I remember those, TC9 based IIRC, heard a pair of the 12s in late 1999 in the trunk of a friend's Corolla, quite the beast. Retail on them back then was $400 or $500 each, locally //content.invisioncic.com/y282845/emoticons/eek.gif.771b7a90cf45cabdc554ff1121c21c4a.gif
Meh, I wouldn't call the G4 HCCA amplifiers "old school". I have a HCCA 250 G4 that I am waiting on someone to pay for as I type this. I already gave my HCCA 225 G5 to the same person and will probably just send him the HCCA 250 because I am tired of looking at it.
Anything past the Digital Reference line gets no love from me.