Recommend enclosure for ED 13Ov.2 Subwoofer - diyAudio
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Old 10th August 2010, 04:23 AM   #1
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Default Recommend enclosure for ED 13Ov.2 Subwoofer

I was given this driver by a friend, is it a good subwoofer?

Would it be suitable for a tapped horn or transmission line loading?

Thanks a lot!

Qts: .28
Qes: .30
Qms: 3.3
Fs: 21.00Hz
Re: 8.3
Vas: 176L
Mms: 195.0g
Bl: 21.70T*m
SPL: 89.1dB
Sd: 545cm²
Xmax: 18.3mm
Voice Coil: 62.5mm

Magnet Width: 6.750"
Cutout Diameter: 11.000"
Mounting Depth: 6.600"
Weight: 25lb
Total Height: 7.600"
Displacement: .07 ft³
Outside Diameter: 12.375"
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Old 10th August 2010, 04:34 AM   #2
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I had the opportunity to measure the t/s parameters of a 13Ov.2 about two years ago, using a WT3. t/s specs were nothing like the published ones. They were as follows:

Re: 7.256 (coils in series)
Fs: 28.3 Hz
Qts: 0.456
Qes: 0.496
Qms: 5.697
Le: 3.454 mH

I suggest getting the specs for your driver measured (or measure them yourself - see my site for a means to do this) before committing to anything like a transmission line or tapped horn.
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Old 10th August 2010, 04:55 AM   #3
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Thanks Brian!

Bummer. So did you build an enclosure for the driver? Any chance you recall what might be a suitable alignment?
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Old 10th August 2010, 05:14 AM   #4
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Quote:
Originally Posted by rhapsodee View Post
Thanks Brian!

Bummer. So did you build an enclosure for the driver? Any chance you recall what might be a suitable alignment?
I didn't build an enclosure for it. I was just checking the parameters for the owner. FWIW, the t/s params for my eD 13Kv.2 were also off.
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Old 10th August 2010, 09:08 PM   #5
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Using the T/S parameters from Brian...running the numbers makes for a driver NOT suited to a TL nor a vented alignment.
However it would run quite well at 4.425513017 cubic feet, sealed. Qtc = .707

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Old 11th August 2010, 11:33 AM   #6
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Quote:
Originally Posted by Richard Ellis View Post
...running the numbers makes for a driver NOT suited to a TL nor a vented alignment...
Don't agree, As I found this driver suitable for a T-TQWT, thus a ported or a TL should work too:

b
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Old 12th August 2010, 05:16 AM   #7
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I thought a driver should have a higher Qms to do front loaded designs...
No fair having a SIM program to do all the number crunching!

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Old 12th August 2010, 05:19 AM   #8
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Quote:
Originally Posted by Brian Steele View Post
I suggest getting the specs for your driver measured (or measure them yourself - see my site for a means to do this) before committing to anything like a transmission line or tapped horn.
Just repeating my suggestion. You might end up with disappointing results if you build a sub based on either the published specs (or my measurements) and it turns out that your driver isn't a close match for either.

At the very least, measure Fs, to see if it's closer to 21 Hz or 28 Hz.
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