Aitos EV 902

Data per monoblock

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

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

Links

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