Yes, I suppose. Obviously, an amplifier from a portable radio or an IPOD woudn't suffice to drive a good sounding stereo system. I understand that boom boxes aren't going to sound as good as a decent home stereo. But for the most part it is true, if we're talking about hi fi components made for the purpose. The difference between the sound quality of the amplification in my $199 receiver and my former $5500 tube amp is trivial, as an example. The difference between my old HK CD player and a former $3500 one is zero. No difference in sound at all. The $3500 was built better but the HK is still going strong after 10 years so it is apparently built well enough. Hopefully, you get my meaning. With that addition, I'll stand by my statement.