Interesting DIY audio website

[ThomasW]

http://www.users.bigpond.com/bcolliso/flare-testing.htm

His flare testing jig....

[ThomasW]

Another link off the website above. This one has a very clever DIY flare using heated standard PVC pipe

http://www.users.bigpond.com/bcolliso/flares-25mm.htm

[ThomasW]

Well the more I surf this fellows site the more interesting things I find. So here's a site map.

http://www.users.bigpond.com/bcolliso/sitemap.htm

Among other things he has a little freeware program for calculating subwoofer box sizes.

Boxnotes

[GrahamT]

Wow, cool site. That PVC port flare trick is quite clever, but I dont know if is worth the effort for a 25mm radius flare. It is probably easier to make one using a 1" roundover router bit (if you already have one) and MDF rings.

[ThomasW]

It's probably not worth messing with heated PVC for little ports where it's easy to use a router bit. But for larger sizes it has promise.

[Bent]

What would be used for uniform heating?
I have a commercial 1800 watt PVC pipe bender for conduit up to 2-1/2", but 4 inch or larger would require some ingenuity.

[ThomasW]

I was wondering about that too.

For a big pipe I'd start with by holding the end in boiling H2O. Use boiling oil if you anticipate an attack by the Mongol hoards later in the day.... :B

Then use a heat gun or better yet one of those infrared parabolic area heaters. They're like $50 at Costco

[PMazz]

Maybe I'll try one after the turkeys come out of the fryer...

Pete