OK, I rarely get the chance to be off stage to hear/see my equipment in action. Last nite I hosted an open mic jam and for a change about 4-5 bassist showed up. I played my Cirrus 6 and my MIM Fender Jazz 4 (stock). These other players had I believe, 69 MIA P-bass, 70's MIA Jazz, all 4 stringers. Had my GBE600 head into my 4x10 SWR Goliath III, 8ohm cab. I'm not a techy so I believe on the preamp side(?)there are FET/TUBE knobs, from left they are gain, gain, volume. I noticed the 2 red clip lites under these knobs flashing as the other guys played and at times staying steady lit for a few seconds as the guy dug in. I was offstage so I noticed this, when I am onstage I am looking down at the amp and you cannot see the clip lites below the knobs. I had all three preamp knobs set at 11 o'clock, the tube button was pushed in, the rest of the knobs across the front were at noon, had the signal shape buttons all pushed in, the last knob on the right, master volume was at about 1 o'clock. So, I know some clip flashing is ok, but when they stay on for more than a blink or so, am I overdriving the pre? Are the older basses compared to my modern basses the cause, they were pushing some air those guys. I dont know if I am clipping that heavily when I play cause again,small stage, I;m righ on top of my rig, cant see the clip lites under the knobs. Should I rethink the knobs settings, ad a second cab to go 4ohms, or is all fine here? I did have the limiter on and the active button off as they used passive basses. The sound was very deep and clean, those older basses have some meat to em. I play with a lite touch and my modern basses did not seem to have the umph of those 60's&70's P & J. I was told my Cirrus sounded good out on the floor, it felt a little thin to me onstage, is that the bloom effect that I miss and the audience gets. So bottom line, is a little more than just a flashing clip lite harmful to my amp or am I OK here. thanks for any info.