Erik beat me to it. They make a great product and are not priced in the stratosphere. I had an original VTF-2 and it was great. Their Variable Tuning Frequency design gives you more flexibility to tune the sub to your room.
They have as good a return policy as anyone, and Mr. Hsu has been at this a very long time. I would not hesitate to recommend someone give them a try.
They have as good a return policy as anyone, and Mr. Hsu has been at this a very long time. I would not hesitate to recommend someone give them a try.