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Old 29th April 2010, 02:54 AM   #1
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Default Opinions wanted on a car sub

Battle Series

Some background:
I'd like your thoughts on whether or not these subs are suitable for home theater use (I listen to an equal mix of movies and music). Since I am a college student and have 2 of these laying around I'd figured I'd ask some knowledgeable people if they thought I could use them or if I'll have to save up and get something like a shiva or titanic.

I'd like to build a sonosub (or two) with them due mostly to cost and the simplicity to design a sonosub. Being a college student WAF is not an issure and I have plenty of woodworking experience so if you guys think something crazy like transmission line or folded horn would work well with these by all means please let me know.

Also, are the T/S parameters listed on their site enough to model with Winisd? I entered in all the numbers given on the site and winisd gave me a graph but I don't trust it since I dont know if winisd is smart enough to ignore all the zeros i had for most of the parameters.

I know this is sizeable request to read, so thanks to those who take the time to read it.
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Old 29th April 2010, 06:01 AM   #2
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How cheap are they, it is the sort of driver I'd use to build subs for 16 YO's but if the price is right you COULD use them for parties, Fs is quite high and Qts probably best for infinite baffle use, so Sonotube and sealed in corners would be my guess without going to the trouble of modeling them
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Old 29th April 2010, 02:00 PM   #3
Glowbug is offline Glowbug  United States
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It'd be better to save up for something like you mentioned (Shiva-X2 or Titanic), but they'd work in the meantime.
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Old 29th April 2010, 02:52 PM   #4
bjorno is offline bjorno  Sweden
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Quote:
Originally Posted by schnottus View Post
Battle Series
...something crazy like transmission line or folded horn would work well with these by all means please let me know...
A T-TQWT was tested..

b
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File Type: gif 2xBattle-XBS-12D_paralleled-coils-T-TQWT.GIF (164.1 KB, 80 views)
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Old 29th April 2010, 06:07 PM   #5
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Bjorno, that would be around 8 feet long, correct? Honestly it's not out of the question.

I'm kind of leaning toward going with Glowbugs advice and saving up for something nicer right now though.
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Old 29th April 2010, 11:22 PM   #6
bjorno is offline bjorno  Sweden
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Quote:
Originally Posted by schnottus View Post
Bjorno, that would be around 8 feet long, correct? Honestly it's not out of the question.

I'm kind of leaning toward going with Glowbugs advice and saving up for something nicer right now though.
Hi schnottus,

You’re right but you must fold the T-TQWT at least once, i.e. 8 feet of total internal length becomes 4 feet int. box height.

Here’s a better I believe more well thought-out example:

b
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File Type: jpg 2xBattle-XBS-12D__20Hz-T-TQWT.JPG (321.0 KB, 71 views)
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Old 30th April 2010, 02:26 AM   #7
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You could try folding it like my POC #1 - see The Subwoofer DIY Page v1.1 - Projects : A "Proof of Concept" tapped pipe* - Construction

That might cut down the longer dimensions even further.
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Old 30th April 2010, 07:01 AM   #8
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Thanks Brian, 4 foot really is perfect though. No need to complicate it

Bjorno - Your numbers made a great starting point for someone new to hornresp, thanks!

I'm liking the looks of the the t-tqwt.
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Old 30th April 2010, 08:57 PM   #9
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Bjorno, I attached an image where I drew the drivers to scale in the box since stacked they would be about half the height of the box. I did this so I can ask What L45 is pointing to in your picture. Is it the height that the port should be at, the height of the middle of the two drivers, or both?

From the looks of the schematic the top driver will be some distance up from the port, is that a bad idea?
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