Truetone Clean Boost is the Perfect way to push the front end of your tube amp. Then again, it's also a great way to push a good overdrive pedal a bit harder. If you like the tone you already have from another pedal, just put Truetone after that pedal for a volume boost... great for a solo boost or to make a certain part stand out. Punch in and punch out without affecting your tone.
The Truetone can get up to a 15dB boost, completely clean. So, if you're looking for a true clean boost and not a dirty boost, your search will end with Truetone.
Works great on bass too!