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Old 6th December 2015, 11:54 PM   #1
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Default Help - PMC TB1 speakers - replacement LF Woofer

Hi,
I have blow one of the LF drivers in my PMC TB1 monitors and PMC want to charge me a whole lotta cash to replace it... It seems the original LF Drivers are no longer available so I would need to replace the LF drivers in both speakers. The replacements are a little larger so some enlarging of the opening is necessary. The total cost if done by the good people @ PMC will be approx 600.
However if I knew the make of the LF driver in question (which I don't) I would be very confident in doing the job myself

Does anybody know what driver i need to get or is it possible to upgrade the drivers in both speakers, or are there any other suitable replacements drivers available...?
any help or info would be much appreciated, I really like my TB1's and would love to continue to use them
all the best
hally
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Old 7th December 2015, 01:10 AM   #2
sreten is offline sreten  United Kingdom
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Hi,

The drivers were made by Vifa.

rgds, sreten.
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Old 7th December 2015, 01:23 AM   #3
xrk971 is offline xrk971  United States
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I think it is an M17WG. You might be able to find one eBay. I built a tribute to a TB-1 using Dayton drivers and all active and it sounds very good. Correct amount of damping is critical.
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Old 7th December 2015, 04:29 AM   #4
system7 is offline system7  United Kingdom
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The Vifa P17WJ-00-08 Woofer seems to be the same chassis (so it'll fit) as the M17WG, which I assume is also a polycone.

Frequency response is identical. Only real difference is the bigger magnet P17WJ is a reflex type Fs 37Hz Qts 0.35 Le 0.55mH, rather than the M17WG Fs 44Hz Qts 0.46 Le 0.8mH. Vas is 34.7L for both.

I shouldn't think that will matter much in a damped line. But others might have a more informed opinion.
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Last edited by system7; 7th December 2015 at 04:40 AM. Reason: Added data
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