I play a Markbass SD1200 into a homemade 15/6. I've had both for about 6 years. I play in a loud classic rock cover band. I've never run out of volume with my setup. I went with the SD1200 because it sounded fantastic and I liked the sweepable low mids. One of the other reasons I went with it was because I kept reading about how fEarfuls "need" that much power. I tried the Shuttle 9.0 ([email protected]) and it was clipping at my band's volume. Recently, I tried the Streamliner 900 and it too clipped at volume. We aren't stupid loud, but we do rehearse in a concrete basement with a metric butt-ton of junk in it. I felt like those amps just didn't have the right "push" to them. I don't know how to really describe it. I plugged the SD back in and problem solved. I ask because I'm curious about the Quilter Bass Block 800, which is [email protected] I'm also playing with a not-as-loud band now. Am I going to run into the same problem with not having "enough" watts to run some volume with that cabinet. What does "enough" watts mean with this cab anyway? I am pretty green with sound engineering, but I'd be curious to know some science behind it. I'm a toolmaker, so I have math and technical know-how. Thanks in advance.