Finally got some time the the '66 last night.
Before I get too far into it, my phone still won't let me upload a picture for whatever reason, probably skynet or the daleks I don't know. Either way I suck, it's cool, I'll get a pic up eventually.
Now for the important stuff....
The cab is awesome, it really is capable of being stupid loud, and the low end....well I didn't realize what I was missing until I heard it.
I started out practice last night just running my Sunn 1200s straight into the cab. Started flat and took on EQing from there. I got it sounding about right, but I kept getting this awful tearing distortion sound. I tried a bunch of different things but it just kept happening. I thought the worst and that somehow the drivers got messed up in shipping. Unplugged the amp switched back to my NV610 for a song or two.
Then not content that everything was messed up, I bypassed the power amp on my Sunn and used it's preamp to drive my Carvin power amp (DCM3800L). Thanks to the clipping meters on the power amp I was able to set my sunn accordingly, and viola that horrible clipping sound was gone. Turns out I was driving the sunn to that dreaded SS clipping....something I've never done in all my years with it.
So now that I had the preamp setup properly, I finally could give the cab a test to see what it could do. Started with the power amp in stereo just using the A channel into the '66 (1150watts @4ohms) Started at about half power, and just kept notching it up as we played. Before I knew it I had the volume dimed and the cab didn't even seems to care, in fact it was taunting me to stop messing around and throw some real power at it.
Then I switched to bridged mode (3800 watts @ 4ohms). The cab just kept going, the more I turned up the bigger everything sounded. It's hard to explain, I could hear and feel every note but it was all so clear and heavy, even on the higher strings. \
I still need to do a lot more playing with it, especially considering I spent half the night trying to diagnose a problem that was coming from my amp and not the cab. It's outperforming my berg in almost every way. The berg still has this low-mid punch pressure that I haven't gotten the '66 to recreate...yet. I'm sure it's possible to get it, but I only got to tweak for about 30/40 minutes once I finally solved the clipping problem.
This is all too long already, but last thing. My delay has never sounded better. I thought my delay sounded great before, but wow, just wow. It took all the best parts of the 104M but made them clearier and punchier...like even the repeats of my feedback would vibrate things in the room. I don't know how to explain it, I wasn't aware that I wasn't getting the most out of the pedal...but now just so much more detail to everything but not in a sterile way, just a perfect way....