Hi all, The more I read the less I know. I recently purchased two used/demo cabs from Dr. Bass, and they sound awful. I cannot figure out why. One has a Bp102, and an Alpha 8MR and a tweeter. It came with the tweeter feed wired to pins 2+ and 2- to bi-amp with my GK head. Unfortunately it was also severely distorted at any volume. As per advice from another TB'r, I re-attached the tweeter leads to the (3-way) x-over and the distortion was replaced by hiss. Other cab has a 12" Alpha 12LFA, and a tweeter, the filter network has no inductor, so I assume it's only a high pass, though I don't know at what frequency. It basically just sounds distorted/farty on any note played on the E string (as does the other cab). It was not wired to bi-amp. Marc Serio (Dr. Bass) claims he replaced (upgraded)the 10", 8" mid, and the 12" (Which I believe because they were not spec), and so I think they may just need to be broken in, but don't really know. I'm $500 into these things and can't stand the way they sound. I'm even contemplating building new boxes because he mounted the speakers with plain old wood screws, and may have torqued the frames (I'll be checking that later today). I also plan on running woofers and tweeter only with the GK bi-amp, thereby bypassing the passive x-overs to see if taking them out of the signal path makes any improvement. Otherwise I'm running out of ideas for a diagnosis. Any help is appreciated.