Using fiberglass instead of cotton felt for lining Frugel-Horn? - diyAudio
Go Back   Home > Forums > Commercial Sector > Vendor Forums > Planet 10 hifi

Planet 10 hifi Home of the Frugal-phile™ - Planet 10 HiFi

Reply
 
Thread Tools Search this Thread
Old 21st October 2012, 11:06 AM   #1
hajj is offline hajj  Lebanon
diyAudio Member
 
hajj's Avatar
 
Join Date: Nov 2009
Default Using fiberglass instead of cotton felt for lining Frugel-Horn?

Hi,
I am currently building a DIY (non-flatpack) FH3 and since I have no access to thick cotton felt, was wondering if using some 2cm thick fiberglass would work instead.
Thanks
Nick
  Reply With Quote
Old 21st October 2012, 09:35 PM   #2
frugal-phile(tm)
diyAudio Moderator
 
planet10's Avatar
 
Join Date: Oct 2001
Location: Victoria, BC, NA, Sol III
Blog Entries: 5
It should work, how thick will depend on its density. Youmay needto adjust the polyfluff tomake things work.

A removable panel while you play would be desirable.

dave
__________________
community sites t-linespeakers.org, frugal-horn.com, frugal-phile.com ........ commercial site planet10-HiFi
p10-hifi forum here at diyA
  Reply With Quote
Old 22nd October 2012, 01:24 AM   #3
expert in tautology
diyAudio Member
 
bear's Avatar
 
Join Date: Apr 2002
Location: New York State USA
Carpet underlayment, felt type. It's synthetic fibers mostly, but should be better than fiberglass. Also safer.

_-_-bear
__________________
_-_-bear
http://www.bearlabs.com -- Btw, I don't actually know anything, FYI -- [...2SJ74 Toshiba bogus asian parts - beware! ]
  Reply With Quote
Old 22nd October 2012, 07:22 AM   #4
hajj is offline hajj  Lebanon
diyAudio Member
 
hajj's Avatar
 
Join Date: Nov 2009
The fiberglass I have at hand is the high density type, 50kg/m3 and 100kg/m3.

If I don't find thick carpet underlayment, I'm gonna give the 100kg/m3 a try...

Thanks for the replies.
  Reply With Quote
Old 22nd October 2012, 05:19 PM   #5
expert in tautology
diyAudio Member
 
bear's Avatar
 
Join Date: Apr 2002
Location: New York State USA
wow, are you *in* Lebanon now??

I'd be afraid to go outside, I think...

_-_-bear
__________________
_-_-bear
http://www.bearlabs.com -- Btw, I don't actually know anything, FYI -- [...2SJ74 Toshiba bogus asian parts - beware! ]
  Reply With Quote
Old 22nd October 2012, 05:50 PM   #6
hajj is offline hajj  Lebanon
diyAudio Member
 
hajj's Avatar
 
Join Date: Nov 2009
Quote:
Originally Posted by bear View Post
wow, are you *in* Lebanon now??

I'd be afraid to go outside, I think...

_-_-bear
Yes, I'm in Lebanon
You won't be afraid to go outside, simply because it's not as bad as it looks on TV, proof of that is that I'm more concerned with damping material than I am with what's happening over here
(foreign media do tend to blow things out of proportion)
Plus, 15 years of civil war ends up building a resilient society.
Back to my FH3 build
  Reply With Quote
Old 23rd October 2012, 07:29 PM   #7
chrisb is offline chrisb  Canada
diyAudio Member
 
Join Date: Aug 2002
Location: victoria BC
Quote:
Originally Posted by hajj View Post
Yes, I'm in Lebanon
You won't be afraid to go outside, simply because it's not as bad as it looks on TV, proof of that is that I'm more concerned with damping material than I am with what's happening over here
(foreign media do tend to blow things out of proportion)
Plus, 15 years of civil war ends up building a resilient society.
Back to my FH3 build


Syria on the other hand must be a pretty damned scary place right now - unless the international media has got that all wrong.

back to the FH3 - as Dave mentioned earlier, probably a good idea to construct the enclosures with one removable panel to allow for adjustment / experimentation with fill materials and levels - a couple of builders have come up with brilliant methods of accessing through the top.
__________________
now on sabbatical
  Reply With Quote
Old 24th October 2012, 09:40 AM   #8
hajj is offline hajj  Lebanon
diyAudio Member
 
hajj's Avatar
 
Join Date: Nov 2009
Quote:
Originally Posted by chrisb View Post
Syria on the other hand must be a pretty damned scary place right now - unless the international media has got that all wrong.

back to the FH3 - as Dave mentioned earlier, probably a good idea to construct the enclosures with one removable panel to allow for adjustment / experimentation with fill materials and levels - a couple of builders have come up with brilliant methods of accessing through the top.
Syria is a totally different situation....

I have gone and used the 50kg/m3 fiberglass for now, the stuffing and most of the fiberglass is reachable through the driver opening, and eventhough I was aware of the methods devised to have an access to the stuffing through a removable top panel , my haste and excitement got me to glue up all the panels...
Should make for an "interesting" tuning process to say the least.

I have already done some preliminary listening with the FF125WK mounted in them, and while the results seem promising, tuning the stuffing is definitely needed as the lower frequencies are much exaggerated even with the enclosures pulled more than a meter from the rear wall.
Furthermore, experimentation tends to show that a suprabaffle might help a lot in balancing out some of the higher bass frequencies.

Anyway, I'll be starting a thread on the build and the tuning soon. (as soon as I get the second enclosure glued up and singing.

Regards

Nick
  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
US source for thick acoustic felt (box lining) dainrobert Parts 4 29th March 2011 01:57 AM
UK source for Cotton / Wool felt? underwurlde Full Range 7 23rd September 2009 08:40 AM
Purpose of felt lining in TL ? dublin78 Multi-Way 1 28th February 2008 11:33 AM
stuffing/lining a bass horn paulspencer Subwoofers 5 15th February 2007 07:47 PM


New To Site? Need Help?

All times are GMT. The time now is 09:02 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