Polk Signature Elite ES90

Details Add-on speakers for 3D sound This pair of add-on speaker modules lets you experience a "height" dimension with your home theater setup when paired with a compatible receiver and matching Polk speakers. The ES90s sit securely on top of your Signature Elite ES55 or ES60 floor-standing speakers or ES20 bookshelf models. They'll connect to the height channels of a Dolby Atmos home theater receiver and help your system re-create realistic, three-dimensional effects that envelop your listening position.