High quality small PR sub design? - AVS Forum
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post #1 of 14 Old 02-20-2014, 03:01 PM - Thread Starter
 
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Hi,

I might be interested in building a small passive radiator design subwoofer.

The budget is $1000. The goal is to have the most 18Hz and above output in an enclosure size hopefully less than a 15'' cube.

Are there any designs out there? I saw the 12'' Peerless XLS design, but I was hoping for a design revolving around a higher powered driver

If not, any suggestions on the driver, amp, and other stuff in a DIY build?

Thanks
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post #2 of 14 Old 02-20-2014, 03:15 PM
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post #3 of 14 Old 02-20-2014, 09:42 PM - Thread Starter
 
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What am I supposed to find there?
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post #4 of 14 Old 02-20-2014, 09:46 PM
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What am I supposed to find there?
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post #5 of 14 Old 02-20-2014, 11:08 PM
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http://www.creativesound.ca/

What am I supposed to find there?

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post #6 of 14 Old 02-20-2014, 11:18 PM
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I have the D dual PR in my bedroom and I'm flat down to 14hz. Beware that 12" SDX is 40# though. Not your typical 12" by no means.

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post #7 of 14 Old 02-21-2014, 02:47 PM
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A 15" cube is going to be small for a 12" ported sub, especially if its tuned low.

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post #8 of 14 Old 02-21-2014, 02:49 PM
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A 15" cube is going to be small for a 12" ported sub, especially if its tuned low.
Thats why you use passive radiators (PRs) instead of ports :-D
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post #9 of 14 Old 02-21-2014, 02:49 PM
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Yeah, forgot about that. A 15" cube is about 1.4cu ft before drivers and bracing...

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post #10 of 14 Old 02-21-2014, 06:22 PM
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The SDX roughly likes about 2.6cf (18" cube) before .5ish for displacement. A guy can go smaller though.

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post #11 of 14 Old 02-21-2014, 09:17 PM - Thread Starter
 
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The SDX 15 doesn't seem like a very good performer either when looking at the data-bass results and comparing it to the LMS-R 12. A 15'' driver would most likely be too large for what I want if I want to stay near a 15'' cube.

Are there any better 12'' woofers than the 12'' LMS-R for low bass output in small enclosures?
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post #12 of 14 Old 02-21-2014, 09:45 PM
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A 15" cube really wont give you the enclosure volume needed for a low tuned sub even with PR's, the drivers will eat up too much volume. You really need to go with a 16" cube. A 10" driver would also be more optimal for digging deep in low volume. Yes you are going to give up output and sensitivity, but that is the trade off for low and small. A HiVi SP10 paired with dual CSS APR12's (loaded at 900g) will basically get you flat to 20hz and handle about 650 watts.
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post #13 of 14 Old 02-22-2014, 12:35 PM
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The SDX 15 doesn't seem like a very good performer either when looking at the data-bass results and comparing it to the LMS-R 12. A 15'' driver would most likely be too large for what I want if I want to stay near a 15'' cube.

Are there any better 12'' woofers than the 12'' LMS-R for low bass output in small enclosures?

I was speaking 12" SDX. The LMS-R pretty much rules though. I have not even compared the two on paper or sim though.

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post #14 of 14 Old 02-22-2014, 03:35 PM
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I put 1200w to the 12" SDX as apposed to 2000w to the 12" LMS-R in 3cf. The excursion is used up with the LMS but the SDX has more to give. I'm afraid to put more than 1200w to it though. Making a attempt at being realistic. Throw the 15" SDX in it would be interesting, but not a driver you think much of although I differ.


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