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-   -   Using fiberglass instead of cotton felt for lining Frugel-Horn? (http://www.diyaudio.com/forums/planet-10-hifi/221943-using-fiberglass-instead-cotton-felt-lining-frugel-horn.html)

hajj 21st October 2012 10:06 AM

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

planet10 21st October 2012 08:35 PM

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

bear 22nd October 2012 12:24 AM

Carpet underlayment, felt type. It's synthetic fibers mostly, but should be better than fiberglass. Also safer.

_-_-bear

hajj 22nd October 2012 06:22 AM

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.

bear 22nd October 2012 04:19 PM

wow, are you *in* Lebanon now??

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

_-_-bear

hajj 22nd October 2012 04:50 PM

Quote:

Originally Posted by bear (Post 3211116)
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 ;)

chrisb 23rd October 2012 06:29 PM

Quote:

Originally Posted by hajj (Post 3211151)
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.

hajj 24th October 2012 08:40 AM

Quote:

Originally Posted by chrisb (Post 3212781)
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... :o
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


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