Denon

Denon POA-5000 New Optical Class A 6CH power amplifier

Description

Denon POA-5000

 

In year 1991 Denon introduced a great multi-channel (6CH) power amplifier Denon POA-5000. At that time, it was a state of art amplifier, which utilized the newly developed technology called the New Optical Class A. Obviously the gear was made in Japan and was in production until the year 1996. The matching preamplifier is called AVR-5000.

 

 

  • luxurious finish, with a massive aluminum face plate and just 2 lights, that show the amp’s operation mode;
  • beautiful champagne colour;
  • very well finished, multidimensional Denon badge;
  • even the power button is made out of aluminum and not plastic;
  • feet in gold;
  • no IR sensor, however it can be put on standby with a remote cable (trigger);
  • every output section (front, center, rear) can be bridged to mono completely independent (minimum speaker impedance in monomode is 6Ω); therefore it can operate in one of the following modes: 6CH, 5CH, 4CH, or 3CH;
  • every section has it’s own input level potentiometer, which makes it possible to connect the amp directly to the source, it also solves the problem with impedance mismatch;
  • the guts of the amp are mounted in a very rigid, copper-plated chasis;
  • the power supply consist of a huge toroidal transformer, that sits in a metal can;
  • there are 8 main power capacitors, 2 of them were brought by Elna Silmic, total capacity is 4x8200µF + 4x12000µF = 80800µF;
  • every section of the amp is well separated from each other;
  • 2 independent heat-sinks successfuly distribute the heat from a total of 16 power transistors;
  • Takamisawa relays.
  • it weights 24kg and has a power consumption of 550W;
  • “Spitzenklasse”” in Stereo 9/1992.

Retail price in Japan in 1991: 200000¥
Retail price in Germany in 1992: 2700DM

Pictures

Technical specification

  • Output power (20Hz – 20kHz, THD 0,02%):
    • Stereo mode :
      • Front – 2 x 150W / 2 x 100W
      • Center – 2 x 75W / 2 x 50W
      • Rear – 2 x 75W / 2 x 50W
    • Mono mode (6Ω / 8Ω):
      • Front – 1 x 300W / 1 x 200W
      • Center – 1 x 150W / 1 x 100W
      • Rear – 1 x 150W / 1 x 100W
  • THD (all channels @ 6Ω / 8Ω) – 0,008% / 0,05%
  • Cross modulation distortion (all channels) – 0,005%
  • Output bandwidth (8Ω, 0,05% THD) – 5Hz – 50kHz
  • Frequency response:
    • stereo mode: 1Hz – 100kHz
    • mono mode: 2Hz – 80kHz
  • Input sensitivity:
    • Stereo – 1,0Vrms
    • Mono – 0,7Vrms
  • Input impedance:
    • Stereo – 47kΩ
    • Mono – 47kΩ
  • Output impedance:
    • Stereo – 0,08Ω
    • Mono – 0,16Ω
  • Signal-to-noise ratio (A-weighted):
    • Stereo – 118dB
    • Mono – 113dB
  • Power consumption – 550W
  • Dimensions (W x H x D)- 434 x 185 x 415 mm
  • Weight – 24,2kg

Reviews


In the new optical class A circuit, sound quality which was excellent in no one but [ Class-A ], and high efficiency are realized by [ with a general pure listening power level ] carrying out magnification operation as a Class-A.
Moreover, by “optical combination” which transmits the control signal from a bias control circuit to a bias circuit, while eliminating completely interference between the main signal system and a bias controlling circuit, high speed-ization of bias control is realized by using an optical element.


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