Hi-Fi SOUND WITH BROAD COVERAGE & DEEP BASS even at low frequencies. Powered by Dynamic Balance & Polk's patented Power Port technology, the 70-RT in ceiling speakers feature a 2.5" Midrange driver, 7" Subwoofer & a 0.75" Dome Tweeter Designed to offset reflective surfaces with no sound distortions, this 3-way driver array in these Polk Audio speakers produces BIG, FULL-RANGE PERFORMANCE FROM A DECEPTIVELY SMALL IN-CEILING SPEAKER. Total Frequency Response- 34 Hz → 27,000 Hz EASY TO MOUNT AND INSTALL - PERFECT FIT TEMPLATES, a precision flange, (available) pre-construction brackets and the PATENTED ROTATING CAM system ensure secure, vibration-free installation for the home theater speakers This in-ceiling loudspeaker VANISHES INTO THE CEILING giving you a clean look, becoming the CENTER STAGE OF ROOM-FILLING SOUND. Paint the wafer-thin sheer grille on the home stereo speakers any color and it EASILY BLENDS INTO YOUR HOME DECOR Polk’s UNWAVERING COMMITMENT, RELIABILITY, AND CRAFTSMANSHIP has made it one of the most trusted names in home audio & home speakers. Bring out the best in surround sound systems & acoustic excellence, so you can SIT BACK AND RELAX