I've had my AC15 for a month now and one thing I really started noticing is that when I crank it (MV dimed, volume around 2 or 3 o'clock) it sounds like I have a compressor pedal on. It *feels* like there is also the slightest amount of delay between my pick attack and the sound coming out of the amp. I'm normally plugged directly into the amp. I just let the amp overdrive on its own and I use the onboard reverb (sometimes the tremolo, but rarely). What's also interesting is that after about 1 o'clock, the volume doesn't get too much louder, but the amp just starts to saturate a little more. It sounds pretty cool. It definitely doesn't break up like my DR did, but I wonder if the 75-watt Warehouse speaker has a lot to do with that. From what I understand, most tube amps have this sag or squish? It was less noticeable in my '68 DRRI. Maybe this a dumb question since I'm assuming this all happens inside the amp, but would any boost pedals or anything reduce the sag? I can live with it if it's a "feature not a bug" sort of thing. Just wondering if there's a way to reduce it. Thanks.