Polk Signature Speakers: S30 Center $130, S35 Center $160, S55 Floor $160, S60 Floor $200 + free s/h By admin | August 20, 2019 10:52 am EST 0 Comment Polk Signature Speakers: S30 $130 $35 $160 S55 $160 S60 $200 + free s/hsingle as individual speakers.