Adorama offers a pair of Polk Audio Atrium 4 Indoor/Outdoor Speakers in Black, model no. AM4085-A|4, or White, model no. AM4088-A, for $89.99. This $20 mail-in rebate drops that to $69.99. With free shipping, that's tied with our November mention and the lowest total price we could find today by $31. Each features a 4.5" woofer, 0.75" tweeter, 75Hz to 25kHz frequency response, and 180-degree Speed-Lock mounting system. Rebate expires January 31.