I've had one these things in my parents basement in Jersey for years. There was something wrong with the power supply, and I pretty much stopped playing BG, so I haven't used it since halfway through college when it broke down.
For DB amplification, I moved on to the little GK 150 combos. I had a 150E I could never get a good sound out of without totally bypassing the pre-amp with an external unit like the Fishman pro platinum. I got a GK 150S after, and while it was better voiced for DB, it still had some major twang, finger noise, and brittleness issues, even with an Fdeck in front and guts and/or Velvets on the bass. My pickup is a (middy) bassmax, which may have something to do with it. When I bypassed the internal preamp and ran an outboard, it sounded great but lacked some headroom. I was also very frustrated with having to lug around a 5 pound preamp to get my "compact" GK usable. Maybe I just don't dig that sound? Sold them both and have been living off of backline for about a year now, just going DI or using backline amps (everywhere in NYC) with my Fishman.
Last weekend, I had a loud gig featuring a drumset where I arrived to find that I forgot my preamp. Crap. On top of that, the sound guy wants me to just plug into the house amp, which is pretty much a nightmare situation. What amp do they have there? My old buddy the Ampeg B100R. I plugged straight in, hit the mid cut, and held my breath.
The amp performed just wonderfully. No, it doesn't sound much like my acoustic DB but it gave a warm, usable sound I liked a lot! No rumble, no boom, and no feedback. On an amp with 500kOhm imput, no high pass filter, and a 15 inch speaker! I think the combination of the bassmax, mid cut button, and Ampeg B100R is a winner for a nice (though no exactly neutral) bass tone. I bet with an Fdeck in the chain, it could get really loud without any feedback. Much more pleasant than the GK stuff, with my bass and pickup anyway. For the rootsy, old school sound I dig, I'd rather have it warm than brittle. Straight-Ahead jazzers going for "my bass, louder" will want a little bit more string noise and transparency. Also, its huge and somewhat underpowered by today's standards. 70 pounds and 100 watts.
Needless to say, I'm picking up mine from the repair shop tomorrow. I don't know if I would recommend someone specifically seeking out this setup, but I'm sure glad I fell into this rig.