Polk Ultramarine UMS108W

Great looks, great sound

Polk's marine subwoofers have always been known for intelligent design, impressive sound, and weather resistance. Their UMS108 sub continues this tradition with solid construction that stands up to the elements, and RGB LED lighting so your system looks as good as it sounds.

Rugged components 

The UMS108 is made to kick out deep bass under challenging conditions. Its mica-reinforced polypropylene cone handles up to 350 watts RMS, and the stiffness of the cast aluminum basket gives you the clean, hard-hitting performance you expect from Polk. This sub's air-suspension design makes it suitable for installation in any panel of your boat without the need for an enclosure. And with ASTM certifications for salt-spray and UV exposure, it'll stand up to life on the water.

Light up the night

This sub features RGB LED lighting installed in the sub's grille to give you visual appeal to match the musical intensity. With Polk's XKGlow lighting controller (sold separately) you can program the lights for a custom display; the sub's lighting can also be controlled from your smartphone using Polk's free phone app. 

To drive this single subwoofer, we recommend a mono amplifier rated between 275 and 600 watts RMS at 4 ohms. For more information, please refer to our article on How to Match Subwoofers and Amplifiers.