Performance SeriesPerformance Box MA840Ideal speaker to position on locations in which no other speaker will fit, Speakers feature low magnetic field with stainless steel grill and bracket, Coated internal wiring for long life Stainless Steel Grille stands up to harsh marine effects polypropylene cones Heavy Duty ABS Plastic frames Compact bracket mount will fit almost anywhere Specifications (per speaker):Max RMS Power: 20 WattsMax Peak Power: 40 WattsMain Cone Size: 3""Configuration: Dual ConeProduct : POLY-PLANAR MA840 (B) SUB COMPACT BOX SPEAKER 80 WAT Manufacturer : POLYPLANAR Manufacturer Part No : MA840B UPC : 731128084015 SKU: CW16123