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Polk Audio TL350 Blackstone Series 5.0 Speaker System (Black)

Time Lens technology-The acoustic centers of the tweeter and mid-bass driver are located in the same plane for superior imaging while the acoustic lens incorporated in the grille smoothes the tweeters frequency response The TL Series creates imaging and frequency balance previously impossible in small high performance satellite speakers
TL3 satellite aperiodic-tuned rear port enables better blending with a subwoofer This design combines the bass extension of an acoustic suspension enclosure with the mid-bass boost of a ported enclosure by controlling airflow through the port for better extension without distortion
TL3 center channel tuned rear port maximizes the low-end response of the dual driver design for superior blending with the satellites and the subwoofer
Curved enclosure design employs non-parallel surfaces that not only lead to a stronger more rigid and acoustically inert enclosure but they also result in less audible coloration from internal surface resonances