Invader Jima wrote on Jan 23rd, 2014 9:55pm
Full-size version: http://i41.tinypic.com/2dbkwes.jpg
I had an idea to utilize the unused op-amp section to add Bass and Treble controls (circuit from the Frontman 25R). To fit the extra pots you'd have to re-house the circuit (which would free up the box for a tube amp such as my Radio Champ ). I also indicated 25R values for the Mid part of the tonestack.