Crimson 275 Stereo Tube Power Amplifier


  • 75 x 75 watts into 8 ohms

  • Under 2-ohm capability

  • Tubes

    • 12AX7 x 2

    • 12AT7 x 1 (part of DC Restorer circuit)

    • 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

  • Crimson hand-rubbed finish

  • Convection cooling




Rated Power:
More than 75 Watts Per Channel, minimum, typically 90 watts, both channels driven at eight ohms, from 20Hz to 20kHz with no more than 1% total harmonic distortion. Distortion decreases at lower levels.

4Ω       75 Watts Per Channel

8Ω       75 Watts Per Channel

16Ω     60 Watts Per Channel


Frequency Response:
+0, -3dB from 16Hz to 35kHz.; Flat 20Hz – 20kHz ±0.25dB


Less than 1.0%


Power Bandwidth:
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


Source Impedance:
1.7 ohms


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.