Designed with one goal in mind, to be loud, these subwoofers offer extreme performance in an economical package. Allow MTX to introduce you to the world of rip-roaring, affordable bass. Larger Voice Coil The Road Thunder: One Loud and Hard Hitting Sub. The sealed enclosure MTX highlights on their spec sheet is a 0.75 cu/ft enclosure, ... We measure every product and part down to the 1/1,000th of an inch. Smart looks and smarter sound — that's the story of the MTX Thunder6000 series T6104A 10" subwoofer. 10" 250W RMS, Single Voice Coil, 4 Ohm Car Audio Subwoofer. The Thunder4500 Series subs have been designed to deliver lots of low-frequency firepower without scorching a hole in your wallet. The T4510-04 10" subwoofer throws down hardcore bass with a carbon-filled polypropylene cone supported by a treated foam surround. Road Thunder subwoofers are the continued evolution of high performance subwoofers from MTX.