That WickedCAS enclosure is a tad big for the 10w3 so I would not use Polyfill. Instead, the box volume could be reduced by .1 ft3 to give the sub what it wants. For the W6 however it is perfect, and Polyfill won't hurt. The W6 would sound very tame and blend effortlessly with the front stage. The W3 will sound louder and more in your face than the W6.
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Mobridge DA2 > JBL MS-8 > ARC XDi 600/4 > JBL Gti 408 Mids & Vifa OT19 Tweeters; PG Ti2 1600.5 > Morel HCW-10 & IDMax 15
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