Thread: SM40 Double Stacking Question
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Old 07-02-2013, 04:23 AM
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Merlin66 (Ken)
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Merlin66 is offline 		 
Join Date: Oct 2005
Location: Junortoun Vic
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Hans,
They don't have to be factory matched.
I use a double stack of SM60 filters on the front of my ED80.
Tuning is a bit fiddly, but when you understand the principle, it works very well!
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