Polk’s MagniFi 2 soundbar with 3D audio is 40% off for Prime Day

Want your TV audio to sound like it’s coming from everywhere? That’s the idea behind the 3D audio mode of Polk Audio’s MagniFi 2 soundbar, which is selling for a steep 40-percent discount during Amazon’s Prime Day event. On sale now for $299.99, down an eye-popping $200 from its usual $499 sticker price, the Polk