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I think my HSU VTF-15H just bit the dust :-( - Page 2

post #31 of 63
Quote:
Originally Posted by jbrown15 View Post

I realize that, the gain knob on my PSA XS30 is way more sensitive compare to the Polk sub it replaced. But having it turned up that high still seems weird that it would blow the driver. I highly doubt HSU drivers are that fragile.

If he played FOTP at reference with the gain high I wouldn't be suprised:eek:

I'm sure Hsu will help you biggrin.gif

Gear mentioned in this thread:

post #32 of 63
I had a 6K cu sq ft room and, using Audyssey MultiEQ, I had to have my gain at 9pm on the VTF-15H. Anything over that, and I was driving the sub too hard.

The VTF-15H is a sensitive sub.
post #33 of 63
Quote:
Originally Posted by oztech View Post

when you set the gain on the sub at half or more
there can be little to no headroom left therefore the amp will clip (run DC which is bad) shortening the life of both the amp ,crossover and voice coil.
That's a myth. There is no DC, and clipped signals have no more a detrimental effect on a sub than does water on a duck's back. But it is possible for just about any amp to put out far more than its rated power, as power is rated at very low distortion levels, not high distortion levels. Over-driving any amp can lead to both thermal and mechanical driver failure.
post #34 of 63
Quote:
Originally Posted by chevychad View Post

I am definitely going to give them their chance to make things right.

The "right" thing would be for you to eat the cost yourself. You bought $2000 worth of subs, and instead of learning how to configure them properly by looking at HSU's guides, you just abused them like a ten-year-old with a new toy. HSU's warranty specifically says that it does not cover "damage caused by abuse, accident, misuse, negligence, or improper operation."
post #35 of 63
Quote:
Originally Posted by cel4145 View Post

The "right" thing would be for you to eat the cost yourself. You bought $2000 worth of subs, and instead of learning how to configure them properly by looking at HSU's guides, you just abused them like a ten-year-old with a new toy. HSU's warranty specifically says that it does not cover "damage caused by abuse, accident, misuse, negligence, or improper operation."

I would definitely try to get the broken sub fixed under warranty. There was way too much money put out not to. On the other hand, you are right on the abuse end of things.

What gets me is that he knew to come her to ask for help after something went wrong but didn't read up on how to set them up when he got them. It would have taken all of 10 mins.
Edited by Prime316 - 2/23/13 at 7:25pm
post #36 of 63
Quote:
Originally Posted by Prime316 View Post

I would definitely try to get the broken sub fixed under warranty. There was way too much money put out not to. On the other hand, you are right on the abuse end of things.

What gets me is that he knew to come her to ask for help after something went wrong but didn't read up on how to set them up when he got them. It would have taken all of 10 mins.

Yeah. I would agree about asking HSU, but someone needs a little more humility here than HSU needs to "make things right." Doesn't sound like HSU made it wrong to begin with. LOL
post #37 of 63
Sorry to hear about your sub. Hopefully Hsu will help ya out even thout it does seem very possible you blew a driver by running with too high a gain on the sub.....but how was the bass before it blew? smile.gif
post #38 of 63
Quote:
Originally Posted by Bill Fitzmaurice View Post

That's a myth. There is no DC, and clipped signals have no more a detrimental effect on a sub than does water on a duck's back. But it is possible for just about any amp to put out far more than its rated power, as power is rated at very low distortion levels, not high distortion levels. Over-driving any amp can lead to both thermal and mechanical driver failure.

http://www.zedaudiocorp.com/Technical/Amplifier-Clipping.pdf
post #39 of 63
Quote:
Originally Posted by cel4145 View Post

Yeah. I would agree about asking HSU, but someone needs a little more humility here than HSU needs to "make things right." Doesn't sound like HSU made it wrong to begin with. LOL


Yeah, there should be no sense that the manufacturer 'has' to do anything here but going above and beyond what you 'have' to do is what separates companies. Most companies only have customer service to sell these days because others have products just as good as yours.
post #40 of 63
Svs svs
post #41 of 63
Quote:
Originally Posted by gregger72 View Post

Svs svs

You saying SVS is the only company that would help someone out who blows up the subwoofer through incorrect use? Or that they've done that for you? smile.gif
post #42 of 63
Quote:
Originally Posted by gregger72 View Post

Svs svs

Just because you were unhappy with your experience with them rolleyes.gif I remember lol
post #43 of 63
Quote:
Originally Posted by pokekevin View Post

If he played FOTP at reference with the gain high I wouldn't be suprised:eek:

I'm sure Hsu will help you biggrin.gif

I believe he said he was watching the movie at -10, not reference.
post #44 of 63
Quote:
Originally Posted by gregger72 View Post

Svs svs
^^ fanboi that doesn't understand that this can happen with any sub...

OP as mentioned the amps in the 15H are very sensitive and when properly calibrated the gain on your duels should be around the 8:00-9:00 position. After that feel free to turn the sub volume on the reciever up if you wish. I run duel 15Hs and have never heard them struggle at reference levels.
post #45 of 63
Quote:
Originally Posted by jbrown15 View Post

I believe he said he was watching the movie at -10, not reference.

Ahh my bad. Either way definitely wouldn't have adjusted the gain the way he did! Especially on U-571! (I learn my lesson the hard way when I first get my "real" sub)
Edited by pokekevin - 2/23/13 at 11:01pm
post #46 of 63
Quote:
Originally Posted by pokekevin View Post

Ahh my bad. Either way definitely wouldn't have adjusted the gain the way he did! Especially on U-571!
Ehh **** happens, but I'm sure Hsu will take care of him. They aren't one of the top vendors on this forum for no reason. One time I reached behind my Outlaw Plus to plug something in and accidently turned the gain up with my hand not knowing and watched one of the Harry Potter movies and heard one of the worst sounds ever come out of that thing. Luckily I had the remote in my hand to stop the movie and nothing happened to the sub.
post #47 of 63
So? If there weren't believers in myths they wouldn't exist. Roughly half of what's in that link is reasonably accurate, the rest is not.
This was the original source of the clipping kills drivers myth:
http://www.jblpro.com/pub/technote/lowpower.pdf

Unfortunately the key phrase 'high frequency components' did not make it's way into all of the subsequent re-tellings of the tale. Subwoofers, and woofers as well, are not high frequency components.

For a definitive explanation from an impeccable source:
http://forum.qscaudio.com/forum/viewtopic.php?f=29&t=2736
Edited by Bill Fitzmaurice - 2/24/13 at 6:09am
post #48 of 63
You should of waited until monday before you came here and posted.
post #49 of 63
Quote:
Originally Posted by chevychad View Post

The room is about 4500 cu ft.. And I wanted to feel the bass. I should be able to turn it all the way up if I want to shouldnt I? If not, why would the volume even go that high?

As another point of reference. I have a pair of 15Hs in a 4500^3 room. My sub trim on my AVR is -1db with my sub gains between the first and second tick on the dials.
The dials are very sensitive so that means they are barely on.. My subs are level matched btw.
Reading your post it seems that you don't have a good understanding of subs and gain. If I understand you correctly, you set your gain to about 3/4 on top of what you had your AVR volume.That might explain your issue.
Since you asked, what I think is that you abused it. I guess you never read the manual on sub setup?
Wait and see what Dr Hsu says.
post #50 of 63
Thread Starter 
Well thank you all for the replies. Apparently, my subs are set outside the parameters of what everyone else sets theirs at. Perhaps I am stupid for thinking that the volume dial on the subs would increase their output. And perhaps I am ignorant for assuming the max the dial will go is within the operating limits of what the subs were built to handle. I am definitely going to dial them back in the future.

I did actually get a reply from HSU today. Top notch company for replying to my email outside of normal business hours and for trying to work with me on resolving the issue. The email stated that they thought my woofer sounded damaged and instructed me to take it out and hook it directly to a speaker wire from the amp to see if the noise persisted, and if so, they woul issue an RMA for me to return it. I was indeed happy to see this reply from them.

However, after doing as instructed, the woofer does not make the noise when directly hooked up the the receiver. I am assuming my receiver just doesnt have the power the sub does to push it that far. I am awaiting the next trouble shooting step from them now. Ill keep the thread updated..
post #51 of 63
Quote:
Originally Posted by chevychad View Post

Well thank you all for the replies. Apparently, my subs are set outside the parameters of what everyone else sets theirs at. Perhaps I am stupid for thinking that the volume dial on the subs would increase their output. And perhaps I am ignorant for assuming the max the dial will go is within the operating limits of what the subs were built to handle. I am definitely going to dial them back in the future.


Just a note for the future. That's not a Volume dial.

Good luck in getting your sub fixed.
post #52 of 63
Quote:
Originally Posted by chevychad View Post

Well thank you all for the replies. Apparently, my subs are set outside the parameters of what everyone else sets theirs at. Perhaps I am stupid for thinking that the volume dial on the subs would increase their output. And perhaps I am ignorant for assuming the max the dial will go is within the operating limits of what the subs were built to handle. I am definitely going to dial them back in the future.

I did actually get a reply from HSU today. Top notch company for replying to my email outside of normal business hours and for trying to work with me on resolving the issue. The email stated that they thought my woofer sounded damaged and instructed me to take it out and hook it directly to a speaker wire from the amp to see if the noise persisted, and if so, they woul issue an RMA for me to return it. I was indeed happy to see this reply from them.

However, after doing as instructed, the woofer does not make the noise when directly hooked up the the receiver. I am assuming my receiver just doesnt have the power the sub does to push it that far. I am awaiting the next trouble shooting step from them now. Ill keep the thread updated..

My advice would be to read the owners manual for the 15H, and follow their setup recommendations. I would focus on getting optimum placement (you could be sitting in a null) and getting everything configured properly with your receiver. Does your receiver have Audyssey?

The manual addresses most of the common issues and mistakes and also talks about placement. Great place to start.
post #53 of 63
Quote:
Originally Posted by chevychad View Post

Well thank you all for the replies. Apparently, my subs are set outside the parameters of what everyone else sets theirs at. Perhaps I am stupid for thinking that the volume dial on the subs would increase their output. And perhaps I am ignorant for assuming the max the dial will go is within the operating limits of what the subs were built to handle. I am definitely going to dial them back in the future.

.

It's not a volume dial as others have said. It's a gain adjustment to match your avr's line level output to your sub's amp to work in conjunction with the volume dial adjustment on your avr (try this thread http://www.avsforum.com/t/1218982/volume-control-knob-is-an-attenuator-circuit).
post #54 of 63
Thread Starter 
I really think something is loose inside the box. Curiosity ggot the best of me, and I hooked up the sub again, but kept the woofer out of the box and played the scene again. (Although this time, with the knob labeled as "volume" at at the 9:00 position.) There was no buzzing or rattling noises. Once I screwed the woofer back into the box, the buzzing/ vibration noises come back. I checked the back panel to make sure all the screws were tight that were holding the amp in. There were a few that were not as snug as the rest, so I tightened them a bit, but the buzzing is still there, however its not as bad as before. Perhaps because its not as bad because the gain is not as high, but it still rattles more than the other sub. And I dont think its position. I have swapped the position of the woofers, and the buzzing noise follows the same sub..
post #55 of 63
Quote:
Originally Posted by chevychad View Post

I really think something is loose inside the box. Curiosity ggot the best of me, and I hooked up the sub again, but kept the woofer out of the box and played the scene again. (Although this time, with the knob labeled as "volume" at at the 9:00 position.) There was no buzzing or rattling noises. Once I screwed the woofer back into the box, the buzzing/ vibration noises come back. I checked the back panel to make sure all the screws were tight that were holding the amp in. There were a few that were not as snug as the rest, so I tightened them a bit, but the buzzing is still there, however its not as bad as before. Perhaps because its not as bad because the gain is not as high, but it still rattles more than the other sub. And I dont think its position. I have swapped the position of the woofers, and the buzzing noise follows the same sub..

Contact HSU with that information. They'll definitely be able to tell you how to localize the problem from there.
post #56 of 63
Quote:
Originally Posted by chevychad View Post

I really think something is loose inside the box. Curiosity ggot the best of me, and I hooked up the sub again, but kept the woofer out of the box and played the scene again. (Although this time, with the knob labeled as "volume" at at the 9:00 position.) There was no buzzing or rattling noises. Once I screwed the woofer back into the box, the buzzing/ vibration noises come back. I checked the back panel to make sure all the screws were tight that were holding the amp in. There were a few that were not as snug as the rest, so I tightened them a bit, but the buzzing is still there, however its not as bad as before. Perhaps because its not as bad because the gain is not as high, but it still rattles more than the other sub. And I dont think its position. I have swapped the position of the woofers, and the buzzing noise follows the same sub..

Have you checked the feet? If you put pressure on the top of the sub with your hand does the rattling stop?
post #57 of 63
You might try listening close to the ports. Maybe one of the ports has come loose.
post #58 of 63
Thread Starter 
Quote:
Originally Posted by cel4145 View Post

Contact HSU with that information. They'll definitely be able to tell you how to localize the problem from there.

I have. Instructions now are to swap the woofers between the subs and see if the noise follows the woofer. If not, I am going to swap the amps and see if the noise follows the amp. If at that point, the noise is still in the cabinet, it must be the cabinet. I did not get a chance to do that last night, but I am going to do this tonight as soon as I get home from work.
Quote:
Originally Posted by ack_bk View Post

Have you checked the feet? If you put pressure on the top of the sub with your hand does the rattling stop?

The feet are not installed. I have the subs sitting directly on Auralex GRAMMA isolators. I have tried putting pressure on the top, back, and sides, but it does not help the buzzing.
Quote:
Originally Posted by shadyJ View Post

You might try listening close to the ports. Maybe one of the ports has come loose.

I'll try, but not really sure this is a possibility. I guess if I swap all the components and the noise stays with the cabinet, then I'll have to look deeper into that possibility.
post #59 of 63
Thread Starter 
So, the buzzing sound did follow the woofer, which is what HSU suspected it was. They definitely are taking care of me. They issued an RMA # and are going to send me a new woofer as soon as I send this one back to them. Top notch customer service! Seriously some of the best I have ever encountered. Thanks HSU!
post #60 of 63
Quote:
Originally Posted by chevychad View Post

Top notch customer service! Seriously some of the best I have ever encountered. Thanks HSU!
Yes it is. They firmly stand behind their products.
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