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Official HSU ULS-15 Thread - Page 79

post #2341 of 2712
I'm still struggling to make the web site functional on my iPad. For some reason, quotes in replies don't work for me. Otherwise, it's not too bad.
post #2342 of 2712
Quote:
Originally Posted by AustinJerry View Post

I'm still struggling to make the web site functional on my iPad. For some reason, quotes in replies don't work for me. Otherwise, it's not too bad.

Jerry,
I have an iPad2, and can get the quote feature working in Safari. FWIW, I'm running iOS 5.1.1.

Stuart
post #2343 of 2712
Quote:
Originally Posted by sdrucker View Post

Jerry,
I have an iPad2, and can get the quote feature working in Safari. FWIW, I'm running iOS 5.1.1.
Stuart

Hi Stuart. You are correct. When I touch the "Quote" button, the first time it simply opens a little window explaining what the key does. When I touch the button a second time, It works. It takes a bit of getting used to it.
post #2344 of 2712
Been looking into this sub for awhile and thinking I might pick one up. After reading this thread it seems a lot of you have 2, 3 and even 4 of these subs. Is that because this sub can't stand alone and needs multiple subs to sound good?
post #2345 of 2712
Quote:
Originally Posted by gce View Post

Been looking into this sub for awhile and thinking I might pick one up. After reading this thread it seems a lot of you have 2, 3 and even 4 of these subs. Is that because this sub can't stand alone and needs multiple subs to sound good?

I originally had one of these subs and it sounded fabulous..(16'X17' room with a vaulted ceiling). Bought a second one as I wanted to move my system into the relm of "crushing bass" and that it did...
post #2346 of 2712
Quote:
Originally Posted by gce View Post

Been looking into this sub for awhile and thinking I might pick one up. After reading this thread it seems a lot of you have 2, 3 and even 4 of these subs. Is that because this sub can't stand alone and needs multiple subs to sound good?

In my case, I have multiple sub's to smooth out the bass response in my listening room.
post #2347 of 2712
+1
post #2348 of 2712
I can understand the points made so far on multiple subs, but wouldn’t a single ULS15 work superbly in many situations? For example, in my dedicated home theater (about 2400 cubic feet), 90% of the listening and viewing is with me alone in the sweet spot. When others join me, they often praise the sound quality regardless of where they sit. Thus I don’t have a strong need for multiple subs to balance the frequency response throughout the room. As to power, wouldn’t one ULS15 have sufficient “oomff” and clarity? And even if I wanted to exaggerate the low end and get that “crushing base” Keef95 mentions, why not just turn up the level of a single ULS15 (which I assume would have power to spare) rather than putting more subs into the room?
post #2349 of 2712
Quote:
Originally Posted by Hoyt Griffith View Post

I can understand the points made so far on multiple subs, but wouldn’t a single ULS15 work superbly in many situations? For example, in my dedicated home theater (about 2400 cubic feet), 90% of the listening and viewing is with me alone in the sweet spot. When others join me, they often praise the sound quality regardless of where they sit. Thus I don’t have a strong need for multiple subs to balance the frequency response throughout the room. As to power, wouldn’t one ULS15 have sufficient “oomff” and clarity? And even if I wanted to exaggerate the low end and get that “crushing base” Keef95 mentions, why not just turn up the level of a single ULS15 (which I assume would have power to spare) rather than putting more subs into the room?

It would certainly have "oomff" and clarity but the aspect that the two ULS-15s made me appreciate was more "impact"...I'm guessing its more driver area hitting with the speed and force it's capable of from its relaxed position... One would be fine and would make you happy however there was a time I looked at Dual Drive systems and said "who needs all that"...Now I see a picture of a guy's system with Quad Drive and think, "for only a couple grand more..."...smile.gif
post #2350 of 2712
Quote:
Originally Posted by keef95 View Post

It would certainly have "oomff" and clarity but the aspect that the two ULS-15s made me appreciate was more "impact"...I'm guessing its more driver area hitting with the speed and force it's capable of from its relaxed position... One would be fine and would make you happy however there was a time I looked at Dual Drive systems and said "who needs all that"...Now I see a picture of a guy's system with Quad Drive and think, "for only a couple grand more..."...smile.gif

Hoyt, the answer is pretty simple. Start with one sub, and experiment with placement to make sure it is optimized for your room. If you aren't happy with the bass, get a second sub. If there is a budget consideration, keep in mind that many people say that two reasonably-priced subs usually outperform a single expensive sub (due to the fact that two subs provide a smoother response).
post #2351 of 2712
Quote:
Originally Posted by Hoyt Griffith View Post

I can understand the points made so far on multiple subs, but wouldn’t a single ULS15 work superbly in many situations? For example, in my dedicated home theater (about 2400 cubic feet), 90% of the listening and viewing is with me alone in the sweet spot. When others join me, they often praise the sound quality regardless of where they sit. Thus I don’t have a strong need for multiple subs to balance the frequency response throughout the room. As to power, wouldn’t one ULS15 have sufficient “oomff” and clarity? And even if I wanted to exaggerate the low end and get that “crushing base” Keef95 mentions, why not just turn up the level of a single ULS15 (which I assume would have power to spare) rather than putting more subs into the room?

While the ULS-15 is a powerful sub, it is limited what a single 15" in a small sealed enclosure can put out. The 15H has a lot more output simply because it has a much larger enclosure and is ported, both greatly improving the efficiency of the system. It's also a matter of lower distortion and better long term reliability when you have more subs. When you have two, efficiency doubles so each sub needs only 1/4 the power to achieve the same SPL. The ULS is the most musical and definitely the best choice for high end music systems, but are best in multiples for HT.
post #2352 of 2712
Quote:
Originally Posted by AustinJerry View Post

Hoyt, the answer is pretty simple. Start with one sub, and experiment with placement to make sure it is optimized for your room. If you aren't happy with the bass, get a second sub. If there is a budget consideration, keep in mind that many people say that two reasonably-priced subs usually outperform a single expensive sub (due to the fact that two subs provide a smoother response).

And that two can give you up to four times the output of one...
post #2353 of 2712
Quote:
Originally Posted by dr_hsu View Post

While the ULS-15 is a powerful sub, it is limited what a single 15" in a small sealed enclosure can put out. The 15H has a lot more output simply because it has a much larger enclosure and is ported, both greatly improving the efficiency of the system. It's also a matter of lower distortion and better long term reliability when you have more subs. When you have two, efficiency doubles so each sub needs only 1/4 the power to achieve the same SPL. The ULS is the most musical and definitely the best choice for high end music systems, but are best in multiples for HT.

The good Doctor is correct and reminded me of the two reasons I selected the ULS-15 several years ago...I listen to a lot of music and so the sealed sub was the "go to". Also the ULS was (maybe still is) about the only game in town for a wireless solution...

With two I really can watch/listen at some ridiculous volume levels... biggrin.gif
post #2354 of 2712
Dr. Hsu,

I just "discovered" the ULS-15 and love the look and performance. I just had a few questions:

1. Why isn't a Freq. Response plots provided?

2. For my application, I will probably have to use a higher crossover frequency than I typically like...somewhere between 80-120Hz will probably be what is best. Can the 15in. woofer handle these higher frequencies as good as a 12-13" woofer?

3. Are the dimensions perfectly 18" square? Size is critical for my application and I'd hate to be surprised that it is 18.5" or 18.8".
post #2355 of 2712
The cabinet is 18" square but the amplifier heatsink and controls stick out a bit (and you have to allow for interconnects and power cords to stick out as well), not to mention the added depth of the grille (but you can take that off).

Response is flat out to several hundred Hz. Not an issue to crossover higher if you can place the sub up front between the main speakers (crossing over higher will make the sub localizable).
post #2356 of 2712
I have Four ULS-15 subs, recently (The Last Month) during or once a movie has ended, I have one sub that is humming rather loud. If I go up and unplug it and then plug it back in it goes away. Can someone suggest what is going on?
post #2357 of 2712
Sorry to hear that. Does it do this consistently? Any particular movie that causes this? Never heard this issue before. Are all the subs gain matched?
post #2358 of 2712
My first thought is you should check the LFE cable going to that sub. One end or the other has a loose connection.
post #2359 of 2712
Quote:
Originally Posted by dr_hsu View Post

Sorry to hear that. Does it do this consistently? Any particular movie that causes this? Never heard this issue before. Are all the subs gain matched?

Subs are all gain matched, and it happens pretty much once a day. AS I told HTG below, its the powere I am unplugging to reset it
post #2360 of 2712
Quote:
Originally Posted by hometheatergeek View Post

My first thought is you should check the LFE cable going to that sub. One end or the other has a loose connection.

Hi HTG..... will check the cable, although, I am unplugging the power to make it stop not the LFE connection. aorry for not making that clear..... I dont even tough the LFE cable just the powere to the wall
post #2361 of 2712
If you are up to getting some exercise, you can swap that sub with another sub. If the problem follows the sub, then it's the sub. If that is the case, call in to get an RMA# and send the amp back for us to check out.
post #2362 of 2712
Quote:
Originally Posted by dr_hsu View Post

If you are up to getting some exercise, you can swap that sub with another sub. If the problem follows the sub, then it's the sub. If that is the case, call in to get an RMA# and send the amp back for us to check out.

Will Do, will switch tonight. Thanks
post #2363 of 2712
Yes I know what you meant. Sometimes the connector on the LFE cable can loosen over time which then can create a hummiing sound. Once you remove power from the sub the humming stops. Check both ends of the cable or simply replace that cable before trying the good Dr's advice.
post #2364 of 2712
ok will do thanks HTG
post #2365 of 2712
I am going to run through a bunch of elimination type tests before we do anything with the amps... interesting developement last night

Have two subs on each output of my receiver. The issue is with the front right speaker running off Sub output number 1. The front right developed the hum last night on two occassions, unplugging the LFE wire into the right sub and plugging it back in stopped the hum. However on the subsequuent occassionn, unplugging the LEFT sub from the 110 wall and plugging it back in stopped the hum . Strange? unplug the left sub to stop the hum in the right sub?
Edited by pgodden - 8/6/12 at 11:54am
post #2366 of 2712
Bad Y connector perhaps.
post #2367 of 2712
Try grounding your receiver. I had a similar issue and had to run a wire from my receiver to my Panamax power conditioner to get rid of some ground loop noise (even though it wasn't plugged into it). Sounds similar in that the common is the receiver.
post #2368 of 2712
just swapped the Y connector from sub1 with the one from sub out 2, will monitor
post #2369 of 2712
Quote:
Originally Posted by pauleyc View Post

Try grounding your receiver. I had a similar issue and had to run a wire from my receiver to my Panamax power conditioner to get rid of some ground loop noise (even though it wasn't plugged into it). Sounds similar in that the common is the receiver.

I will give this a go too, should there be a ground connection on the receiver? or just ground from any screw on the back?
post #2370 of 2712
Quote:
Originally Posted by pgodden View Post

I will give this a go too, should there be a ground connection on the receiver? or just ground from any screw on the back?

My receiver had two connectors for an antenna and one was supposed to be ground. Worked perfect. But yes, any screw on the main chassis will work also. Doesn't have to be much, I used an 18g speaker wire.
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