Bextrene surround replaced w Foam...does crossover need changing ? ESS AMT 1B

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robmeister

Member
Joined 2004
I recently was gifted a set of ESS AMT 1B speakers , the woofer was designed for Bextrene surrounds. The previous person replaced those surrounds with foam instead of Bextrene or rubber...
Since the crossover was designed for the bextrene characteristics, shouldn't the crossover also have changed to now accommodate the woofer with foam ?
I also have AMT 1A speakers which originally came with foam surrounds, the crossover in that model is significantly different than the AMT 1B crossover.
Any suggestions ? Do I now need to go with the same crossover as the AMT 1A?
Any thoughts on the topic are appreciated
Thanks
 
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boswald

Member
Joined 2014
Paid Member
Don't worry. The surround change will have a small effect on the woofer's response at the top end, but ESS crossed a couple of octaves below that region.
There will also be a small change in T/S parameters, but not enough to require retuning the box, your room effects dwarf any of that.
 
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