Polk Audio Monitor XT30 Center Channel Speaker Midnight Black Monitor XT30 - Best Buy
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Polk S30 Center Speaker Review | Audio Science Review (ASR) Forum
Polk S35 American HiFi Home Theater Slim Center Speaker - Black/Walnut - Polk Polk-S35
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CS1 Monitor Series II Center Channel Speakers | Polk Audio
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Polk Audio ES35 Center Channel Loudspeaker - 300366-14-00-005
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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
Monitor XT30 Center Channel Speaker | Polk Audio
Reserve R350 - Premium slim Center Channel Speaker | Polk - US