MTX Audio introduces a clever mix of leading-edge technology designed to play deep, low bass in a variety of enclosures: sealed, vented or bandpass. The redesigned Thunder6000 series features Spider Plateau Venting for cooler voice coil operation and greater reliability during heavy bass passages. Instead of pushing and pulling super-heated air over the voice coil like conventional, rear vented subwoofers, Thunder6000s shed the heat out the sides of the spider. The result is cooler operation during all-night crank-it-up bass sessions. Asymmetrical Linear Drive (ALD) technology, used on all MTX Audio Thunder subs, provides high output with low distortion, thanks to flat progressive spiders and extended pole pieces. Thunder6000 subs have rugged folded-window steel baskets, 2" high temp, 4-layer voice coils, and Apical voice coil formers. Also new for this year are aluminum deposited cones and tinsel pads for superior connection.