Theia Center Channel Speaker

PMT is a proprietary Earthquake technology that enhances acoustical output while keeping a minimal footprint. The 4-inch wideband woofers are manufactured using the Piston-Max Technology. Piston-Max moves the speaker surround to the outer edge of the cone body, resulting in a 20 percent increase in surface area. This translates into more sound and higher efficiency.

The patented Earthquake technology dramatically increases sub-harmonic frequency response and dynamic output capability. In the Theia, the quad 4-inch XLT wideband Kevlar cone woofers are pneumatically coupled to a bottom-mounted 10-inch SLAPS capable of 2-inch peak-to-peak travel, enabling battlefield-level effects to be reproduced effortlessly.

AASD combines higher acoustic efficiency with controlled dispersion, ensuring uniform coverage over a wider area. Building on the lessons learned from sizeable professional line array speaker systems, AASD uses positive interference and physical curvature to create a wide, fully saturated sweet spot, allowing for better HT utilization than traditional center speakers while minimizing energy waste in the vertical or off-axis plane.

Earthquake originally developed XLT woofer geometry for heavy-duty industrial subwoofers to expand excursion potential over regular long-throw woofers. XLT and PMT work in great synergy as each technology expands on one of the two parameters for sound generation—bore and Stroke. The level of sound possible is determined largely by Bore x Stroke. Ask any car buff, and they will say there is no replacement for displacement.