Hey everybody....I purchased a set of Bartolini's to replace the funky stock Carvins in my LB75 Bass I got the 59s72L1-LN1 Pick up set plus the Aguilar OP Preamp. Purchased from Brian at BBG I had someone a "Local Music Store" in Melville, New York install them because they were highly recommended and they said they could do it no problem. There was an 8 day turn around, which is normal, depending on who you use......I pick my Bass up head right to rehearsal, plug it in and nothing but buzzing and ground problems....in and out...on and off....crap....so I take it home, they were closed, 45 miles away, and its ok, yet something doesn't seem 100%...a little noise here and there....I call the so called tech, he says its just the grounding in the house where I rehearsed and no worries.....2 days later I take it to a lesson where I pay a really cool old Jazz cat 40 bucks an hour, it starts crapping out again....I struggle through the lesson, I immediately take it to the Store....the tech won't be in till the next day. He calls me says , pick up the bass its fine. I play it in the store , everything is cool, he says it was the input where the chord goes in......I go all the way home and guess what its still ****ed up. I call the guy...I am fuming by now....he says it must be what I thought it was....a bad pre amp...bring it in and I'll have the Amp guy check it out, The AMP GUY?....your supposed to figure this out.......I will never let these people set eyes on this bass again unless we are in court....$120.00 to install this...plus they charge 60 bucks for a set up and 31 bucks for the strings. No apologies for my time running around....never mind I am screwed all weekend for 3 gigs...I have to borrow a Squire Jazz. I am calling Brian tomorrow in hopes he can recommend a tech in New York for me to bring it too to see what the hell is going on. Anyone ever hear of a brand new Aguilar pre-amp being a lemon?