Full range, bass reflex box speakers offer top quality sound.Full size box speakers with a two-way vented post design offer full range response. The low magnetic field design lets you mount them anywhere. Polycarbonate gimbal mounting brackets are included. The 5 1/4" polypropylene main cones provide maximum power of 100 watts per speaker. Sold in pairs.Magnetically shielded: The ultra-low magnetic field design lets you mount them anywhere without adversely affecting navigation equipment such as compasses and autopilots.Waterproof: Polypropylene cones, stainless steel grills and brackets, and heavy-duty ABS enclosures make them corrosion-proof and waterproof. Gimbal mount bracket included.Key FeaturesFrequency Response: 55Hz to 20KHz (2 way)Peak Power: 100 watts per speakerImpedance: 4 ohmsOverall Dimensions:9 1/16" x 6 1/16" 5 5/8" (230mm x 153mm x 143mm)Weight: 4.80 lbs per SpeakerCone Size: 5 1/4" (133mm)Continuous Power: 60 W RMS/speakerSPL: 86dB