The Crimson 275 can be used as a mono amplifier capable of 150 watts.


  • 75 x 75 watts into 8 ohms
  • Under 2-ohm capability
  • Tubes

12AX7 x 1

12AT7 x 2

Tung-Sol KT120 x 4

Output Transformer

Proprietary design with hand-wound, interleaved windings of copper and silver on a steel core; low leakage inductance, super wide band

Four-function meter

  • Bias setting (in conjunction with rear panel control)
  • Tube Tester (tests at actual voltage and current conditions)
  • Tube Matcher (cool, but not really necessary)
  • VU Meter

Rear Panel

  • Power Switch
  • IEC AC Input Socket
  • Line Fuse
  • Tube Fuse
  • Recessed Tube Bias Control
  • 5-way binding post outputs
  • Gold-plated 5-way binding posts
  • Gold-plated RCA inputs

Baked Crimson Finish

Convection cooling


Rated Power:
More than 75 Watts Per channel at eight ohms, @1kh with no more than 1% total harmonic distortion typically into loudspeaker loads. Distortion decreases at lower levels.

4Ω 75 Watts Per Channel

8Ω 75 Watts Per Channel

16Ω 60 Watts Per Channel

Frequency Response:

 20Hz – 20kHz ±0.5dB into typical loudspeaker loads.


Less than 1.0%


24 Hz to 28 kHz without filters

Line Inputs:

Gold-plated RCAs

Speaker Outputs

Gold-plated 5-way binding posts

Input Impedance:

100 Kohms (RCA)


29 dB (8 ohms)

Tube Complement:

One 12AX7, two 12AT7’s, four KT120’s (optional: KT88 or 6550)

Hum and Noise:

Better than 100 dB below 75 Watts, A-weighted.


Rear panel potentiometer adjust, front panel meter

Output Transformers:

Interleaved windings, super wide-band, low leakage inductance, proprietary design



Sparkle Burgundy Red


14" x 7" x 9.5" (W x H x D) / 19 lbs

Country of Origin:

United States of America

Chassis and Tube Warranty:

5 years

Specifications subject to change without notice.

Delivered with KT 120 tubes for 75 Watts per channel. Ultra-stable

Hand crafted in the USA

5-year Warranty including tubes

Call to check stock or scheduled delivery

Free shipping in the continental USA

Bob Carver Crimson 275 Stereo Compact Tube Amp