Anyone else own this funky little box ? Seeing as all my basses are passive, this little thing certainly gives me alot more sound at gigs. I bought it off a friend second hand, with no form of instructional booklet or guide.. 1)Can anyone tell me what the "Phantom Ground Connect" switch does? It doesnt seem to make a difference when its on or not.. And also.. 2) When I have "Blend" turned up on full on my practise amp (250 watt Laney), I get very bad muddy sound out of my bass...(This also happened when I was recording too)....but at gigs, I seem to get a much better sound when Blend is turned all the way up. Why could this be? Also, what are you general opinions about the Sans-amp, in comparison to other bass pre-amps ?