CES Enclosed Speakers CUI Devices CES Enclosed Speakers simplify the design process by eliminating the need to create an enclosure to house a speaker. These speakers are offered in a variety of shapes, including oval, rectangular, round, and square. Speaker lengths range from 20mm to 87.9mm and widths from 13mm to 59.29mm. Choices of cone material include cloth, paper, paper and cloth, mylar, foam, polyetheretherketone (PEEK), polyetherimide, polyethylene naphthalate, polyethylene terephthalate, and polyurethane-aluminum. CUI Devices CES Enclosed Speakers come in free-hanging or panel-mount versions. Sound pressure levels range from 89db to 107db with impedance ranging from 4Ω to 9.6Ω. These components are RoHS compliant.