I currently purchased a RMX 1850HD and practiced with it for the first time tonight. Before I was using an Ampeg B2R into an Ampeg SVT-410HLN. Now I am using the B2R as a preamp (until I get another one) and using one side of the QSC to power the 410 cab. Here are my questions. On the QSC where do you guys have your gain knobs at? Are they on full and then you adjust the master volume to taste? Or is there a happy medium between the preamp and the power amp? I went through the rehearsal and noticed clipping here and there on the especially hard played parts. I had the QSC gain almost all the way up and the B2R master volume around 10-11 o'clock or about 4 (on a 1-10). The cab sounded good but I want to make sure I am not going to damage anything with the clipping here and there. Will this change when I get my preamp? Im looking into an Ampeg SVP-Pro or BBE BMax. As far as my wiring goes I am using instrument cable from the preamp to the power amp and a Speakon from the power amp to the cab.