We used to haunt a high end stereo shop when I was 17... we all had decent mid range stereos and liked to dream. I remember a 500 watt per channel McIntosh amplifier driving some Magnaplanar speakers that sounded awesome... off the charts clean sound. Think THD on the amplifier was below .003% and it was running class A. Came with a serious price tag too! $10k amplifier in 1977!!!