Okay, I've had no responses in this forum. Had response in another forum which recommended the unit. The price was excellent and my dealer recommended the unit so I bought. My first impression is very positive. I had to upgrade my first sub as it strained and couldn't keep up with the rest of the system. I haven't had much opportunity to put the system to the test but my initial reaction is that the sub disappears in the system and handles the bass load with ease. It seems fast enough to keep up with the speakers and really punches in when needed. The volume on the thing is barely turned up and so is plenty of headroom.