Well, I purchased a Peavey Tour 410 cab and a Tour 115 cab. I also purchased a BBE BMAX tube preamp. I ran that through a 400 watt amp. Everything is hooked up correctly. Sitting around the apartment of course I had to keep the volume down for practice. I loved the tone I was getting with my 78 Jazz. Well, I had my first gig with this set up. I got the worse tone I have ever had. With the bass turned almost all the way off on the BMAX the low notes were just booming and you could hardly hear the higher notes. I tried everything with the b max. Turning off the " sonic maximizer", turning off the compressor. Nothing seemed to help. I could not get any kind of respectable balance on my bass. It was horrible. I purchased the BMAX used from Guitar Center and it seemed to work ok in the house at low volume. I have never used this rig before out of the apt. I don't know if it's something wrong with one of the speaker cabs, the combination of the cabs or something with the BMAX. I should have tried using just one of the cabs at the gig but didn't think of that. Anyone ever run into this sort of thing ?