Thanks, Tom. That's also what I thought, but wanted to get a second opinion. The reason I'm curious is because I'm looking at a Kenwood 66-watt unit with MP3 capability and a USB port. It's $129 from Crutchfield, so it's not like I need to take out a 2nd mortgage. Nevertheless, I'm wondering how substantial the difference in sound will be. I installed Polk Audio db571's a few years back and they were marginally better than the stock speakers.