Mounted Outer Diameter: 93.5mm Frequency Range: 120hz~20khz Impedance: 4ohm Watts: 70 Watt Magnet Ferrite: 4oz Woofer Material Polypropylene Cone IP Rating: IP66 UV Stable: Yes Pre-wired with 6.5ft / 1.98m of cable. The Cortex External Speaker is designed for the marine environment with an IP66 ingress protection the speaker is suitable for mounting almost anywhere on board. Compact in size the speaker features a durable and UV stable polymer housing. Rated at 70W max power output (35W RMS) with a frequency response of 120Hz-20 000Hz to deliver a full clear sound for Cortex VHF voice and unique annunciated alarms. Surface Mount through using a 74.5mm (2 15/16") diameter hole and requiring a minimum mounting depth of 56mm (2 1/4"). html-body [data-pb-style="63907256EFC13"]{justify-content: flex-start; display: flex; flex-direction: column; background-position: left top; background-size: cover; background-repeat: no-repeat; background-attachment: scroll; border-style: none; border-width: 1px; border-radius: 0px; margin: 0px 0px 10px; padding: 10px;} html-body [data-pb-style="63907256EFC1D"]{border-style: none; border-width: 1px; border-radius: 0px; margin: 0px; padding: 0px;}