The most important is to pay attention to: AC current, vibrations, reverberation, and good connections. Bybee iQSE and QSE are my last major improvement in my system, are also in relation with current.
Respond to "notesaddict": The rocks do not have really a purpose it is just décorativ. Second the mirror image behind the speaker are the front grill speakers .
Beautiful. Thank you. Two questions: what is the purpose of the seemingly white rock on top of the power amp and the black mirror image of the speakers standing behind them?