Well, I'm doing my best to make up a good SQ system. I've read a lot about how amps can't really affect Sound Quality and I believe it. I am kind of wondering about the 16 volts the Zapco amps can do. I want to get a good amp for my components and I would be willing to save up for a little while longer if the 16 volts makes a good deal of difference over 4v. I also don't really want to spend $500 more on an amp that only makes a marginal difference. Any help would be greatly appreciated.