I use mine as a solo boost (with a footswitch) as it adds a bit (for me: just the right amount) of volume, fatness and compression. Personally I like the tone of it better than the boost side of my box of rock, any tube screamer or the EHX soul food used as a boost.
I'd like to know what goes on technically when I hit that switch just out of curiosity ...
I'd like to know what goes on technically when I hit that switch just out of curiosity ...