Subwoofer for Vienna Acoustics Mozart Grand

I have to think that most any of the Velodyne DD or Optimus Series would serve you well. Velodyne makes nothing but subwoofers and I think they do it better than any other company.

The DD (Digital Drive) and Optimus subs make use of some very sophisticated room correction software and a calibrated microphone to "listen" to the sub's interaction with the room and your other speakers and then adjusts itself accordingly to virtually eliminate the peaks and nulls caused by standing waves and such.

Read up on these subs and their DSP (digital signal processing) capabilities and I think that you will be very impressed by what Velodyne has achieved....

Best Wishes,

-RW-

REL has often been recommended with Viennas as well as Sonus Fabers. Maybe because of the Sumiko connection over the years but regardless, I believe there are many satisfied owners using this combination.
I use a REL T1 with my VA Bach Grands and couldn't be happier. The T1 is a fast, musical sub that syncs with my Bach Grands very well.

You need to do some research. I suggest beginning with the DSpeaker processor which has the ability to make almost any sub work with your room and speakers.

In an in home comparison REL were a worst performer. Compared to the other subwoofers their connectivity and setup instructions were simply silly when I tried their Studio III.

I disagree one of the most musical subwoofers I have heard was a REL, the one I heard was very well setup though. I also like the Rhythmik/GR research servo 12. Most of the challenge with a subwoofer though is going to be integration, so I definetly recommend something like the mini DSP or Behringer 2496. Most of the bad subs I have heard in my life have been very poorly setup or way too hot.

The Velodyne is very good as well, most of its strength though comes from its auto setup mic, most smaller audiophile companies can't afford to develop something like that. I heard a huge Velodyne DD sub sound very good in a tiny room.