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Message: <blockquote data-quote="mrj858" data-source="post: 8717037" data-attributes="member: 634131">I’ve run both surrounds on the same subs with only difference being surround difference....the “fat” surrounds don’t tighten up over stroke so they don’t introduce any suspension induced distortion...the “SPL” surrounds tighten up over stroke causing FS to raise causing a favorable sound in upper frequency’s  (which is suspension induced distortion) and the main reason most people think the fat surrounds aren’t loud in the upper frequencies...the only difference I experienced in testing is with the “Fat” surrounds I gained output in the lower frequency range and with the”SPL” surrounds I lost output in the lower frequency range giving the impression that I had more output in the upper frequencies</blockquote>

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