I got the speakers I have now, which blew me away in the store. I took them home, purchased a new Adcom amp and pre to go with them, and it was absolutely the worst sound I have ever experienced (great detail, but so harsh certain types of music were unlistenable)--took them back, found I couldn't live without them, went back and re-bought them, figuring I'd find a way to tweak or live with the sound--after a couple of years, I bought a cheap tube amp on a whim. Those speakers went from the the worst to fantastic and I haven't touched that system in more than 25 years. I have no doubt that the tube amp 'degrades' the signal; but whatever it does, my ears are grateful.