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PostPosted: Mon Dec 07, 2015 9:32 am 
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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... Does anybody know what driver i need to get to do the job myself or is it possible to upgrade the drivers in both speakers, any help or info would be much appreciated, I really like my TB1's and would love to continue to use them
thanks
hally

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PostPosted: Mon Dec 07, 2015 10:06 am 
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To be honest, I wouldn't replace it with anything by the original. The entire speaker unit is designed to work together: it's not just individual parts screwed and glued into the same box. If you change any one item for something different, it won't work as well. You'd need to change other parts too: crossover, baffle location, port dimensions, internal damping materials, size, location, etc. It is all tuned to work together: the whole is greater than the sum of its parts.

And if you go that far, to re-tune the entire internals for your new driver, you are well into the field of "DIY speaker building"... which is a whole different ball game.

I've seen this happen in person, when I was interested in buying a pair of speakers from second-hand sound gear store: one of the tweeters was cooked, but the other speaker sounded great, and tested very nicely with my spectrum analyzer. The dealer said he would replace both tweeters with "something better": I warned him it probably wouldn't work, but he went ahead anyway. When I went back to test them again, they both sounded terrible, and that was born out by the spectrum analyzer. He trashed them both, basically. The driver he used was decent, but it was not designed to go in that box, and the box was not designed for that tweeter. That tweeter in a properly designed box with a matching crossover would have been great... but not as a replacement for the one I was looking at.

So I'd either look for the exact same driver that you already have on e.Bay or some place similar, or just swap out both of the speakers for something better.


- Stuart -

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PostPosted: Mon Dec 07, 2015 10:35 am 
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Thanks Stuart for your prompt reply.
You are absolutely right in your comments and I'm not suggesting for a second to put any old driver in the cabinet and hope it will sound good, the issue with a lot of PMC designs is that they use modified or specifically designed versions of driver brands and unless u have the inside track its hard to tell if u are dealing with the off the shelf driver or a version modified for PMC. Also the replacement driver PMC offer for the TB1 LF driver is different, it is infact the same LF driver that is used in the later TB2 models. The original LF driver used in the TB1 is no longer being manufactured. My research so far has revealed that the original driver was a
VIFA M17WG-09505, I am hoping somebody might know what LF driver is suitable as its replacement?

thanks

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https://www.youtube.com/watch?v=axOaqMRg8w8&list=PLxCcy-82DpyLiB_PumxzHAv7fnrSkX111
https://www.instagram.com/hallymusic/


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PostPosted: Wed May 25, 2016 6:14 pm 
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It's great for advice It is very good for me as I am a spammer, so you all know to ignore everything I say.


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