HSU Research Forum (HRF)  

Go Back   HSU Research Forum (HRF) > Hsu Central > Hsu Research - Setup and Placement Recommendations
Become a member Forum Help Members List Calendar Search Today's Posts Mark Forums Read

Reply
 
Thread Tools Rate Thread Display Modes
  #1  
Old July 30th, 2016, 10:44 AM
ToddZ ToddZ is offline
Registered User
 
Member Since: Jul 2016
Posts: 3
ToddZ is on a distinguished road
port noise VTF MK5

Hi there ! first time on the forum and i must say I'm enjoying my VTF 3 MK5 Hsu subwoofer though I'm having a tough time figuring out the right configuration , i have a occasional issue with port noise at program volume and very low frequencies , my guess is the volume could be too high ( at 10 ish right now ) or Dynamic eq on my Marantz is over pumping some frequencies . the port noise is typically a whistling sound.

thank you
Reply With Quote
  #2  
Old August 7th, 2016, 9:51 AM
power999power power999power is offline
Registered User
 
Member Since: Jun 2016
Posts: 5
power999power is on a distinguished road
I have this same problem. Large port open, eq 2, volume on sub set between 9 and 10 o'clock, sub level on receiver at -2db.

I get LOTS of port noise with anything below exactly 21 hz. Which it shouldn't where the port tuning is 18 hz...
Reply With Quote
  #3  
Old August 8th, 2016, 5:14 PM
Kevin_Hsu Kevin_Hsu is offline
Administrator
 
Member Since: Jun 2012
Location: CA, USA
Posts: 246
Kevin_Hsu is on a distinguished road
Hi there,

Please contact our tech support team @ (714) 666-9260. Thanks!
Reply With Quote
  #4  
Old August 9th, 2016, 9:24 PM
power999power power999power is offline
Registered User
 
Member Since: Jun 2016
Posts: 5
power999power is on a distinguished road
Kevin,

I have contacted them and they were not really much help when it came to this subject. I was told after much discussion that the sub should be operating normally, and that if I wanted to send it in to be checked out I would be responsible for shipping both ways, which I will not do. I would pay for one way.

I like the sub for what it is, but I expected more out of it. I cant play the first organ pipe song on the test cd without lots of port noise, unless I turn the volume down so much that the song isn't fun to listen to anymore. I honestly don't think that in max headroom mode I should get any port noise at 20 hz.

I have loved every HSU product I have owned until this one. I have never had such a hard time finding the right placement for one of your subs, it never seams to sound quite right. Plus it has had port noise issues which none of my previous subs from you have had.

Any suggestions on what to do here would be great!
Reply With Quote
  #5  
Old August 10th, 2016, 5:13 PM
Kevin_Hsu Kevin_Hsu is offline
Administrator
 
Member Since: Jun 2012
Location: CA, USA
Posts: 246
Kevin_Hsu is on a distinguished road
Hmmm. Have you tried opening the 3" port instead? Try that out to see if you still hear a whistle. It's a slightly lower tuning. If it does, let me know
Reply With Quote
  #6  
Old August 11th, 2016, 2:18 AM
ToddZ ToddZ is offline
Registered User
 
Member Since: Jul 2016
Posts: 3
ToddZ is on a distinguished road
Quote:
Originally Posted by Kevin_Hsu View Post
Hmmm. Have you tried opening the 3" port instead? Try that out to see if you still hear a whistle. It's a slightly lower tuning. If it does, let me know
Hi Kevin thanks for getting back to me , i have tried many combinations and turning off dynamic EQ helps as well as unplugging both ports and lowering the volume but with the lowest frequencies I'm getting whistling like a birds for lack of a better term. volume is at 10 o'clock output is now set for -5.5db still not completely solved though. i actually haven't tried just having the 3 inch port open , didn't know that was a configuration option that was acceptable.
Reply With Quote
  #7  
Old August 12th, 2016, 11:28 AM
power999power power999power is offline
Registered User
 
Member Since: Jun 2016
Posts: 5
power999power is on a distinguished road
I have now tried just the 3 inch port. It is much better than the 4 inch, but there is still some audible port noise at higher volumes. Part of the problem could be getting enough output in my room and turning it up to high, but it shouldn't considering my room is only 2100 ft^3.

Could there be something wrong with how to ports are seated in the subwoofer?
Reply With Quote
  #8  
Old August 12th, 2016, 5:11 PM
Kevin_Hsu Kevin_Hsu is offline
Administrator
 
Member Since: Jun 2012
Location: CA, USA
Posts: 246
Kevin_Hsu is on a distinguished road
Pretty rare that it would be an issue, but I'll pm you about it.
Reply With Quote
  #9  
Old August 30th, 2016, 6:05 PM
SME SME is offline
Registered User
 
Member Since: Jul 2012
Posts: 257
SME is on a distinguished road
A whistling sound suggests there may be an air leak in the cabinet or the driver mount. This kind of sound is likely to be a lot louder and more offensive than port noise.

A common place for a leak is the interface between the cabinet and woofer or between the cabinet and plate amp. Those are the first places I'd look. Though I'd be sure to contact Hsu Research for guidance before opening up the sub.
Reply With Quote
  #10  
Old September 14th, 2016, 2:05 PM
ToddZ ToddZ is offline
Registered User
 
Member Since: Jul 2016
Posts: 3
ToddZ is on a distinguished road
Quote:
Originally Posted by SME View Post
A whistling sound suggests there may be an air leak in the cabinet or the driver mount. This kind of sound is likely to be a lot louder and more offensive than port noise.

A common place for a leak is the interface between the cabinet and woofer or between the cabinet and plate amp. Those are the first places I'd look. Though I'd be sure to contact Hsu Research for guidance before opening up the sub.
after a couple of months of trouble shooting i'm still getting a whistling sound but only at program volume , with low frequencies and with Dynamic Eq engaged , turning off Dynamic Eq seems to resolve the issue to a certain degree.

I have sat down in front of the sub to isolate the issue , replaying a low frequency clip during star wars , with tape around the port seam and D Eq on , it seems the whistling is coming from the port itself. If i interrupt the flow of air with my hand or just plug it off completely the sound disappears , turning off D Eq also helps.
current settings are volume at 10am , Eq on 2 both ports open Qc .05

any feedback would be helpful
Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes Rate This Thread
Rate This Thread:
 

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump
 


All times are GMT -8. The time now is 6:07 PM.


Powered by vBulletin® Version 3.6.4
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
Forum Rules The Golden Rule: Treat others as you would want to be treated.

Technical Support: The best way to get tech support for serious issues is to call or email us. Questions asked on the forum may not be answered by qualified professionals.

No "Flaming": Spiteful talk and flaming wars will lead to "time-outs" for parties involved.

Shootouts: Shootouts are comparisons between products. We need to know about shootouts before allowing them on the forum, so call us and talk to the director of Sales before posting. Otherwise, your shootout may be removed.

Add to Reputation: Once you are a registered member, you can click this icon to add to the tally of other members' Rep Points. You must vote for seven other people before you can vote for the same person twice.

Report Bad Posts: Once you register, click this icon to let Administrators know if they should review a post. Please be specific as to why action might be needed.

HSU RESEARCH IS NOT RESPONSIBLE FOR COMMENTS MADE BY THIRD PARTY INDIVIDUALS ON THIS FORUM.

Thanks for reading the rules. Have a good time :)

In Association With