I have a Shuttle 3.0, and was playing it tonight having a good ol' time - running it through my 4 ohm SWR 8x8 cab (rated at 400+ watts), and the clip indicator light started coming on (in the power amp section, not the input gain clip light). I was playing a few different basses, but even with my passive bass, and with the input clip light barely coming (usually not lit up), the power section was clipping with my volume right around 12 o'clock. I had the bass knob DOWN one click from center, the parametric mid was set above the middle point (2 o'clock)- doing about a 3db boost on the upper mids, and had the treble up one click. I can't believe I ran out of head room. The volume was decent, but I could have used it louder. I'm pretty sure my GK 400RBIII head rated at only 240 watts has put out more volume through that cab (at that same club) in the past. Why is my 300 watt Shuttle calling it quits? Is it ok for the clip light to blink (not on steady)? Safe? Can I push the amp harder or will that just make the amp clip more and give me no more volume? Should I look in to buying a 500 watt power amp and run my Shuttle as a pre-amp to that for larger/louder gigs? I have an outdoor gig to play on Monday, and I'm concerned. At this point my GK head will get the call. I'll need all the volume I can get for that one - no PA support for the bass (just for vocals)... and the guitars get LOUD!