Please forgive my ignorance! I have a Trace amp with active/passive selector on the input. I have always assumed that, since both my basses need a battery, I should select 'active'. But I have read that my Streamer $$ has passive pickups. Should I select 'passive'? To confuse the issue, what if I use a footpedal? Should I select 'active' or 'passive'? I am considering buying a practice amp (Warwick Take12) but notice that it doesn't have active/passive selection (although the cheaper Blue Cab amps do). Is this important? Thanks in advance.