i would have loved to have heard the yamaha with my rx6's, id say they would have sounded great..fwiw ive had a 50watt nad c326bee, a 45watt marantz pm6003 and a 95watt marantz pm7000 paired with rx6's, and the older, more powerful pm7000 sounded best to me.. im not saying the rx6's need power, but i found they sounded best with the more powerful pm7000.. the as-500 is the most powerful amp in its class..