Editor’s Pick Polk Audio Boat Subwoofer Speaker UMS108B | 10.8 Inch Black Silver

Boat part number 1089166 is a new Ultramarine 10.8″ subwoofer from Polk Audio, part number UMS108B .

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.

Manufacturer calls this a 10.8″ subwoofer, we measure it to be approximately 10 1/2″ OD x 6 3/4″ D overall. It requires an approximate 8 1/4″ OD x 5 5/8″ D cutout and has (6) 1/4″ Dia. countersunk holes (hardware not included). It has a tinsel lead connection.

Sold as a single.

Specifications:

• Part Manufacturer: Polk Audio
• Part Number: UMS108B
• Material: Mica-Reinforced Polypropylene / Rubber / Cast Aluminum
• Color: Black / Silver
• Finish: Matte
• Impedance: 4-Ohm
• Sensitivity: 89.2 dB
• Power Handling: 350 watts RMS
• Peak Power Handling: 700 watts
• Frequency Response: 28-2000 Hz
• Manufacturer Dimension: 10.8″
• Overall Dimensions: 10 1/2″ OD x 6 3/4″ D
• Cutout: 8 1/4″ OD x 5 5/8″ D
• Mounts: (6) 1/4″ Dia. Holes
• Connection: Tinsel Lead