Aitos EV 902

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Data per monoblock[edit]

General

  • Manufacturer: Aitos
  • Model: EV 903
  • Type: OTL-tube monos
  • Years of manufacture: from about 2006 (EV901) to now (EV903)
  • Made in: Netherlands
  • Colour: Black
  • Type: Analog
  • Remote control: connector for switching the amplifier on and off via AITOS tube preamps
  • Power consumption:
    • Standby: 0W
    • Idle: 130W
    • Full power: 500W
  • Dimensions (WxHxD): 50cm x 20cm x 42cm
  • Weight: 23kg per amplifier
  • New price approx.: 20.000€ per pair


Connections

  • Number of inputs: 1
  • Chinch gold plated: 270kOhm 1,5V eff.
  • Number of outputs: 2 (parallel)
    • LS-Stereo A: 6 to 14 Ohm automatic adjustment
    • LS-Stereo B: 6 to 14 Ohm automatic adjustment


Technical Data

  • Continuous power (at distortion factor)
    • 10 Ohm: 250W
  • Dynamic power
    • 8 Ohm:
    • 4 Ohm:
  • Total harmonic distortion: <0,1%
  • Dämpfungsfaktor: >160
  • Frequency response: 8Hz - 225kHz -3db
  • Signal to noise ratio: >100 db
  • Stereo channel separation: Dependent on preamplifier


Special features of tube amplifiers

  • Principle: OTL-tube power amplifier
  • Tube equipment

6 power tubes

    • 3 double triodes

1 pentode

  • Transformers: Two power supply transformers and one transformer for the automatic switching circuitry
    • High voltage
    • Auxiliary voltage/heating

Switch-on electronics: Switch-on is done by an automatic switch, which - and only after the tubes have reached a certain temperature - switches on the high voltage completely noise- and click-free.


Special Features

  • Diagnostic socket (service) for checking the internal voltages
  • Input connector for switching the power amplifier on and off via AITOS tube preamplifiers
  • Led indicators for remote control and fuse fault indication
  • A built-in mains phase control
  • Three-dimensional wiring
  • Anode voltage delay on power up
  • Built-in hour meter

Remarks[edit]

Other models in the same series: Aitos OTL power amplifier EV 803 (90 watts).

Pictures[edit]

File:AitosEV901Front.jpg File:AitosEV901Rear.jpg

Reports[edit]

Links[edit]

EV 903: [1] Aito's homepage: [2]</0,1%>