I own both RCA and XLR SE cables, upgrading from previous superbly performing E model. In both instances the improvement is easily noticed. Blacker background, better detail, more holographic. The existing goodness of the Audience cabling and conditioning, only increased. Audience is the only cabling and conditioning that I have used that increases resolution without losing musical and harmonic presence, that decreases noise floor without decreasing dynamics. Nice thing about how they do biz...when they offer an upgrade it is for real.