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Based on the different feedbacks, I'm wondering if there's more science to it than just being subjective.
For example, I'm noticing a slight difference; and my foam is fairly short at 1 1/8" in length. For those who noticed a bigger difference, what's your foam length?
The foam seemed to be molded at a certain diameter but cut at later time. So it's possible that not all foams were cut to same lengths, which contribute to different delta in sound... just saying...
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