Sony XS-MP1611 6.5 in (16 cm) Dual-Cone Marine Speaker Enjoy powerful sound with 40 W power handling 6.5 in (16. 5 cm) dual cone design Hear rich bass and clear vocals with a rigid woofer cone structure IPx5 certified for marine use Hear soaring highs and resounding lows with a wide 45–20000Hz frequency range.