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PeteMcK 17th May 2005 09:42 PM

Close to the Edge
 
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Thanks to that amazing piece of software 'The Edge' I've made a simple Q&D OB. The Edge had the driver placed closed to one edge of the baffle, & although I was sceptical about this I tried it, and it worked amazingly well.
Now I want to know why I can't make the baffle like this?:

MethMan 18th May 2005 02:36 PM

Irregular polar response? Hard to eq. roll off?

454Casull 18th May 2005 04:55 PM

Mechanically unstable? ;)

PeteMcK 29th May 2005 10:48 PM

before...
 
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sounded more forward in lower mids than my Peerless 850488's (in 4L boxes), but about the same amount of low end:

PeteMcK 29th May 2005 10:54 PM

after...
 
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Immediately noticed an 'enclosed' feeling to the sound, not as good as the flat baffle (need to do more listening). Ameliorated a little by turning the corner to the front. Tried swapping L & R sides - immediately noticed an improvement in low end; so my time wasn't wasted. So for asymmetrical baffles, the long side should be on the inside?

planet10 30th May 2005 06:23 AM

What driver is that? 6x9?

dave

PeteMcK 31st May 2005 03:41 AM

Sony
 
Hi Dave,

Its a 165x65 cm unit out of an old Sony tape recorder,
sorry don't have the part # handy, but it sounds good & has a reasonably wide range; I'm planning to add piezo tweeters & 12" woofers when I sort out a good baffle shape (which will probably be an asymmetric pentagon); I'll Damar it as well.

Cheers,
Pete McK

planet10 31st May 2005 06:37 AM

Re: Sony
 
Quote:

Originally posted by PeteMcK
Its a 165x65 cm unit out of an old Sony tape recorder,
cm? That is a monster... i just scored some alnico ones 203x100mm

dave

PeteMcK 31st May 2005 07:18 AM

err..make that mm
 
sorry, much smaller.

Actually, I do have a pair of larger oval units of about the same vintage, Magnavox, a defunct Aussie brand I think. These are about 10" x 4", but don't have very good lows & squawky highs due to their whizzer. I've Damared the cones, and I'm going to try some car underseal on the accordion surround to see what change that makes (+ damp the whizzer or remove it).

planet10 31st May 2005 11:13 PM

Re: err..make that mm
 
Quote:

Originally posted by PeteMcK
Magnavox, a defunct Aussie brand I think.
I alsways put Magnavox in the US... my RH84 has magnavox OPTs....

dave


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