In this video, we go over 5 kinds of boost circuits that are commonly used in Guitar Pedals, show how they work, and see what the pros and cons are for them.

We've already covered a few in more detail.
BJT Boost/Gain:    • Guitar Pedal Mod  BJT Transistor Gain  
Inverting Op Amp:    • Guitar Pedal Mod  OpAmp Gain Part 1  
Non Inverting Op Amp:    • Guitar Pedal Mod  OpAmp Gain Part 2  

Gain to Decibels Calculator:
http://www.sengpielaudio.com/calculat...

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