This vintage 1954 Fender Tweed Pro-Amp with a 15" Jensen alnico 5 speaker came in sounding muffled and flabby. It was OK at low volumes, but turned to mush as soon you turned it up. Now it has had active tube-gain control, and a 5-position rotary high-pass selector switch added. The switch was mounted in one of the instrument jack positions (jack removed). The active gain control is in the microphone volume slot. No longer is this amp strictly a one trick pony. By adjusting gain, volume, and high-pass frequency, this amp can be effectively dialed in to a broad variety of ear-pleasing tones.

This Boss OS-2 Overdrive/Distortion pedal has had the clipping diodes changed to a combination of germanium, LEDs, and silicon to smoothen out tone and make the response more tube-like, the distortion circuit mids have been increased (they were very scooped), the overdrive level has been increased (making it louder and more articulate), the tone control has been fine-tuned, and the red indicator LED has been replaced with a blue one (purely for looks). The tone is more full (less scooped), making it sound more 'real' than before. It is capable of driving a tube amp's front-end nicely, without getting mushy. Satisfying, with creamy sounding lows, and sustaining leads (set as in photo).

This Boss SD-1 Super Overdrive has been re-voiced similarly to a tubescreamer, pure overdrive; however, a suttle harmonic 'woman tone' can be added to the mix with a flick of a switch, gently taking the clean edge off of the overdrive. This pedal is going to get a lot of use.

This Electro Harmonix Q-Tron Plus has had it's LED re-wired so that the LED comes on when you hit the switch to engage the effect, instead of staying on all of the time. Why Electro Harmonix did this??? Who knows. The pedal has also been rewired for true bypass switching, to eliminate signal loss due to loading during bypass. Lastly, the pedal's soldering was inspected, and a little re-soldering was done. Now this excellent envelope controlled filter can be considered gig-worthy.

This Traynor YCV40 has it's reverb dramatically improved, with greatly increased high-frequency splash and sparkle. Everybody that complains that YCV amps don't compare to Fender amps because of their reverb, guess again. This one does. A night and day comparison. At 4 on the dial, it surpasses anything the reverb could do before! Wow! Talk about increased dynamics! This mod should be done to everybody's YCV amp! It even has a switch added to the top panel, so that one can choose between the stock and modded reverb sounds! This is a featured mod. Please inquire.

[note: A variation of this mod can be done to just about any amp with a spring reverb! Dramatic results!]

This Morley Black Gold Basic Wah, model BWA was voiced wrong, making it sound more like a mwee pedal than a wah pedal. Now it has been revoiced for more realistic wah tonality, similar to a Crybaby wah pedal, and has had a low frequency control knob added, so you can adjust how low the frequency goes when the pedal is rocked back, effectively altering the taper of the wah sound. A unique and original modification.

This Music Man 410-HD One fifty amplifier has the all-original LED DRIVE modification done to it's built-in overdrive circuit. The modification, which in this case was done only to channel 2, involved replacing the stock 1N914 clipping diodes in the channel 2 overdrive circuit with select LED's, and mounting a control pot for the modification into channel one's input jack 2. With the LED DRIVE set at 0, the result is a pure square wave (with pre volume at max), just like stock. Turn the dial to the right, and the distorted signal becomes progressively rounded, introducing even harmonics from the LEDs, and notching the signal (as observed on an oscilloscope). Everything from pure Music Man clean to rhythmically and harmonically brown sound. This mod can be applied to several different Music Man amps that have the same preamp circuit as the HD-150. A cool and original mod for Music Man amps.

Marshall JTM45 with Blues Breaker mods , which included replacing the stock 8551 power tubes with KT66, lowering filter cap values, and making component changes to the pre-amp circuitry. Here is what the owner of the amp has to say:

I find that the amp sounds thicker, quite a bit thicker. I used to have a very cutting sound with the bridge pickup of my LP, now I find that the bridge sounds almost like how the neck pickup used to sound and the neck pickup gives me a very rich and creamy overdrive. I used to run the amp with the treble rolled back quite a bit, but find I need to dial in a bit more now to compensate. Now, I do all my playing at home through an attenuator, so I haven’t had a chance to really open the amp up wide yet, but I can say this much, it’s definitely not as fizzy sounding with the volume cranked through the attenuator as it used to be. I don’t know if that has more to do with the component changes or the tube change, but it’s a good thing for sure.

update: Fantastic, I’m really liking the tone. It’s thick and warm and awesome.