I have monitor audio gold gs10 and gs-lcr, driven by an old yammy rxv730 receiver. At first i thought i would need a bigger amp for the golds, since they are the flagship product from that british manufacturer. I mean, most high end speakers are either 4 or 6 ohm ( impedance ). Well, if 8 ohm speakers sound this good ( i love the speakers to death ), what is the point of creating 4 ohm speakers? Why make it hard to drive? Is there any advantage in making it hard to drive? About the golds...well, i think i already played them for about 100 hours ( i started to use them about 2-3 months ago ). And they are definetely bright... the treble knob is pointed to 8 o'clock to prevent my ears to bleed when listening them real loud. But i like the way they sound. Crisp, clear, smooth, and full.