M7-12'' white classic style marine speaker M7 12-inch marine speaker for infinite use (175 W, 4 Ω) with a classic gloss white grille, proper system configuration, adding a speaker frees your small main speakers from the burden of reproducing low frequencies. This allows your whole system to play louder and sound clearer at all listening levels. Specially designed and built for real marine work, the M7 infinite baffle subwoofers are designed to work without a dedicated enclosure and are intended for moderate power applications. The M7-12 is best used with amplifier power in the range of 50W to 175W and is optimised to operate with a large volume of air behind it (at least 2 cu ft / 56.6 l). If you need a subwoofer that operates in a small sealed enclosure, select our M6-10W instead. Like all JL Audio marine speakers, this speaker is designed to withstand a real saltwater marine environment and provide years of listening pleasure. Production of this model takes place at the JL Audio factory in Miramar, Florida, using worldwide materials and components.