Difference between revisions of "Pioneer A-656 MK II"

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Eccellente e grosso amplificatore integrato della prestigiosa serie REFERENCE STEREO AMPLIFIER tra i modelli di punta di casa Pioneer negli anni '90, modello A 656 MK II, l'ultima e più recente versione uscita, in (meno diffusa e più rara) versione color argento, molto bello ed elegantissimo, fratello dei celebri A 757 ed A 858, eccezionali amplificatori dalle prestazioni HI END che non avevano nulla da temere dalla concorrenza anche la più blasonata!! Costruzione robusta e grandi prestazioni, generoso dissipatore a nido d'ape in alluminio,Potenza DIN sui due canali 120 Watt su 4 Ohm; 80 Watt su 8 Ohm,quindi avrete tanta potenza disponibile e...tutti Watt REALI....sembrano molti molti di più.....non come le amplificazioni di plastica di oggi; fattore di smorzamento 8 Ohm: 200/70(da 1 kHz/20 Hz a 20 kHz), peso di circa 14 Kg!!! Dimensioni L x P x H 420 x 435 x 162 mm. Suono tipico Pioneer, dinamico, aperto e limpido,molto apprezzato da sempre. Solo pochissimi segni e poco visibili e in maggior parte sul coperchio superiore, molto bello, come da foto, interno pulito e ordinato.
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== Data ==
 +
'''General'''
 +
* Manufacturer: [[Pioneer]]
 +
* Model: A-656 MK II
 +
* Type: Integrated amplifier
 +
* Years of manufacture: 1990 - 1992
 +
* Made in: Japan
 +
* Colors: Black, Silver (A-656-G MK II)
 +
* Remote control: No
 +
* Power consumption: 650 W max.
 +
* Dimensions: 420 x 162 x 435 mm (WxHxD)
 +
* Weight: approx. 14 kg
 +
* Original price approx.: 800 DM
 +
 
 +
 
 +
'''Connections'''
 +
* Number of inputs:
 +
** 1x Phono (Cinch): 2.5 mV / 50 kOhm (MM), 0.2 mV / 100 Ohm (MC).
 +
** CD, Tuner, Line, 3x Tape In (Cinch): 150 mV / 50 kOhm
 +
* Number of outputs:
 +
** 3x Tape Out (Cinch): 150 mV / 2,2 kOhm
 +
** Headphones (6,3mm jack)
 +
** 2 pairs of loudspeakers
 +
 
 +
 
 +
'''Technical Data'''
 +
* Continuous power (at distortion factor)
 +
** 8 Ohm: 2x 80 W (0.005%)
 +
** 4 Ohm: 2x 120 W (0.008%)
 +
** 2 Ohm: 2x 160 W (0.008%)
 +
* Dynamic power
 +
** 8 Ohm: 2x 140 W
 +
** 4 Ohm: 2x 200 W
 +
** 2 Ohm: 2x 260 W
 +
* total harmonic distortion: 0.008%
 +
* Attenuation factor: 200 / 70 (8 Ohm, 1 kHz / 20 - 20 kHz)  
 +
* Frequency response: 5 - 80,000 Hz (0.05%, 8 Ohm)
 +
* Signal to noise ratio: 95dB / 77dB
 +
* Stereo channel separation:
 +
* Tone control:
 +
** Bass: yes, ±8db (100 Hz).
 +
Treble: yes, ±8db (10 kHz)
 +
* Loudness: yes, +5 db (100 Hz)/+3 db (10 kHz)
 +
* High Filter: no
 +
* Low Filter (Subsonic): yes, 17 Hz (12 db/oct.)
 +
* Mute: no
 +
* Direct/Line-Straight: yes
 +
 
 +
== Remarks ==
 +
* Previous model:
 +
* [[Pioneer A-656]]
 +
 
 +
 
 +
* Successor model:
 +
* [[Pioneer A-676]]
 +
 
 +
 
 +
* Other models in the same series:
 +
* [[Pioneer A-227]]
 +
* [[Pioneer A-337]]
 +
* [[Pioneer A-447]]
 +
* [[Pioneer A-656 MK II]]
 +
* [[Pioneer A-757 MK II]]
 +
* [[Pioneer A-858]]
 +
 
 +
 
 +
== Pictures ==
 +
* Excerpt from Test: Denon PMA-860, Dual CV-5670, Pioneer A-656 II, Sony TA-F 550 ES
 +
[[File:Denon PMA-860-Test-1990.jpg]]
 +
 
 +
 
 +
== Reports ==
 +
* Report in "FonoForum" 7 / 1991
 +
 
 +
 
 +
* External differences to the A-656: smaller knobs replaced by cylindrical versions resembling the large knobs.
 +
* Golden dot ''only'' on the volume potentiometer.
 +
* Inside: still horizontal circuit boards, but already no honeycomb housing around the volume potentiometer at the back right of the unit anymore
 +
 
 +
 
 +
== Left ==
 +
 
 +
 
 +
[[Category:Integrated amplifier]]

Latest revision as of 03:32, 7 April 2021

Data[edit]

General

  • Manufacturer: Pioneer
  • Model: A-656 MK II
  • Type: Integrated amplifier
  • Years of manufacture: 1990 - 1992
  • Made in: Japan
  • Colors: Black, Silver (A-656-G MK II)
  • Remote control: No
  • Power consumption: 650 W max.
  • Dimensions: 420 x 162 x 435 mm (WxHxD)
  • Weight: approx. 14 kg
  • Original price approx.: 800 DM


Connections

  • Number of inputs:
    • 1x Phono (Cinch): 2.5 mV / 50 kOhm (MM), 0.2 mV / 100 Ohm (MC).
    • CD, Tuner, Line, 3x Tape In (Cinch): 150 mV / 50 kOhm
  • Number of outputs:
    • 3x Tape Out (Cinch): 150 mV / 2,2 kOhm
    • Headphones (6,3mm jack)
    • 2 pairs of loudspeakers


Technical Data

  • Continuous power (at distortion factor)
    • 8 Ohm: 2x 80 W (0.005%)
    • 4 Ohm: 2x 120 W (0.008%)
    • 2 Ohm: 2x 160 W (0.008%)
  • Dynamic power
    • 8 Ohm: 2x 140 W
    • 4 Ohm: 2x 200 W
    • 2 Ohm: 2x 260 W
  • total harmonic distortion: 0.008%
  • Attenuation factor: 200 / 70 (8 Ohm, 1 kHz / 20 - 20 kHz)
  • Frequency response: 5 - 80,000 Hz (0.05%, 8 Ohm)
  • Signal to noise ratio: 95dB / 77dB
  • Stereo channel separation:
  • Tone control:
    • Bass: yes, ±8db (100 Hz).

Treble: yes, ±8db (10 kHz)

  • Loudness: yes, +5 db (100 Hz)/+3 db (10 kHz)
  • High Filter: no
  • Low Filter (Subsonic): yes, 17 Hz (12 db/oct.)
  • Mute: no
  • Direct/Line-Straight: yes

Remarks[edit]




Pictures[edit]

  • Excerpt from Test: Denon PMA-860, Dual CV-5670, Pioneer A-656 II, Sony TA-F 550 ES

Denon PMA-860-Test-1990.jpg


Reports[edit]

  • Report in "FonoForum" 7 / 1991


  • External differences to the A-656: smaller knobs replaced by cylindrical versions resembling the large knobs.
  • Golden dot only on the volume potentiometer.
  • Inside: still horizontal circuit boards, but already no honeycomb housing around the volume potentiometer at the back right of the unit anymore


Left[edit]

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