Pioneer 8" build, the Chang variant - Page 2 - diyAudio
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Old 13th August 2007, 11:50 AM   #11
gychang is offline gychang  United States
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Quote:
Originally posted by OzMikeH
I was talking about the sides being 310, I should have said deep not wide.

I'm building a pair too, I'll start in about 2 weeks. The curved front put the WAF through the roof so they beat the Bruce.

It will be interesting to see where the Chang fits in the Frugal family tree. Calhoun's mutant half-brother the heart of a Pioneer and super powers from the gamma rays leaking out from under Ron's hat, able to leap tall wallets in a single bound... Man, I need more sleep.
I followed the dimensions put up by Scott and Dave on the original Chang plan, I used the sides at 310mm deep. Ron's idea of curve appeal is indeed an additional twist.

I am hopeful the Chang makes it into the family tree. Simplicity of the build is very attractive to start with.

gychang
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Old 13th August 2007, 11:57 AM   #12
ronc is offline ronc  United States
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Pioneer and super powers from the gamma rays leaking out from under Ron's hat


Gee, i hope not!

All the effect is simply a focused array with a single driver at a given BW.

ron
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Old 13th August 2007, 12:24 PM   #13
OzMikeH is offline OzMikeH  Australia
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Quote:
Originally posted by gychang

I am hopeful the Chang makes it into the family tree. Simplicity of the build is very attractive to start with.

gychang
A weary attempt at humour Ron, You have to admint it does more than it appears to at first glance.

I was all psyched up for complicated cuts in the Bruce, then this comes along with such a simple, smart design. Fortunately it's very flexible so I can still make life hard for myself.
Someone used the work synergistic for one of the earlier variants - this is even more so with the mouth integration.
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Old 13th August 2007, 01:28 PM   #14
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Default Stuffing Matereial

Not sure if you will be able to find it, but, there is a new type off stuffing I ran into. It is rolled furnace filter. Generally used in industrial or building maintenance. The roll found is about 1" thick. This stuffing looks like it would breath better than acoustistuff, or foam, and would layer more evenly than polyfill. Not sure where to start looking for it, but would try the hardware store first. It may be expensive, but so far, minor testing, it works well. The material reminds me of a cross between the fiberglass blankets and sponge-ish cotton.

Beautifull box by the way
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Old 13th August 2007, 01:36 PM   #15
gychang is offline gychang  United States
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Default Re: Stuffing Matereial

Quote:
Originally posted by zayne742
It is rolled furnace filter. Generally used in industrial or building maintenance. The roll found is about 1" thick.

brand name by any chance?

gychang
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Old 13th August 2007, 01:42 PM   #16
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Will find out, but in the meantime.

http://www.filtersusa.com/results.cfm?categoryid=22

http://www.unclejoes.com/furnace_filters_cut_to_fit.htm

It is just plain cut to fit filter. The style given to me has a tacky blue side to it, hepa for hospital use. But, it seems to work great. What is nice, not only is it consistent, but you can cut panels the same size to match cabinets, and if making a MLTL, easily weighed to attain the correct lbs. per sq. in.
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Old 13th August 2007, 03:06 PM   #17
gychang is offline gychang  United States
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Quote:
Originally posted by zayne742
Will find out, but in the meantime.

http://www.filtersusa.com/results.cfm?categoryid=22

http://www.unclejoes.com/furnace_filters_cut_to_fit.htm

It is just plain cut to fit filter. The style given to me has a tacky blue side to it, hepa for hospital use. But, it seems to work great. What is nice, not only is it consistent, but you can cut panels the same size to match cabinets, and if making a MLTL, easily weighed to attain the correct lbs. per sq. in.

great, thanks.

gychang
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Old 13th August 2007, 03:33 PM   #18
Jim G is offline Jim G  Canada
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Default chang

Would the hemp 8 be a candidate for the chang?
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Old 13th August 2007, 04:36 PM   #19
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I doubt it'd go straight in, but there's no reason why one couldn't be designed for it. I'm snowed under with work at present, but I'll do my best to look into it in the near future.
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Old 14th August 2007, 07:42 PM   #20
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Hi Gychang!

I am curious how you feel about the sound of the B20 in this new cabinet. As for the tweeter, the one you reference is probably fine. I may need to buy a pair to test with my current setup so we can compare notes on the overall sound of these cheap but cheerful projects. I like the B20 running full out with the piezo on top, but cutting a little deeper down into the B20s response may not be such a bad idea. This may be the best way to take classic components and bring them up to modern standards. The cabinet can be key and the way it enhances the sound will need description in loving detail when you get a chance.

Thanks,
Godzilla

PS, I do feel you will want a tweeter with the B20.
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