had a Harman Kardon amplifier 6500 with a very good sound. Attached are B & W CDM 7 SE boxes. After 22 years it was time. For a tube amp I have to save something. As an alternative to this Pioneer had offered. The reviews spoke clearly for themselves. So you have to strike. And it did not regret it. The sound has a fine detail that it has insich. The basses are very stressed and you have to turn slightly backwards. It's amazing what Pioneer has created here. The value for money is unbeatable.