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Old 13th March 2007, 08:03 PM   #1
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Default Peerless XLS10 and passive radiator design

Hi,

Looking at building a subwoofer with a peerless xls10 and either 1 or 2 10" peerless Passive radiators.

Now i have been playing around with unixbox and i have come up with the following design based on the xls10 and 1 passive radiator.

The first design i came up with was a 32l enclosure with the xls10 and 1 passive radiator. Now this should give response down to 27hz before the the passive radiator hits max excursion. I have attached a graph of this design.

Now i assumed that if i could use 2 passive radiators then i should be able to come up with a design that gets me down to around 20hz, but playing with unibox i cant seem to come up with a design that will get me to that goal.

Can anyone suggest a way of getting down to 20hz using the 2 passive's and the XLS10?

Thanks,
Greg
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File Type: gif pr response peerless swr 269 10.gif (20.1 KB, 370 views)
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Old 14th March 2007, 01:51 AM   #2
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Maybe this will help. http://www.bamberglab.com/xls.shtml
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Old 14th March 2007, 03:46 AM   #3
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Hi,
I ran the sub you want with two passive radiators on unibox and came up with a design that will give good response down to 20Hz, but the box would be be large (70 litres). What weight PR did you input? 400 grams is what I tried. Adding weight to the PR will lower FB, but you give up some efficiency.
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Old 14th March 2007, 09:43 AM   #4
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I am using 265g passive radiators. I didn't really want to go over say 50l for box size. Maybe i am being to optimistic about the response down to 20hz, maybe i should aim a little higher (although 20hz would be nice!).
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Old 14th March 2007, 11:08 AM   #5
rabbitz is offline rabbitz  Australia
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Have you thought of using the 12" PR instead?

I've found that the excursion shown in the software doesn't directly relate to the real world in most cases. I have FR drivers that should hit the stops at less than 1W but are still powering at 30W.... program material is different. There was a thread in the FR section recently about this.
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Old 15th March 2007, 12:59 AM   #6
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Smaller box means adding mass to passives. This will also reduce excursion. Your 265 gram PR is more suited to a smaller driver, its too light for what you want. Its easy- add weight to the passives in unibox untill you get the response where you want it with the box size you want.
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Old 15th March 2007, 02:46 AM   #7
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Here's a project using the 10" XLS and passive radiator.

http://www.hardwareanalysis.com/acti...tarticle/1789/

And another using a 12" XLS and 2 passive radiators.

http://www.geocities.com/adrian_mack/
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Old 15th March 2007, 10:59 PM   #8
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In Sander's project on http://www.hardwareanalysis.com/act...ntarticle/1789/
he actually adds 200 grams to the 400 gram passive radiator to get the response down to below 20Hz. Well worth reading.
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Old 9th October 2012, 10:05 PM   #9
pegodk is offline pegodk  Denmark
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I have a problem with something of the same build. Got 1 Peerless XLS 10 sub and one xls 10 passive radiator (265 g mms) built into a 30 L box with an amp giving about 160 watts.

My problem is simulation of the excursion of the slave.
I have seen many building guides saying you need to add weight to avoid hitting xmax on the slave.

(for example: Build your own 10" subwoofer, a detailed how-to - Conclusion
and http://www.d-s-t.com.au/data/Peerles..._Subwoofer.pdf

In this design, it doesn't seem like he adds any weight tho..
Peerless XLS10 10" Subwoofer (830452) and Passive Radiator (830481))

When I plot it in bassbox with 160 watts, I get about 18 mm of excursion at around 24-25 hertz.

Am I right that I don't need to add weight to the slave or have I miscalculated somewhere? I hope someone can help me :-)

Regards
Peter
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