I have to say that I am impressed with the Hsu VTF-3!
I was listening to Saint-Saens "Organ" symphony (Munch/Boston Symphony) this afternoon, while playing around with various matrix-surround effects on my new 5.1 system. Then came the famous pianissimo pedal tone in the slow second movement -- the low C with a fundamental at 16.3Hz. I, for the first time, realized that this recording contained such a clean bass. In fact, even before I "heard" it, several of the family photos and posters hung on the wall started to rattle...!
And I repeat, it is really a very very soft, pianissimo pedal tone that did this much damage.
