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Old 6th November 2008, 10:17 PM   #1
zyfb is offline zyfb  Canada
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Default add a subwoofer to my Proac super tablette

I have a pair of Proac super TABLETTE speaker, want to add a pair of subwoofer to extend its bass. I now have Seas H333 8' woofer, can anyone help me to design the box and the corss over? Thanks
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Old 6th November 2008, 10:28 PM   #2
BHTX is offline BHTX  United States
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Download WinISD Pro and input T/S parameters. Why use a passive lowpass crossover?
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Old 7th November 2008, 01:43 PM   #3
sreten is offline sreten  United Kingdom
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Hi,

The H333 is a high efficiency 8" paper driver suited to vented boxes.

http://www.seas.no/images/stories/vi...33_ca21rex.pdf

Around 20L sealed and stuffed is possible. Or larger vented.
The overdamped case (with same -6dB) is more room friendly.

A passive crossover could work, I'm not sure. Active is much easier.

/sreten.
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Old 7th November 2008, 03:26 PM   #4
Thawach is offline Thawach  Thailand
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hi!


the QB3 alignment vented box is about 40 litres. the passive crossover air core coil is difficult to build because it's very big coil and may be increase R(ohm). but u can use steel core coil because it's lower R. the cut off about 100 hz that i often see.

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Old 8th November 2008, 10:30 AM   #5
Thawach is offline Thawach  Thailand
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zyfb here is the big air core coil for subwoofer. i see it from the company from thailand. it has 2 version(active and passive ) the cut off xo is around 100 hz roll off 12 db/octave.


coil

TW
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Old 11th November 2008, 07:05 PM   #6
zyfb is offline zyfb  Canada
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Quote:
Originally posted by Thawach
zyfb here is the big air core coil for subwoofer. i see it from the company from thailand. it has 2 version(active and passive ) the cut off xo is around 100 hz roll off 12 db/octave.


coil

TW
Hi TW,
Thanks for you suggestion. how can I buy the coil, i have seen it in the WEB, looks good. plesae let me know.
zyfb
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Old 11th November 2008, 10:39 PM   #7
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For your crossover parts, have you looked at Solen?
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Old 15th November 2008, 11:34 PM   #8
Thawach is offline Thawach  Thailand
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hi zyfb

u can use passive xo calculator program for get the valve coil (mh) about 100 hz. when u buy if u want air core coil please choose low DCR. zyfb before u do please check the Sensitivity between proac and sub driver. these are not difference too much. zyfb u can use hi-pass filter order 1 for 4" proac@100 hz. u only use Con in series with 4" proac. if u want to check the respond frequency. i have free RTA to give u.


RTA


regard

TW
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