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Old 2nd July 2006, 09:31 PM   #1
Jaime is offline Jaime  Uruguay
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Default Old 12” Philips woofer

I have an old 12” Philips woofer but I do not know the designation.
I believe that it was made between 1970 and 1975. It has rubber surrounding.
Which is the designation?
Which is the Thiell and Small parameters?

Best regards Jaime
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Old 2nd July 2006, 10:07 PM   #2
Netlist is offline Netlist  Belgium
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With a picture and a little luck, some of us might be able to help.

/Hugo
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Old 2nd July 2006, 10:33 PM   #3
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Quote:
Originally posted by Jaime
I have an old 12” Philips woofer but I do not know the designation.
I believe that it was made between 1970 and 1975. It has rubber surrounding.
Which is the designation?
Which is the Thiell and Small parameters?

Best regards Jaime
This is a joke, right?
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Old 3rd July 2006, 12:14 AM   #4
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I can't see where the insertion of humor would be

T/S params can easily be obtained on an unknown driver with equipment I'm sure >50% of us have:
http://www.mhsoft.nl/messen_en.asp

And the numbers stamped on the frame are traceable online with popular manufacturers, like Philips.
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Old 4th July 2006, 08:18 PM   #5
Jaime is offline Jaime  Uruguay
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Default I feel the idiot question

The driver is inside an enclosure.
I had an hemiplejia and manual work is very difficult. I need to ask another person to open the box.
I believe that Philips must not have made many models 12” woofer, rubber surround, between 1970 and 1975.
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Old 11th July 2006, 07:19 PM   #6
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It must be the AD 1255 W4 or AD 1255 W8. They were made between 1973 and 1978
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Old 28th July 2006, 12:03 AM   #7
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or a 1256w4/8

these are certainly an above average speaker

similar stuff-

http://www.mfbfreaks.nl/folders/1974...s/image23.html
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Old 8th August 2006, 05:25 PM   #8
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Jaime,
Iīm from Montevideo, too, and I have some long, long affaire with philips drivers, so it is possible that digging deep in my library I could find some specs of that driver of yours. Usually, philips woofers were designed to be used in acoustic suspension alignments, giving optimal volume as one of the few parameters in their catalogs, but fullrange ones as the 9710M and for instance AD12100M were best suited for alignments such as bass-reflex or horns, where no high x-max were needed or wanted.
Cheers,
Mar
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Old 9th August 2006, 08:01 AM   #9
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Philips didn't publish T/S specs back then. We were using the 8s, 10s, and 12s.

The attached pic is for a modifed pair used in a quite successful push-push aperiodic subwoofer. This was before i was measuring everything...

dave
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