yes, i've *upgraded*, & heard no improvements. mostly w/interconnects. but, as i have yet to drop really big money on 'em, i really am not too upset about it. regarding component upgrades, as i usually buy used or close-out, no need to lie here, either - yust sell it & move on. at the end of last year, it took me 4 preamps to finally settle on the right one. sold the 1st three for yust about what i paid for 'em...
doug s.