TREM - Tremolo Level Tracker


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TREM provides automatic tremolo modulation depth control with Power Scale control adjustment for amps that have bias-modulated tremolo.

Note that any amp that has a specific input jack for a tremolo or vibrato channel DOES NOT require TREM when Power Scaling. This includes vintage Vox AC-30 and most Fender amps built between 1963 to presnt.

Many amps have bias-modulated tremolo, with most newer models using solid-state circuitry to generate the trem signal. These oscillator circuits cannot by Power Scaled, but their output can be controlled to track the power level set by a Power Scale control.

In the case of modern Vox amps with tremolo - or any cathode biased amp with trem - TREM can be added along with SV2 and VCK for a complete solution: SV2 provides the Power Scaling; VCK keeps tone intact at low power settings; TREM keeps the tremolo depth in correct proportion.

Fixed-biased amps with bias-modulated tremolo include the Fender Princeton / Reverb, the Traynor Guitarmate, and many others. In these amps, one extra capacitor is required with TREM to provide tremolo tracking with power level. Let us know what amp you are working on and we will include this cap if required.

TREM is very small and light and can be supported by the wiring itself, or it can be tied to the wire loom using a zip tie or similar.

About London Power

London Power was founded in 1990 by Kevin O'Connor, after two decades of research into innovative audio amplification techniques. Kevin is an audio designer, author and speaker, known for his proprietary methodology called Power Scaling, and for his eleven books on audio subjects. Whether you seek amps, kits or information, you'll find useful answers here on not just the "how" but the "why" of audio amplifier design. Please enjoy the information on this site, and don't hesitate to contact us with questions.

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