[quote name='HowieBass' timestamp='1419109139' post='2636755']
Lots of people use them as one link in creating their sound, you'll usually find they colour the tone so it's not simply a signal boost (and you can get clean boost pedals too). As an example the SansAmp Bass Driver DI can give you the effect of a valve amp front end where you can add warmth or grit or just a bright more modern tone - there's an inexpensive Behringer unit that does a very similar thing. A preamp pedal is one alternative to having an onboard active EQ so if you have a passive bass it's a way to get the tones you'd expect from an active instrument but there's no reason why you can't run an active bass through a preamp pedal. A lot of the pedals (SansAmp and Behringer included) allow you to direct inject (DI) straight into the front of house (FOH) amplification rig just in case your stage rig/combo doesn't have that facility. Some people choose to just run a preamp pedal on stage and take a feed through a monitor wedge so they don't have to supply any backline.
[/quote] thank you
Getting used to giging, a bit, can anybody explain a pre amp pedal, i play an active 34 musicman
through a markbass with 2 x 2,10s, . i don"t understand the pre amp thing, help, thanks