Last night I was listening with my Fisher X100B and without the MQ102 - just to make sure everything worked. This morning I checked my midrange polarities (had one backwards, oops), and put the MQ102 between my C32 and MC7300. They sounded great last night, without the MQ102, driven by ~25 watts of Fisher tubes. BUT. With the MQ102 and the MC7300 ... my goodness. The bass is deep, strong, and tight kind of a-la AR3a, but turned up to 11. The mids have fantastic depth. I'm not sure how these dome tweeters compare to the original cones, but they give excellent sparkle without being too forward. (Just a quick note on the cabinet construction - the inner volume is split horizontally. So, each 12" woofer has its entire sealed volume one on top of the other. It's almost like two ML-1Cs stacked horizontally. I mention this because in my ML-2C searching on here, some people think the 12" woofers share cabinet volume - they don't.) I have to say I'm totally, completely impressed and to be honest pretty surprised by how good these sound.