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Koch ATR4502 90W Stereo Rack-Mounted Tube Guitar Power Amp  Black 

(Black)  Sku #L45687000001000

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This vintage-minded stereo tube power amp will make your modeling rig sing.

The ATR4502 is the first 2 x 45W stereo or 1 x 90W mono 19” rack mount power-amp for guitar on the market that offers real vintage tube tone in combination with only 1U of height and weighing but 12 lbs.

The ATR4502 is the preferred amplifier of leading manufacturers of profiling amplifiers/impulse response systems. It can be used either in stereo or mono mode, without having a stereo / mono (bridged) selector switch. Just plug your speaker or speaker cabinets into the stereo or mono speaker output jacks, and the ATR4502 automatically switches to either stereo or mono operation. Beside two Volume controls (one for each channel), the ATR4502 offers two voicing switches per channel for boosting Presence and Depth frequencies.

Further features of the ATR4502 include input level selectors (-10/0dBV), two speaker output jacks per channel, two thermal controlled cooling fans, short circuit protected outputs and overheat protection circuits with overload indicators on the front panel. The ATR4502 offers unique, totally analog, full class-A circuitry for the best dynamic response and tone, and is designed to deliver maximum guitar sound quality in a small and light-weight 19” housing. The ATR 4502 will drive any speaker cabinet with an impedance between 4 and 16 Ohms in the stereo mode, and between 8 and 16 Ohms in the mono mode, with only minor differences in output power.


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ATR4502 90W Stereo Rack-Mounted Tube Guitar Power Amp Specifications:

  • Power mono: 90 W (8 Ohm), 70 W (16 Ohm)
  • Power stereo: 2 x 50 W (4 Ohm), 2 x 45 W (8 Ohm), 2 x 35 W (16 Ohm)
  • Tubes: two 12AX7 (one for each channel)
  • 19 inch rack-mounted, 1U high
  • Weight: 12.12 lb. (5.5 kg)
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