Time Lens Technology-The acoustic centers of the tweeter and mid-bass driver are located in the same plane for superior imaging;TL1 Satellite Aperiodic-Tuned Rear Port enables better blending with a subwoofer;2 1/2 Long-Throw Drivers With Dynamic Balance Driver Technology;1/2 Silk Dome Tweeters for crisp, clear imaging and smooth response that's never tiring.;Combination Keyhole Slot & 1/4 x 20 Threaded Insert fits all aftermarket ceiling and wall brackets for ultimate flexibility