I recorded this VHT Special 12/20 Review tonight after waiting for months to hear someone else do the work so I could eat the fruit! The speaker in this amp needs a lot of breaking in, you can hear it’s a little harsh after 10 hours of play time. Still, I can clearly hear now that with a set of JJ’s from Eurotubes.com (Because Bob Pletka kicks ass!) this amp is going to be freaking killer daddy “O”! It very much thrives in a closed back cabinet like a big smoothly.