J.L.> audio classics is great, you don't need to check ahead they will have several amps hooked up that you can listen to through several speakers. They might all be really expensive but they will let you listen. Last time i was there i listened to the pf- 39 palladiums through mac ss and tube gear along with mac and b/w speakers for about an hour by myself! They also used to have a cut a way klipschorn so you could see how it works. it's worth the trip!