^ lol, Mr. Schmartypants beat me to it.

The PPI Art amps just had a tube inside the cavities in the heatsink. They weren't even near the outputs IIRC. Really more for marketing purposes than anything but it did look cool!

No comment on the age thing

 

I had a few of those a while ago, not best SPL amps by far.

 

these are so gorgeous !!

 

wow, I'm surprised the Abyss and Tru thing still comes up! Wasn't this a 5yr old topic?

good stuff though... miss the original tru gear.