I decided to bite the bullet and go for lightweight so I bought a B stock Crown XLS 1500. It was going to replace my QSC GX-3 to save a few pounds. The Crown sounded absolutely awesome when I tried it at a local music store, but when I put it in my rack unit I was quickly disappointed with the amount of output the Crown has compared to the QSC. I haved checked the settings on the Crown and I'm definitely in the correct "Mono/Bridge mode" for a single bass cabinet. Considering the Crown should be pushing 1550 watts in that setting and the QSC is pushing 500 watts in Mono/Bridge, it doesn't have near the volume I was expecting. Has anyone had similar experiences with lightweight power amps? Thanks.