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Amazon.com: Polk Audio CS1 Series II Center Channel Speaker | Unique Design | Stand Alone or a Complement to Monitor 40, 60, and 70 Speakers | Detachable Grille | Black : Electronics
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Amazon.com: Polk Audio Reserve Series R400 Large Center Channel Loudspeaker, 1" Pinnacle Ring Tweeter & Dual 4" Turbine Cone Woofers, Hi-Res Certified, Dolby Atmos & IMAX Enhanced, Wall Mountable, Black : Electronics
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