Very clear and smooth. Turned sub off then played m80s and then I rechecked the sub, thought it was still on. Very impressed with the low end. Mids and highs are well balanced. Ive listened to Diana Krall,Acoustic Alchemy,David Sanborn, also the song Yellow Submarine has a fog horn that the m80s had no problem reproducing.I have Adcom 5500 with GFP 5500 preamp and the speakers were DCM 212. Like everybody else, you dont need 30 days you only need 30 min.