 kOhm
• Distortion factor: 0,07
• Signal-to-noise ratio: > 70 dB
• Channel separation at 1 kHz:
  • Left to Right: 50 dB

front to rear: 30 dB

• Frequency range: 20 - 15'000 Hz

Tuner:

• Reception: FM, AM
• Frequencies:
  • FM: 87.5 - 108 MHz
  • MW: 525 - 1605 kHz
• Input sensitivity:
  • FM: 2.0 µV
  • MW: 10 µV
• Frequency response: 20 - 15'000 Hz
• Distortion factor FM: Stereo < 0.5 %, < Mono 0.3 %
• Signal-to-noise ratio:
  • FM: 70 dB
  • AM: 50 dB
• Stereo channel separation: > 40 dB at 1 kHz
• Selectivity:
  • FM: 70 dB
  • AM: 35 dB
• Co-wave selection: 2.0 dB
• Spurious wave selection: > 70 dB
• Image frequency attenuation:
  • FM: > 85 dB

MW: > 80 dB IF attenuation:

• • FM: > 100 dB
  • MW: > 75 dB
• AM suppression: 50 dB

Special Features

• 4 VU meters
• Microphone input front, mixable
• MPX Noise Filter
• FM Muting
• Bass / Tweeter control V + H separately

Remarks

• All models in the same series:
  • Akai AA-910
  • Akai AA-910 DB
  • Akai AA-920
  • Akai AA-930
  • Akai AA-940
  • Akai AS-960
  • Akai AS-970
  • Akai AS-980

• [[Introduction to Kenwood 4-Channel Playback Technology
  • Introduction Kenwood 4-channel playback technology

Pictures

• Extract from brochure: Akai AS-980

• Excerpt from advertisement: Akai GX-280 D-SS with Akai AS-980