Hsu ULS-15 Quad Drive Review - Page 2 - Home Theater Forum and Systems - HomeTheaterShack.com

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post #11 of 23 Old 08-10-09, 12:57 PM
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Re: Hsu ULS-15 Quad Drive Review

Sounds like you are having fun getting things set up. I can't imagine wanting/needing to use the Velodyne in addition to the quad drive. Nice to have the choice though.
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post #12 of 23 Old 08-10-09, 06:12 PM Thread Starter
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Re: Hsu ULS-15 Quad Drive Review

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I can't imagine wanting/needing to use the Velodyne in addition to the quad drive.
I really don't need it for output. I hope that I can use it to help smooth out FR across the seats. I got part of the way there over the weekend. I put it on the left wall, about 5 feet from the corner. It helped the null at the left recliner a little. I tried it again in the left rear corner and the 25-26 Hz null came back.

I am still amazed at the sound quality of the Hsus - really outstanding sub for music as well as HT.

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post #13 of 23 Old 08-15-09, 05:26 AM Thread Starter
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Re: Hsu ULS-15 Quad Drive Review

I received a calibrated ECM-8000 mic from Cross Spectrum yesterday, so I am running new FR plots with it down to 5 Hz. Here is the quad drive with BFD bypassed & Audyssey off. Mains are off. As you can see, there is significant output well below 20 Hz with a large room gain peak at 8 Hz. Subs are at the same location as for the earlier plots.
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post #14 of 23 Old 08-15-09, 05:39 AM Thread Starter
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Re: Hsu ULS-15 Quad Drive Review

Blue plot is Audyssey on, but BFD still bypassed. Some level shift, some improvement in smoothness, but general shape of the curve is the same.
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post #15 of 23 Old 08-15-09, 06:20 AM Thread Starter
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Re: Hsu ULS-15 Quad Drive Review

This plot is with BFD engaged with 4 filters optimized. I think I can live with this but still need to smooth out the null above 100.
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post #16 of 23 Old 08-22-09, 08:29 AM Thread Starter
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Re: Hsu ULS-15 Quad Drive Review

New REW plots this morning, this time with the left front K'horn and the quad drive on (Velodyne off). Same measurement tools as before (with calibrated mic). Only the main listening position was measured. BFD engaged with 6 filters. No smoothing on the plots.
Attached Thumbnails
Hsu ULS-15 Quad Drive Review-quad-drive-fr-sub-lf-bfd.jpg  

Hsu ULS-15 Quad Drive Review-quad-drive-lf-waterfall.jpg  

Hsu ULS-15 Quad Drive Review-quad-drive-spectral-sub-fl.jpg  


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post #17 of 23 Old 09-14-09, 10:59 AM
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Re: Hsu ULS-15 Quad Drive Review

The real deal. WOW!
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post #18 of 23 Old 09-14-09, 05:36 PM Thread Starter
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Re: Hsu ULS-15 Quad Drive Review

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The real deal. WOW!
Still smiling every time I turn the system on Funny, now I find myself critiquing how the recording engineer decided to mic kick drums. The definition of the ULS-15s on music is THAT good.

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post #19 of 23 Old 09-14-09, 05:45 PM
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Re: Hsu ULS-15 Quad Drive Review

Great job. You really got those things dialed in.
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post #20 of 23 Old 07-30-10, 11:47 PM
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Re: Hsu ULS-15 Quad Drive Review

Sorry, never mind....

Last edited by AustinJerry; 07-30-10 at 11:56 PM. Reason: Posted a response to a stale thread.
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