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Discussion Starter #1
The spec's for this Sub are now unavailabe. Was wondering if there is anyway of modeling a new box without correrct Driver parameters?. I currently have this driver in a 60 lt 29hz tuned and was wanting to build a different box. Mike P kindly found this link for me for a car application.

magnat.sk/dokumentacia/XTC1200br.pdf

I found a sub that was very similar to one I have on Magnat's website.

Qts 0.31
Qes 0.33
Qms 8.00
Vas 81 L
Fs 30 Hz
Xmas 16mm
SPL 90 db
Pe 300 w

Not sure if any of this is relivant as its a different driver.

Any help would be great, Thanks in advance.
 

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"Similar" can mean totally different parameters, thus different box requirements. Each sub is specific. Your options are contact Magnat and ask if the parameters are even close to the XTC-1200. Or build a box using the parameters and be prepared to be disappointed. Or sell the sub and buy a new one.
 

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Discussion Starter #3
Ill go with the latter, Sell it.
I've been eye off Mach 5 Audio IXL 12"

affordabledrivers.com.au/index.php?main_page=product_info&cPath=3_19_7&products_id=3

Should I go with the recommended box size?. Am only running 350 w plate amp.
 

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Discussion Starter #6
I found some of the spec's.
The driver is currently in a 60 lt box with Adjustable tuning 19hz to 45 hz with a 260 wrms plate amplifier with 35 hz boost and no rumble filter, the box can be reduced in size. I use it mainly for music and a little HT. Any help to make it as good as it can be. Thanks heaps for your reply.

Fs: 34Hz

Qes: 0,29

Qms: 5,4

Qts: 0,28

Vas: 70l

Re: 3 Ohm

SPL: 93 d
 

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Discussion Starter #8
Im just about to start the new box. I will put a rumble filter on, check out the link. http://www.edesignaudio.com/product_info.php?cPath=2_123&products_id=657
I will build the 85 lt tuned to 25 hz. I have no retraint's on size, so could you help me with an optimum box h.w.d and the correct placement for the driver and port. Will a single 108 mm port with flared end's be enough to limit chuffing?.
Thanks again.
 

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Discussion Starter #12
jaycar cat.AA-0501 240w rms into 4 ohm's
Frequency Response 20 to 160 hz
6db Bass boost @35 hz

Does that help. Is 6db boost to much, will it still work in 85lt box.
 

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The only way the amp will work with the sub is if it has a high pass filter at 22 hz to stop over excursion. It appears the Jaycar amp can have the HPF modified by changing 2 resistors, contact Jaycar for the information. The SPL graph is with 6 db of boost at 35hz and a HPF at 22 hz.

magnat.JPG
 

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Discussion Starter #17
And so it begin's. Went with 18mm mdf

H 815 mm
W 450 mm
D 360 mm

2 x 100mm port's @ 800mm long each, port's will be mounted on the bottom with 4 inch leg's.

working volume 85 lt tuned 25 hz.
 

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Discussion Starter #19
Will the port's on the bottom be OK? My current box is the same and seem fine. Or should i front fire them with a bend?
 
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