Has anyone listened to a pair of these? Ive seen them a few times here and there, but their appearance and slim design always leaves me wondering what they could actually stand up to. Id have to hear them with an 1801 putting the power to them, for long periods of time at high volume... I could make a serious opinion of them then. The add says 800w, if that means each, then possibly 2 1801's, running mono under the same circumstances.