PDR-12 blown woofer - AVS Forum
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post #1 of 19 Old 06-15-2014, 07:24 AM - Thread Starter
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PDR-12 blown woofer

I have a Paradigm PDR12 Subwoofer with a blown woofer. I would like to find a replacement for it. Any ideas where to get one? What is 15 kOhm?

Specs say it is.
  • Amplification type
    active
  • Woofer size (inches)
    12" in
  • Nominal (RMS) output power
    110 Watt
  • Input impedance
    15 kOhm
  • Crossover frequency
    50 - 150Hz

Last edited by brian_tr; 06-15-2014 at 08:10 AM.
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post #2 of 19 Old 06-15-2014, 07:31 AM - Thread Starter
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I took the woofer out and the foam around it is completely gone. The speaker sounds really bad. No bass at all just muffled sound. Would just the bad foam cause this?
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post #3 of 19 Old 06-15-2014, 07:45 AM
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Originally Posted by brian_tr View Post
I took the woofer out and the foam around it is completely gone. The speaker sounds really bad. No bass at all just muffled sound. Would just the bad foam cause this?
That's exactly what bad foam causes. have it re-foamed or replaced.
>Any ideas where to get one?

Paradigm?

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post #4 of 19 Old 06-15-2014, 07:52 AM - Thread Starter
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Yes it is a Paradigm. Would like to just replace the driver but not sure what to get. Part number on speaker is B156WFPDR0012 0599

Last edited by brian_tr; 06-15-2014 at 07:55 AM.
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post #5 of 19 Old 06-15-2014, 08:04 AM
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Unfortunately, your best bet may be to contact Paradigm and see if they can sell you a replacement. Other than that, you could contact Parts Express on the phone and ask them if they are familiar with the PDR-12 and what replacement they may have. I'd suggest re-foaming it yourself, but it's a tricky procedure. Another option may be to get it refoamed as suggested above, if there are reputable places near you.
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post #6 of 19 Old 06-15-2014, 08:22 AM
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You can get a driver re-coned. Personally I'd probably buy a new sub, get yours re-coned and perhaps use it for second system.

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post #7 of 19 Old 06-15-2014, 08:35 AM - Thread Starter
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You can get a driver re-coned. Personally I'd probably buy a new sub, get yours re-coned and perhaps use it for second system.
I have another sub. Just got a 7.2 reciever and wanted to use it for second sub.
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post #8 of 19 Old 06-15-2014, 08:45 AM
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Here is a link from simply speakers. I googled "pdr 12 replace woofer" and got this among other links. If you can scroll down on the link, you will see that 2 reviewers of the woofer used it with good results as a replacement in their PDR-12.

http://www.simplyspeakers.com/replac...-w-12pc-4.html
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post #9 of 19 Old 06-15-2014, 09:12 AM - Thread Starter
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Originally Posted by audio4life View Post
Here is a link from simply speakers. I googled "pdr 12 replace woofer" and got this among other links. If you can scroll down on the link, you will see that 2 reviewers of the woofer used it with good results as a replacement in their PDR-12.

http://www.simplyspeakers.com/replac...-w-12pc-4.html
Thanks for the link. I think speaker is 8 ohms and they have a 8 ohm version of that speaker. Would probably better with it if the paradigm is 8 ohm. Not for sure if 8 or 4 though.
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post #10 of 19 Old 06-15-2014, 12:47 PM
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Quote:
Originally Posted by audio4life View Post
Here is a link from simply speakers. I googled "pdr 12 replace woofer" and got this among other links. If you can scroll down on the link, you will see that 2 reviewers of the woofer used it with good results as a replacement in their PDR-12.
http://www.simplyspeakers.com/replac...-w-12pc-4.html
With only 4mm xmax it would be very weak in maximum output. The minimum I'd consider for even moderate listening levels is 8mm. A high quality sub driver will have at least 12mm xmax.

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post #11 of 19 Old 06-15-2014, 01:16 PM - Thread Starter
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With only 4mm xmax it would be very weak in maximum output. The minimum I'd consider for even moderate listening levels is 8mm. A high quality sub driver will have at least 12mm xmax.
I think I will try to re-foam it. Hopefully that is all that is wrong. I measured with meter and reads 3.8 ohms so I would guess it is a 4 ohm speaker.
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post #12 of 19 Old 06-15-2014, 01:48 PM
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tbh I wouldn't pay to get it re-coned, I'd just DIY. PDR-12 is a old sub, so driver tech has moved forward, a better quality newer driver should give it a lease of life. Ie mates old Rel Q100E wasn't impressive then, and it certainly wouldn't be now if you repaired the cone, hopefully replacing it with a higher quality driver with more output, should enhance it.ie

http://www.bkelec.com/HiFi/Drive_Uni...eplacement.htm

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post #13 of 19 Old 06-15-2014, 01:52 PM
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Quote:
Originally Posted by Bill Fitzmaurice View Post
Quote:
Originally Posted by audio4life View Post
Here is a link from simply speakers. I googled "pdr 12 replace woofer" and got this among other links. If you can scroll down on the link, you will see that 2 reviewers of the woofer used it with good results as a replacement in their PDR-12.
http://www.simplyspeakers.com/replac...-w-12pc-4.html
With only 4mm xmax it would be very weak in maximum output. The minimum I'd consider for even moderate listening levels is 8mm. A high quality sub driver will have at least 12mm xmax.
Do you have any idea what the xmax is for the stock woofer? Or if installing a woofer with 12mm xmax would be a bad combination for the box or amp? This was more of a budget model from 15 years ago or more, if judging by the foam rot is any indication, and I doubt its amp could drive such a woofer without damage of one kind or another.

Last edited by audio4life; 06-15-2014 at 02:04 PM.
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post #14 of 19 Old 06-15-2014, 02:22 PM
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Originally Posted by audio4life View Post
Do you have any idea what the xmax is for the stock woofer? Or if installing a woofer with 12mm xmax would be a bad combination for the box or amp? This was more of a budget model from 15 years ago or more, if judging by the foam rot is any indication, and I doubt its amp could drive such a woofer without damage of one kind or another.
You can never have too much xmax. A sub loaded with a driver with 4mm xmax would not be able to handle more than 30 watts before severe distortion occurred, perhaps 90 watts before mechanical damage is a possibility. 4mm is marginal even for a standard woofer that's not expected to be used below 40Hz.

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post #15 of 19 Old 06-15-2014, 02:30 PM
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The PDR-12 is about 20 years old now? Drivers have come a long way since then...

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post #16 of 19 Old 06-15-2014, 10:58 PM
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I refoamed a PDR-10 with a kit from speakerworks.com. i actually use those kits for various paradigm speakers(titans/atoms)...work great! Paradigm speakers from the 90's thru early 2000's were notorious for rotting foam after 5-10yrs.
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post #17 of 19 Old 06-16-2014, 02:26 AM
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My NHT speakers have foam surrounds, they've discoloured a bit, but still seem ok. I guess UV makes foam fall to bits, and they're out of sunlight.

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post #18 of 19 Old 06-16-2014, 05:30 AM
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My NHT speakers have foam surrounds, they've discoloured a bit, but still seem ok. I guess UV makes foam fall to bits, and they're out of sunlight.
First generation foam surrounds started failing in droves in the 90s, since then the foam formulation has been changed to resist UV and rot.

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post #19 of 19 Old 06-21-2014, 02:06 PM - Thread Starter
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I re-foamed my sub today and it actually works. Thanks for the help! Two subs really sound nice Got two more mini monitors on ebay When get them hooked up will have 7,2. Life is good.

Last edited by brian_tr; 06-21-2014 at 03:34 PM.
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