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Old 17th February 2010, 06:40 AM   #1
Thims is offline Thims  Australia
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Default Exodus vs JL 13W7 vs Peerless subwoofer

Hello, i am currently building a custom home theater (7m x 6m x 3m) and are wanting to seek others advice on the cleanest sub i can build with impact.
I have used many dual Peerless subs previously with good results but am wanting a bit more.
I want to use either 4 x 12" 830847 peerless subs or 2 x JL 13W7 subs or 2 x 21" Exodus subwoofers. Or sshould i go for something else like Audio Pulse? (i had 2 x TC Sounds LMS 15's but sold them)

Flexible with type of cabinets but prefering sealed.

Any feedback or experiences with these drivers would be greatly appreciated.
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Old 17th February 2010, 02:42 PM   #2
bjorno is offline bjorno  Sweden
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Quote:
Originally Posted by Thims View Post
...Flexible with type of cabinets but prefering sealed.

Any feedback or experiences with these drivers would be greatly appreciated...
Hi Thims,

FYI, My contribution concerns only the suggested Peerless 830847 woofers.

I would first build a main sub to be placed close to one of the shorter walls, a T-TQWT, and then 3-ported boxes with the flexibility to be driven with closed ports (Bessel Qtc).

b
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File Type: gif Peerless-830847-ported-closed-Qt,Qtc-0,577.GIF (83.9 KB, 372 views)
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Old 17th February 2010, 04:53 PM   #3
Glowbug is offline Glowbug  United States
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Dual 21"s get my vote
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Old 17th February 2010, 05:14 PM   #4
TerryO is online now TerryO  United States
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I'd go for the Exodus Audio subs, they're a high quality product with technically advanced features.

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Old 17th February 2010, 08:59 PM   #5
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Old 17th February 2010, 09:12 PM   #6
Pallas is offline Pallas  Pakistan
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The 4x XXLS sounds like the best option of the three presented.

The JL W7 doesn't have Faraday rings in the motor, so despite its admirable BL linearity it suffers from the typical amusicality of long-coil overhung woofers due to high inductance and inductance variation.

Nothing wrong with the Mael-21 except for the box size required. (Remember that it's a motor originally designed for an 18" cone, with a much larger top assembly bolted to it.) Also, size/finances may limit you to two, and the more subs one can place around a room, the better. If you can find the space for three Mael-18's you'll be better off.

The XXLS 12 is a known high quality woofer with a well-designed motor and suspension, and four of them placed properly will yield smooth response all over the room.

However, an option that would be more space-efficient and better sounding would be to combine a couple of your options. Consider using one bruiser sub (a Mael-21, say) and then two XXLS's (or even, if budget is a concern, Peerless SLS12's) as secondary subs. Put the bruiser in the corner, one of the secondary subs far away from it, and the third far away from either of the other two and above the room's centerline.
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Old 18th February 2010, 04:52 AM   #7
Thims is offline Thims  Australia
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Thank you all for your reply's.

What advantage would there be placing a single driver in a T-TQWT on a shorter wall with 3 other (ported sealed) subs. I understand using multiple subs gives a better room response but am trying to work out why 1 would be different?

So far 4 Peerless drivers looks like the way to go.

Thanks
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Old 18th February 2010, 04:22 PM   #8
bjorno is offline bjorno  Sweden
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Quote:
...What advantage would there be placing a single driver in a T-TQWT on a shorter wall with 3 other (ported sealed) subs...
Hi Thims,

That could work well and is the very first approach I would test too.

b
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Old 18th February 2010, 09:42 PM   #9
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I'd consider 3 or 4 of the 18" Maelstrom, personally - you can get it into a much smaller enclosure, and multiple distributed subs are always preferable.
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Old 19th February 2010, 12:31 AM   #10
Pallas is offline Pallas  Pakistan
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Quote:
Originally Posted by Thims View Post
Thank you all for your reply's.

What advantage would there be placing a single driver in a T-TQWT on a shorter wall with 3 other (ported sealed) subs. I understand using multiple subs gives a better room response but am trying to work out why 1 would be different?

So far 4 Peerless drivers looks like the way to go.

Thanks
I'm not sure I understand the question. Why would you want to put all those subs on one wall? Doing so might give you more SPL, but it will do nothing to smooth out the response.

If you're asking why one could be different, in truth they can all be different. Might even be some advantages in that, as you further randomize room mode excitation by using different subs. But it doesn't matter that much. Different placement will tune the same sub differently, anyway.

In general, I prefer all sealed subs, because that way you don't have any of the extreme-LF phase problems that can come with woofers unloading, etc. Also, sealed subs are smaller subs, for a given woofer.

A quarter-wave pipe probably isn't the best idea for a sub anyway, given the size required.
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