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SUPPORT FORUMS FOR DECWARE SPEAKER PLANS >> Housewrecker Support Forum >> housewrecker trouble
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Message started by Turtle812 on 05/15/14 at 00:01:24

Title: housewrecker trouble
Post by Turtle812 on 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.

Title: Re: housewrecker trouble
Post by Donnie on 05/15/14 at 00:19:07

Speaker running out of excursion?

Title: Re: housewrecker trouble
Post by Lonely Raven on 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.

Title: Re: housewrecker trouble
Post by dank on 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

Title: Re: housewrecker trouble
Post by DirtDawg on 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.