Excerpt: Back when Jimmy Carter was president (or was it Ford?), my first audio system featured a Pioneer SX-434 receiver. Even then, manufacturers had figured out that SX sells. My old receiver was rated at 15 watts per channel and weighed 18 pounds. Today, I'm reviewing a Pioneer VSX-816 A/V receiver (SX still sells) with 110 watts times seven. At 20.3 pounds, it's put on some weight, but what a difference a couple of pounds can make.