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In Reply to: Re: Dual chamber 'aperiodic' boxes for 'sealed-box' woofers - any rules of thumb on how to build em? posted by freddyi on December 07, 2000 at 09:09:28:
Please post what you know about them. Have you heard a pair?
Thanks.
Follow Ups:
Hi Neward -gee its been twenty-two years sunce I had the A35 - I used two per side with a Citation 12 amp, perhpas a Citation IV preamp - they e pretty nice really I liked the SEAS tweeter and when using a total of four, they could play the Basie band nicely in a modest-sized room.
The woofer was a 10" SEAS with rubber surround and the tweeter was a fabric 1" SEAS having I beleive an electrical 2nd order hi-pass filter - I don't remember any crossor on the woofer - saved moncy and the SEAS 10" had a smooth acoustic rolloff,
I think the volume was divided like that of a 'classic' dual chamber reflex - so the woofer wnet into the larger chamber of about 2/3 of the box volume and there was another chamber formed by the partition which had a small slot -perhaps 3/8" by 6" ?? with a layer of thin open-cell foam over the slot. This supposely tuned 5Hz
As Dynacp made tube amps, i think that may have been part of the advertising ploy and impetus to flatten the input Z.
Now to the death of the Dyna A35 - the Tion IV was a tube design which exhigited turn-on/off pulses and one day I accidently turned the preamp off before the amp - not good with solid-stae stuff which can basically react to DC. It took all four woofers. Dyan was gracious enough to replace all but UPS finished them with their famous
service - upon return all four cabinets were thrashed with the corners crushed - I didn't get anything from UPS.Still, in retropsct those were decent little speakers and I personlly think some of today's stuff is worse.
best wishes
Freddy
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