Check the listing for details. Atlas IED PD30T High Efficiency 30-Watt Compression Driver with Transformer. Condition: New. Listed at 139.99 USD. A 30W, fully environment-resistant driver for indoor/outdoor applications. With a power rating of 30W, the PD-30AT is a fully environment-resistant compression driver recommended for use in expansive and/or high ambient sound-level areas. Unit boasts a plane wave frequency response of 300Hz-3.9kHz. The PD-30AT incorporates the exclusive Vari-Tap Control/Connect Center with a screwdriver-selectable ohms/watts switch. The integral 70V line-matching transformer is varnish-impregnated for maximum environment resistance and life expectancy. Also includes a protective terminal cover with built-in strain relief to assure secure cable connections. The PD-30AT is terminated in standard 1 3/8"-18" thread male couplings for use with screw-on horns.Features30W power ratingEnvironment-resistant construction for indoor/outdoor useExtended frequency response range for optimum intelligibilityOutstanding reproduction of music, signaling and PA systemsBX-1A Conduit Adapter compatibleSpecificationsPower Rating: 30WPlane Wave Freq. Response: 300-3,900HzLow Freq. Limit @ Full Power: 500 HzSound Level: 113.6 (avg), 300-3,900 HzImpedance: 45, 89, 167, 333, 666, 1300, 2500Power Taps: 70.7V @ 1.8, 3.7, 7.5, 15, 30Voice Coil: 1.5"Dimensions: 4.5" H x 4.5" Dia.Weight: 4.75 lbs