The Muse would be a downgrade. NHT's are not serious sub's. No such thing as fast bass, 40 hertz is 40 hertz. That is the speed. If you want accuracy, you already have it,if not go with your ears. Every ear is unique.
THE best subwoofer for 60/40 HT/2CH?
I own the Velodyne F-1800II sub now. I use my gear for about a 65/35 theater to 2 channel ratio. I, as everyone, have the bug for upgrading, and considered the Muse 18 but am not sure of it's capability in HT usage. If you have any experience, thoughts, or impressions of these subs, OR ANY OTHERS, I should consider, and pretty much in any price range, I would gladly appreciate it. Thanks Dan