Velodyne ULD-18 or Audio PHysic Rhea sub....

The Velodyne HGS series have the lowest distortion and flattest frequency response of any subwoofer. With the servo feedback system they react and decay immediately. It is the most accurate subwoofer for music or theater. Whether one likes accurate sound or not is another issue. The Velodyne Servos play the signal they receive more accurately than any other subwoofer. You certainly should audition the various HGS models and decide for yourself. In regard to the older ULD-18, the new HGS-18 has more output, deeper extension and less distortion. It is my reference.
Take Care,
Curt

Mike,
I've been in Audio over fifty years and have owned or listened to just about every sub out there. I've heard all the Rel's and yes the Talon and the Aerial. I wish you'd try to design a servo feedback speaker and see the difficulties involved. Very few of the top audio engineers have been successful. That's why many subwoofer designers use Velodyne as their reference in designing their own product. We can all chose what we like or don't like but facts are facts. I suggested Mythtrip audition for himself and then decide. I stand by that.
BTW I stated the Velodyne HGS series (not any Velodyne) had the lowest distortion and that's a fact.
Regards,
Curt