The LM-845 Premium is a SET integrated amp that uses massive output transformers and a massive separate power supply. The driver tubes are 300B and output tubes are 845. I've upgraded the tubes to Western Electric. The authority, richness and soundstage this amp provides is outstanding. With the Aerial 20T V2 speakers it presents a huge soundstage that is silky smooth and powerful.
The Black Box is a Low Frequency Resonator Array that works in conjunction with the Atmospheres and FEQ X4 to solve bass node issues.
sbayne, having the Rythmik F8's is very cool, as is using them as bases for the Tektons. May I make a suggestion? Go onto You Tube and watch all the Tech Talk Tuesday videos that Danny Richie of GR Research (Rythmik Brian Ding's collaborator) has made. Find the episodes in which Danny discusses the problems caused by employing multiple tweeters on the same baffle. With two Tekton's stacked, you are creating some serious phasing, lobing, and comb filtering issues. The huge distances between the various tweeters is unquestionably creating some out-of phase cancellation at certain frequencies.
But, if you like the resulting sound, that's in the end all that matters.