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Old 23rd August 2014, 07:16 PM   #1
JackM11 is offline JackM11  United States
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Default Using Scan-Speak 15W8531K00

I would like to use the 8531K00 in small a PartsExpress 0.28 cu ft cabinet using a port.
Is the cabinet too small? I like to keep the cabinet small if possible.

I have a pair of Usher 9950-20 tweeters. Would this work well enough with the woofer?
I have the mentioned parts and ready to go.

Thanks in advance for any suggestions.
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Old 23rd August 2014, 07:35 PM   #2
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Quote:
Originally Posted by JackM11 View Post
I would like to use the 8531K00 in small a PartsExpress 0.28 cu ft cabinet using a port.
Is the cabinet too small? I like to keep the cabinet small if possible.
You'll get a bit more bass if you can go to 0.375 cu ft. Seems a shame not to get the most from these little woofers.

jeff
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Old 24th August 2014, 12:08 PM   #3
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Make it an extra space beyond the 8.6L = 0.30ft³ because this driver needs an extra long port or you will end with a to tight small speaker.
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Old 24th August 2014, 01:07 PM   #4
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Download one of the free speaker box modeling programs. With that tool you will be able to see the response of your very highly regarded driver in a variety of box sizes. They pick one that will suit your size needs and maximize bass extension.
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Old 24th August 2014, 07:04 PM   #5
Lojzek is offline Lojzek  Croatia
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Jack,

With 2" in diameter, the length of the port would be around 12"
and you would probably need to find a solution ( elbow) to fit one.

This was simulated using Woofer Box and Circuit designer.
Jeff Bagby's Software Page

With the right XO filter it would sound very good.
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Last edited by Lojzek; 24th August 2014 at 07:09 PM.
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Old 24th August 2014, 09:19 PM   #6
Hampes is offline Hampes  Sweden
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trolle used 0.43 cu ft
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Old 24th August 2014, 10:02 PM   #7
sreten is offline sreten  United Kingdom
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Hi,

Can't find the 8531K00 and suspect with real world driver
parameters your only sensible option is sealed that small.

rgds, sreten.
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Old 25th August 2014, 05:09 AM   #8
JackM11 is offline JackM11  United States
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Thanks everyone for your suggestions.
It seems I need a bigger box, say a PartsExpress 0.38 cu ft(10.7L)box.
Hopefully with a bigger cabinet the port length is more reasonable. I guess a smaller 1.375 inch port is too small.
I am going to do some simulations. Thanks again.
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Old 25th August 2014, 07:11 AM   #9
Lojzek is offline Lojzek  Croatia
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Quote:
Originally Posted by JackM11 View Post
I guess a smaller 1.375 inch port is too small.
According to Zaph, I quote:

"For vented boxes, most woofers 6.5" and under use a Parts Express 1.5" flared port.
My own experience finds people making their ports *way* larger in diameter than they
need to be, which relates to longer ports."

End of quote.

So he sais under Enclosures topic:
Zaph|Audio
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Last edited by Lojzek; 25th August 2014 at 07:16 AM.
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Old 25th August 2014, 07:48 AM   #10
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There is another way : passive radiator.
My vol. = 13.5 liters and an old Philips passive. I tuned , by imp. curve, the passive by adding weight.
Weight = self adhesive bitumen pads.
The idea was based on the "old" Sonus Faber extrema.
I use a kind of sine-cap x-over as wel.
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