Rocktron Basix Bass Preamp Do they make good stuff? I have an opportunity to puchase this unit really Cheap, (50 bucks). As usual, being the neophyte that I am, I know nothing about it. I would hope to use it as a preamp for say Carvin DCM 1000 or maybe some other P A amp to amplify my bass. Any recomendations. Would it work for this and is it a good unit? It must be an older as I can't even find it listed at the Roctron web site. Any info/opinions appreciated.