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SUBSTI-TUBE 928-PR Duet Power Reducer Class A converter


MSRP - $120.00

SUBSTI-TUBE 928-PR Duet Power Reducer Class A converter Description

An adapter which allows class A/B amplifiers such as Marshall and Fender, to replace their output tubes with the EL-84 tube, and operate in class A.  This reduces the power of the amplifier.  In the case of a 100 watt amp, the output will be about 40 watts.  In a typical 50 watt amp, the power will be about 20-25 watts.

These are used in pairs or quads, not individually.  These are NOT for use in Class A amplifiers.  For Class A amplifiers, please use the 928, not this 928-PR.

These will reduce the load on your power transformer, and allow your amp to reach distortion, with a nice AC-30 or EL-84 sound and feel at levels that are lower and more friendly to recording and venues where your amp will not feel, play, or distort at the amplifier's normal higher sound levels.

Dimensions - tube tip to amp chassis requires 4 1/4".

These should not be use in amplifiers with over 490 plate volts

 

Additional Files
Images   (click on link to view)
928PR duet
928PR duet in Fender Amp
PDF   (click on link to view)
928-PR Instruction Manual
928PR review