The Hsu Research VTF-1 has proven to be a solid performer that, relative to its price point, does most everything well with very little wrong. I found it to be both musical and responsive to the source material I threw at it while still capable of very respectable output levels. Sonically, the VTF-1 is similar to the STF-1, retaining the best qualities while making sonic improvements with key differences consisting of the larger driver, an increase in amplifier power, and the ability to play lower. The end result is that the VTF-1 sounds like a heftier sub, sonically, than the STF-1 with a similar price to performance ratio. If you are in the market for a high value subwoofer then Hsu should be on the list of products to investigate; the VTF-1 is a good sub that is hard to beat at the price.
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