Sorry did I say IV, should have been VI which is the 600w version.
The speakers were not breaking up but when you get use to a cab you know what its capable of and how to push it, and that particular Warwick is a monster.
All the amps I've used with it worked well so Tube or SS is not really an issue.
[quote name='therealting' post='36600' date='Jul 24 2007, 10:28 PM']Sorry to take your thread on such a detour, but this is really useful information to me. I have only used the 2x12" twice now:[list]
[*]the first time was with a Laney 165w head at the rehearsal space we were using. The amp was terrible, but the 2x12" actually filled the room better than the stack of cabs they had in the room (a 4x10" and a 1x15"). I was astounded by the efficiency.
[*]the second time was at a showcase on Monday. I used a Behringer ADI-21 preamp pedal into a t.amp TA1040, which I'm guessing puts out 525w per channel into 4 ohms... however the ADI had a very weak output (despite actually sounding pretty good), so it was hard to assess how much power was going into the cab. I ran one channel at full volume, with the ADI also at full volume. It sounded glorious.
[/list]The Quad IV is rated at 400w though, isn't it... was the cab farting out, or were you getting cone over-excursion or something?
Do you feel it works better with a head with a tube preamp or a solid-state preamp?[/quote]