Welcome, Guest. Please Login or Register
Decware Audio Forums
10/01/14 at 15:46:46


Pages: 1
Send Topic Print
housewrecker trouble (Read 649 times)
Turtle812
Verified Member
**




Posts: 4
housewrecker trouble
05/15/14 at 00:01:24
 
i built a house wrecker and when high output is achieved there is a knocking sound that will disappear if i put my hand in one of the ports.i can find nothing loose yet there is a loud knock when a lot of air moves from the cab. Anyone have any ideas ? more screws,bracing, damping. i am at a loss  thanks in advance.
Back to top
 
 

Music is sculpture of the air FZ
  IP Logged
Donnie
Seasoned Member
****


Why does it hurt
when I pee?

Posts: 666
Re: housewrecker trouble
Reply #1 - 05/15/14 at 00:19:07
 
Speaker running out of excursion?
Back to top
 
 

Owner of the infamous RED TORII
  IP Logged
Lonely Raven
Seasoned Member
****


Jack of all Trades,
Master of None

Posts: 1397
Re: housewrecker trouble
Reply #2 - 05/15/14 at 05:43:42
 
That would be my thought as well. The voice coil is probably bottoming out on the magnet.

When you put your hand over the port, you're tightening up the "air spring" behind the speaker which is helping it keep within its mechanical limits.

If it still sounds good with the port blocked, then you can simply block it off with foam (so it's removable) or a block of wood or something and be happy with your box.
Back to top
 
« Last Edit: 05/15/14 at 05:44:04 by Lonely Raven »  
WWW Lonely Raven   IP Logged
dank
Seasoned Member
****


pair of dual 18
Imperials

Posts: 275
Re: housewrecker trouble
Reply #3 - 05/15/14 at 12:17:30
 
I agree.  I have a speaker like that...sounds great until you get to a certain point.  If you go a little past that point you get a really loud knock... scares the s%$# out of you.  That's a knock that sounds loud over the extreme bass that's playing out of the speaker at the time, so its a REALLY loud knock.


Dan
Back to top
 
 
  IP Logged
DirtDawg
Seasoned Member
****




Posts: 173
Re: housewrecker trouble
Reply #4 - 07/08/14 at 14:08:27
 
I have to agree with these experienced old heads.

Sometimes either the driver is "uncomfortable" in this type of enclosure or you are simply trying to get more out of a driver than it can produce and you reach beyond max excursion.

If your driver still works after a massive bottoming out, bump event, you are lucky.

Try a different driver, reduce any low boost, block off some of the port or in general reduce power.
Back to top
 
 
WWW DirtDawg DirtDawg NO! NO!   IP Logged
Pages: 1
Send Topic Print