Hsu Research ULS-15

For Sale - Hsu Research ULS-15 Subwoofer.

600 Watts continuous, 2000W peak.

I am moving to a smaller place, and unfortunately this isn't coming with
me. I am sad to see it go, it's a beautiful sounding sub.

This speaker is in great condition. It looks almost new. I am the original
owner, and it has just sat in one location since I purchased it. There
are a few light scuffs that are very hard to see... I tried to take a
picture of one and it wouldn't show. There is a small ding on the back
corner... you can see it in the last photo. It's pretty small,
and you can't see it from the front. Other than that, it looks great.

I know that I don't have much of an Audiogon rating, I don't sell audio gear often, and I usually use eBay. I have a 100% rating there, and I can give you my user name if you'd like to verify.

From the manufacturer website:

HSU Research is proud to introduce the ULS-15, an ultra low
distortion subwoofer that extends down to 10 Hz in most rooms. Besides
outstanding performance, it is the most spouse friendly sub we've ever
offered, with wireless connection, beautiful finish, and compact size.

It is the first high end subwoofer with wireless connection.
This makes it so much easier to optimally place the subwoofer without
ugly wires or the high cost of running in-wall wires to the optimal
location.

For the truly high end folks, you can also run balanced
signal to the subwoofer. The ultra low distortion, super deep bass
extension, and balanced inputs make it ideally suitable for recording
studios.

The ULS-15 features a woofer with patented super linear
motor. The motor force is linear within 2% over an ultra wide +/- 20 mm.
In contrast, most woofers with Xmax of +/- 30 mm will have the motor
force within 2% over 5 mm or less. It also has a butyl rubber foam
surround. Butyl rubber foam has the longevity of solid butyl rubber
without the weight penalty. Triple shorting rings mean virtually
non-existent flux modulation distortion.