Go Back   Home > Forums > Loudspeakers > Subwoofers

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 14th March 2013, 02:05 AM   #1
Rob B is offline Rob B  United States
diyAudio Member
 
Join Date: Dec 2010
Default Dayton classic 18 project

I've built a simple 15ft ported enclosure loaded with a Dayton classic 18. Its made out of 23/32 b/c grade pine plywood, slot port tuned to 30hz. braced pretty minimally, but the box doesn't seem resonant. 15ft is the actual airspace. 100hz 2nd order passive crossover.

Anyways my problem is that around 70hz and up at any good amount of power the driver buzzes, it sounds very metallic as if the frame is resonating. I've never seen or heard anything like this before, Ive had chinsy boxes that resonate and i know what that sounds like and this is totally different. It sounds allot like a heat shield vibrating, (as in a car with a loose or damaged heat shield), very metallic.

Is it possible to have a frame that resonates at this low of a frequency? I know my box could use more bracing but the sound really seems to come directly from the driver.


I'll post pics as soon as i have some.
  Reply With Quote
Old 14th March 2013, 02:16 AM   #2
diyAudio Member
 
Join Date: Jan 2011
Is it the aluminum cone? Or the classic doesn't have an aluminum cone?
  Reply With Quote
Old 14th March 2013, 02:46 AM   #3
Rob B is offline Rob B  United States
diyAudio Member
 
Join Date: Dec 2010
no, the classic is the cheepie. paper cone, rubber surround, steel frame.
  Reply With Quote
Old 14th March 2013, 02:48 AM   #4
diyAudio Member
 
Join Date: Jan 2011
Stamped steel? Still with the gauge they use and the ribs pressed into the legs of the frame, I can't see it being flimsy enough to "ring"
Who knows. Is the spider connected / glued all around?
  Reply With Quote
Old 14th March 2013, 02:53 AM   #5
Rob B is offline Rob B  United States
diyAudio Member
 
Join Date: Dec 2010
Oh yea, i should have deffinitely mentioned that the spider came unglued the first time i hooked it up to my big amp. I glued it back in place with a 2 part epoxy i get from work (I'm a mechanic), I trust this glue.

but it made the same noise before the thing came unglued anyways, maybe something else is loose and ready to come unglued.
  Reply With Quote
Old 14th March 2013, 02:55 AM   #6
diyAudio Member
 
Join Date: Jan 2011
That's deff a mark against the quality of that driver I guess.

I have had no problems like that with my Dayton drivers
  Reply With Quote
Old 14th March 2013, 02:57 AM   #7
Rob B is offline Rob B  United States
diyAudio Member
 
Join Date: Dec 2010
Yea well, its the first dayton product I've purchased... I was a little upset when it went, it sounded like a jack hammer. It seems to play the same after I repaird it though.

what else could create a buzzing in woofer? I'm wondering if maybe the magnet or end plate is loose, maybe something simple like the wire terminals, something must be loose now that i think of it.

I should call dayton and chew someones *** out, see if they can send me a new woofer lol.

Last edited by Rob B; 14th March 2013 at 03:05 AM.
  Reply With Quote
Old 14th March 2013, 03:03 AM   #8
diyAudio Member
 
Richard Ellis's Avatar
 
Join Date: Sep 2006
Location: Mar del Plata, a BIG seasonal getaway city, can see the Ocean from our residence.
If you can get a hold of a sweep generator (Free online) run the sweep, lock onto the F and manipulate the enclosure to isolate the source. I've found enclosures both old & new that will resonate (Buzz) at a variety of frequencies.
Listening to a low frequency sweep is very revealing......run the sweep slowly though.
***just saw you isolated it to the driver, try a sweep anyway***
__________________________________________________ _________Rick.....

Last edited by Richard Ellis; 14th March 2013 at 03:05 AM.
  Reply With Quote
Old 14th March 2013, 03:08 AM   #9
Rob B is offline Rob B  United States
diyAudio Member
 
Join Date: Dec 2010
I have test tones from 0-200hz in 10hz steps, that's how i usually isolate a concern. but this is such an obvious problem, I mean the mechanical noise is louder then the actual output of the woofer at certain frequencies.
  Reply With Quote
Old 14th March 2013, 04:47 AM   #10
NEO Dan is offline NEO Dan  United States
diyAudio Member
 
NEO Dan's Avatar
 
Join Date: Jun 2008
Location: N.E. Ohio
Take the driver out of the box and sweep at ~5 volts, if it is the driver making noise see about getting a replacement. Unfortunately you've modded the driver by repairing it, good luck getting it warrantied.
__________________
Regards,
Dan
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

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

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Dayton HPSA1000s, Classic 18" subwoofers + Cabinets and equip rack 95Honda Swap Meet 0 27th August 2011 04:12 PM
Dayton Classic drivers? Apfelsauce Subwoofers 7 17th April 2011 03:44 AM
Dayton Classic 18" DCS-450 - Tapped Horn? dolinux Subwoofers 15 4th December 2009 04:38 AM
FS: 15-inch Dayton Classic IIs jmikes Swap Meet 0 12th March 2007 01:16 PM
dayton 10" classic woofers for PA... nerd of nerds Multi-Way 13 29th May 2006 02:24 AM


New To Site? Need Help?

All times are GMT. The time now is 08:12 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2