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Blues Jr. tone stack modification kit Modify the Tone control circuit (called the "tone stack") and the gain stage for a more open and rich tone.

Not so nasal and "boxy" sounding.
Very effective and extremely musical. Everyone has loved this mod for years.

Increases bass response, sustain and control of the midrange. A real cool easy to do mod.

You will be changing parts on the circuit board. Full illustrated instructions are included.

No new circuits to assemble - detailed instructions included plus all the parts.

High qualilty Mallory caps too! This is our design, not a copy of anything else on the web.

For both the tan and green circuit board Blues Jr. amps

Blues Jr. "Blues forever" tone mod
Am3820 blues jr
final notes on web page

Dan's Legendary Book "Inside Tube Amps" is now available on Amazon/Kindle

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Torres Engineering

Sandpiper Drive

Yuba City CA 95993

this is not a "walk in" shop

I am Partially retired due to illness, but getting better!

in business 48 years