Soliloquy 6.2 Very Poor Treble .....

BOA2 is correct..your speakers aren't broken in yet. I would hold off judgement till maybe 800 to 1000 hrs.
Also whats the ohm load on those ribbons? Your going to need several different values of resistors to find the correct volume needed between your midrange drivers and the tweeter..not an easy task. You could end up with severe ear bleeds or less highs than you have now.:-)

I'm thinking that listening to a poor sounding pair of speakers for six or seven months is a bad idea....I am trying to improve the sound in the near future.... My amplifiers will need a new set of out-put tubes before these speakers start to sound good....That's if I'm lucky....I would probably be better off to sell these and get something else, but I live in a part of the country where the closest Hi-Fi store is about 350 miles away...It is a little hard to get in my car and drive over for a audition....So what I purchase has to be able to be shipped by UPS etc. Purchased over the phone or inter-net

I strongly Boa's recommendation. Allow the speakers enough time. As a 6.2 owner, I can assure you there will be more treble after 500 hours. Give 'em some volume too.

I dont believe the Aurum is a drop in fit. Its spec sheet shows a 110mm overall diameter. The counter sunk opening in my pair of 6.2's is only 103mm or 4 5/16 inchs.

Distortion....I never could get David on the phone after several calls.....This is one of the reasons I'm losing my fondness for these speakers. I think in a few minutes he could tell me something that may otherwise take forever to learn....But he has no interest in these speakers anymore, so doesn't want to waste any more time with them, I would guess...........