Rogue Audio Stereo 90 Super Magnum Tube Amp

An important point to keep in mind about this unit. A black faceplate is currently installed, but I also have a silver faceplate if anyone wants one.


E-mail with any questions.

Super Magnum upgrade at Rogue Factory; cost $695:
- Hex Fred diodes in bias supply - Screen grid resistors upgraded - Polypropylene bypass capacitors in filters - Bypass coupling caps - PRP resitors in all critical spots - Cardas binding posts - Cardas RCA jacks - Upgraded wiring - Upgraded small signal tubes - KT90 output tubes


Stereo 90 Spec
General Features:
Ultra-wide bandwidth output transformers Massive fully regulated high voltage supply Matched quad output tubes User selectable 4 and 8 ohm output taps User selectable triode or ultralinear output (4) KT90, (2) 6SN7, (2) 12AX7 tube complement Built in bias meter Integral tube cage Machined aluminum faceplate Mechanically isolated transformers Heavy (2 ounce) copper circuit board All precision components


Specifications:
output power: 90 WPC minimum input impedance: 200K Ohms frequency response: 5Hz - 50KHz ± 1dB THD: <0.1% typ., <1.0% at rated power input sensitivity: 1.0V RMS dimensions: 18"W x 15¾"D x 7"H weight: 60 lbs. power requirements: 115/230V - 50 - 60Hz


I took this unit in via trade from the first owner. The first owner had the super magnum upgrade done at Rogue. Comes with the original tubes (KT90, 6SN, 12ax7) with about 100 hours of use. This amp is very powerful putting out 90 watts in ultralinear mode and 45 watts in triode. The amplifier won the 2013 TAS Editors choice award for "a rich treble with a gutsy bass and a clarity unusual in its class".