Difference between revisions of "Akai AS-980"

 
 
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Form
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__NOTOC__
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FM/AM synthesis stereo amplifier
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== Data ==
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<FM tuner part>
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{{navigation}}
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Received frequency / IF frequency
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'''General'''
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76MHz - 90MHz/10.7MHz
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* Manufacturer: [[Akai]]
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Sensitivity (IHF)  
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* Model: AS-980
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2.0 microvolts
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* Type: Quadrophonic Receiver
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THD
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* Years of manufacture: 1973 - 1975
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mono: 0.3% or less
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* Made in: Japan
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stereo: 0.5% or less
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* Color: silver, wooden case walnut
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S/N ratio
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* Remote control: yes, cable remote control
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70dB or more
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* Power consumption: 480 watts max.
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The degree of selection
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* Dimensions: 650 x 155 x 365 mm
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70dB or more
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* Weight: 20,5 Kg
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Image ratio
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* Original price approx.: 200'000 Yen (Japan, 1973), 2'980 DM
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85dB or more (84MHz)  
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−
IF disturbance ratio
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100dB or more (84MHz)
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'''Connections:'''
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Spurious
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* Number of inputs:
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34dB or less
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** Phono 1: 3 mV, 50 kOhm, 130 mV max.
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Antenna input impedance
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** Phono 2: 3 mV, 50 kOhm
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A 300-ohm balance type, a 75-ohm balance type
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** Microphone: 3.8 mV, 50 kOhm
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Stereo separation
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** Media Interface: 3 mV, 50 kOhm
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40dB or more
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** AUX 1, 2: 150 mV, 100 kOhm
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Capture ratio (IHF)
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** Tape Play 1, 2: 150 mV, 100 kOhm
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2.0dB
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Main In: 500 mV, 50 kOhm
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<AM tuner part>
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Coaxial FM antenna connection (75 Ohm)
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Received frequency
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** AM antenna connection (300 Ohm)
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535kHz - 1605kHz
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* Number of outputs:
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Sensitivity (IHF) Dummy
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** Tape Rec 1, 2: 150 mV
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10dB/one MHz (400Hz, 30%Mod)
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Pre Out: 500 mV, 4.5 V max.
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Image ratio  
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** 4 x loudspeaker pairs: 2 x front, 2 x rear
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80dB or more (1MHz)  
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** 2 x headphone outputs front + rear: 6.3 mm jack each
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IF disturbance ratio
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75dB or more (1MHz)  
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The degree of selection
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'''Technical Data:'''
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35dB or more
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−
AM distortion
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'''Amplifier:'''
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1.0% or less
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* continuous power: quadrophonic, 20 Hz - 20 kHz
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S/N ratio  
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** 8 Ohm: 4 x 30 Watt
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50dB or more (400Hz, 30%Mod)
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4 Ohm: 4 x 40 Watt
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<Amplifier part>
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* music power: quadrophonic, 20 Hz - 20 kHz
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Output
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8 Ohm: 170 W
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Music power :  
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** 4 Ohm: 220 W
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220W (4ohms)
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* Total harmonic distortion: &lt; 0.05 % at rated power
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170W (8ohms)
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* Attenuation factor: 50 at 8 ohms, 1 kHz
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Continuous cruising power :  
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* Frequency response:
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40W+40W (4ohms)
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** Phono RIAA: 20 Hz - 50 kHz (8 ohms), ± 1 dB.
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30W+30W (8ohms)
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** High level: 10 - 60'000 Hz ± 3 dB
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THD
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* Signal-to-noise ratio:
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0.05% or less (8ohms)
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** Phono: &gt; 75 dB
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Output bandwidth (IHF)
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** Line: &gt; 90 dB
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20Hz - 50kHz (8ohms)
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* Tone control:
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Frequency response
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** Bass: ± 10 dB at 100 Hz
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10Hz - -60kHz three dB  
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Treble: ± 10 dB at 10 kHz
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Input sensitivity/impedance
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* Loudness: + 8 dB at 100 Hz, + 5 dB at 10 kHz
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Phono: 3mV/50kohm
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* Low Filter (Subsonic): - 5 dB at 50 Hz (6 dB / octave)
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AUX, Tape Monitor(Din/Pin):150mV/100kohm
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* High Filter: - 6 dB at 10 kHz (6 dB / octave)
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Media-Interface-Connector: 3mV/50kohm
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Muting: - 20 dB
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An input-proof [ Phono ]  
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130mV(1kHz)1%
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Equalizer
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'''CD-4 Demodulator section:'''
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RIAA±1dB
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* Input sensitivity: 2.5 mV
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Tone control
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* Input impedance: 100 kOhm
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Bass: 100Hz±10dB
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* Distortion factor: 0,07
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Treble: 10kHz±10dB
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* Signal-to-noise ratio: &gt; 70 dB
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Loudness control
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* Channel separation at 1 kHz:
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(Volume -30dB)
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** Left to Right: 50 dB
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100Hz:+8dB
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front to rear: 30 dB
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10kHz:+5dB
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* Frequency range: 20 - 15'000 Hz
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Filter
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High cut filter: -6dB, 10kHz
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Low cut filter: -5dB, 50Hz
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'''Tuner:'''
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Dimensions
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* Reception: FM, AM
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Width 650x height 155x depth of 365mm
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* Frequencies:
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Weight
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** FM: 87.5 - 108 MHz
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20.5kg
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** MW: 525 - 1605 kHz
 +
* Input sensitivity:  
 +
** FM: 2.0 µV
 +
** MW: 10 µV
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* Frequency response: 20 - 15'000 Hz
 +
* Distortion factor FM: Stereo &lt; 0.5 %, &lt; Mono 0.3 %
 +
* Signal-to-noise ratio:
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** FM: 70 dB
 +
** AM: 50 dB
 +
* Stereo channel separation: &gt; 40 dB at 1 kHz
 +
* Selectivity:
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** FM: 70 dB
 +
** AM: 35 dB
 +
* Co-wave selection: 2.0 dB
 +
* Spurious wave selection: &gt; 70 dB
 +
* Image frequency attenuation:
 +
** FM: &gt; 85 dB
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MW: &gt; 80 dB
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IF attenuation:
 +
** FM: &gt; 100 dB
 +
** MW: &gt; 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|Introduction Kenwood 4-channel playback technology]]
 +
 
 +
 
 +
== Pictures ==
 +
* Extract from brochure: Akai AS-980
 +
[[File:Akai AS-980-Prospekt-1.jpg]]
 +
 
 +
 
 +
* Excerpt from advertisement: Akai GX-280 D-SS with Akai AS-980
 +
[[File:Akai AS-980-280D-SS-1.jpg]]
 +
 
 +
 
 +
== Reviews ==
 +
 
 +
 
 +
 
 +
== Links ==
 +
 
 +
 
 +
[[Category:Receiver]]

Latest revision as of 01:32, 6 November 2020

Data[edit]

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[edit]



Pictures[edit]

  • Extract from brochure: Akai AS-980

Akai AS-980-Prospekt-1.jpg


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

Akai AS-980-280D-SS-1.jpg


Reviews[edit]

Links[edit]

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