02-16-2010, 08:18 PM
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#1 (permalink)
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Quote:
Originally Posted by spearfish25
My understanding is that the 18" is quieter, so people probably tolerate volume addition of the HFCs better. I'm sure Tony can comment for you though.
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Lower frequency sound has longer wave lengths. In basic logic the idea of the 18" is to reduce lower frequency noise than the 12". "Quieter" is simply a vague term based on how we hear. Reducing a lower frequency noise source may not sound quieter because our hearing is more sensitive to higher frequency noise.
Saying all that above.... I have the FI resonated test pipes with the 18" CF resonators and really like the sound. 
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