Choice of preamp for me seems to have the biggest impact on soundstage for me. Also, I note that a few folks have discounted the effects of interconnects on soundstage - I'd have to disagree. I had KCAG, HT Truthlink, Cardas Golden Cross and HGA Silver Lace. I found that these cables offered negligible difference in sound quality. However, I then switched to Nordost SPM (far more expensive than the other cables I tried) and the soundstage opened up dramatically. I couldn't believe it. For some reason the law of deminishing returns got turned on its head in my experinece - I had to spend a lot and then I got a great return. Anyway, just my experience. System is Audio Physic Virgo II, Blue Circle BC2 monos, Sonic Frontiers Line 3, YBA CD1a, Nordost SPM ICs, FIM GOLD Speaker Cable.