Defected666 42,385 views. Will not say who built recone as it had a lot of issues that are error of the builder. MTX 9500 12 Flexing my Jetta - Duration: 4:15. Genuine MTX 9500 Series 4" Subwoofer Voice Coil - D4 Ohm Brand NEW and AMERICAN MADE Fits MTX 9512, 9515 and many subs that require the specs below 4:15. Im debating on Sending my MTX 9512 for a rebuild/recone for $170 and shipping is covered if it has the original box...or should i just buy an alpine SPL Forum ... Rockford Fosgate Power T20001BD,kicker 0 gauge Wiring kit,2 Alpine Type-R's 12's,Pioneer 4-way 6x9's Realm of Excursion » Car Audio Discussion » Subwoofers: Bookmarks: Re-coning is the technique of removing all parts from the speaker frame and replacing with new parts. The Original 9500 SuperWoofer. Thunder 9500 stretches the limits of SPL while still providing truly accurate music reproduction. MTX Audio single-handedly created the biggest boom in the history of bass - Thunder 9500, the world's first SuperWoofer! Upgraded recone on an Mtx Thunder 9500 12". In the simplest of terms, it thunders a wall of sound and still sounds pure and crisp. Massive Subwoofer, Massive Ported Box (Build) Rockford Fosgate Power T3 19" Plexi Window VIDEO 1 - … We decided to offer user friendly drop in recone kits to the public. Most recone suppliers sell the kits in pieces which requires an expert to put together.