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embrace your

sophisticated madness

Your boat should reflect who you are: refined with a wild side. Polk Ultramarine is stylish, high-performance audio that takes your boat to the next level.

custom audio

for every boat

Polk DSP cancels out wind, water, and engine noises to keep your music front and center. Our DSP optimizes the audio signal to deliver only the most important sounds, ensuring a consistent volume without losing impact or letting in any unwanted noises. That means no audible hiss or interference when the volume is low and no distortion when you turn it up.

POLK® and POLK AUDIO® are registered trademarks of Polk Audio, LLC, used under license by ASA.us leo.

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Speakers & Subwoofers

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PRC200BC

  • Waterproof wired remote control
  • Daylight readable positive type LCD display
  • White backlit controls and LCD illumination
  • Removable trim ring (chrome included)
  • Corrosion and UV resistant
  • Conformal coated circuit board
  • Ignition protection certified
  • Surface mount or rear flush mount

PRC100BC

  • Waterproof wired remote control
  • Blue backlit controls
  • Removable trim ring (chrome included)
  • Corrosion and UV resistant
  • Conformal coated circuit boards
  • Ignition protection certified
  • Through-hole mount with threaded housing and knurled securing nut
  • Spin-on mounting clamp
  • 2-inch diameter mounting hole

UMPA8

  • 4 x 150 watt maximum and 450 watt maximum for subwoofer
  • 8 channels
  • Drives 8 full range speakers
  • Single channel pair bridged to drive subwoofer
  • 4 differential audio in
  • 100 dB
  • Class D design
  • Compact, white powder coated
  • High efficiency
  • OEM connectivity
  • Differential audio output
  • Black silicone end cap covers

UMPA5

  • 4 x 150 watt maximum and 450 watt maximum for subwoofer
  • 5 channels
  • Drives 4 full range speakers and 1 subwoofer
  • 3 differential audio in
  • 100 dB
  • Class D design
  • Compact, white-powder coated
  • High efficiency
  • OEM connectivity
  • Differential audio output
  • Black silicone end cap covers

UMPA4

  • 4 x 150 watt maximum power
  • 4 channels
  • Drives 4 full range speakers
  • 2 differential audio in
  • 100 dB
  • Class D design
  • Compact, white powder coated
  • High efficiency
  • OEM connectivity
  • Differential audio output
  • Black silicone end cap covers

UMPA1

  • 450 watt maximum power
  • 1 channel
  • Mono design drives two subwoofers
  • 100 dB
  • Class D design
  • Compact, white powder coated
  • High efficiency
  • OEM connectivity
  • Differential audio output
  • Black silicone end cap covers

UMS108

  • 10.8-inch waterproof subwoofer
  • Available in black (UMS108B), smoke (UMS108S), or white (UMS108W)
  • 700 watts maximum power
  • Corrosion and UV resistant
  • Air suspension
  • Cast aluminum basket
  • High temperature voice coil
  • Snap-on grille installation option
  • Silver cone
  • Insulated tinsel leads
  • Mica and polypropylene woofer
  • 70.8 oz magnet
  • 4 Ohms nominal impedance
  • 89.2 dB sensitivity
  • 20 Hz – 2KHz frequency response
  • 5.71-inch mounting depth

UMS88

  • 8.8-inch waterproof speaker
  • Available in black (UMS88B), smoke (UMS88S), or white (UMS88W)
  • 250 watts maximum power
  • Corrosion and UV resistant
  • Free air design
  • Cast aluminum basket
  • High temperature voice coil
  • Snap-n grille installation option
  • Silver cone
  • Insulated tinsel leads
  • Mica and polypropylene woofer
  • Titanium dome tweeter
  • 40.3 oz. magnet
  • 4 Ohms nominal impedance
  • 89.4 dB sensitivity
  • 50 Hz – 20KHz frequency response
  • 4.06-inch mounting depth

UMS77

  • 7.7-inch waterproof speaker
  • Available in black (UMS77B), smoke (UMS77S), or white (UMS77W)
  • 200 watts maximum power
  • Corrosion and UV resistant
  • Free air design
  • Cast aluminum basket
  • High temperature voice coil
  • Snap-on grille installation option
  • Silver cone
  • Insulated tinsel leads
  • Mica and polypropylene woofer
  • Titanium dome tweeter
  • 25.6 oz. magnet
  • 4 Ohms nominal impedance
  • 90.2 dB sensitivity
  • 70 Hz – 20 KHz frequency response
  • 3.03-inch mounting depth

UMS66

  • 6.6-inch waterproof speaker
  • Available in black (UMS66B), smoke (UMS66S), or white (UMS66W)
  • 150 watts maximum power
  • Corrosion and UV resistant
  • Free air design
  • Cast aluminum basket
  • High temperature voice coil
  • Snap-on grille installation option
  • Silver cone
  • Insulated tinsel leads
  • Mica and polypropylene woofer
  • Titanium dome tweeter
  • 12.4 oz. magnet
  • 4 Ohms nominal impedance
  • 87.5 dB sensitivity
  • 100 Hz – 20KHz frequency response
  • 2.92-inch mounting depth

UM2A

  • Waterproof two-piece modular source unit
  • 200 watts maximum power
  • App Ready – Control main functions from most Bluetooth®-enabled devices with the Polk Ultramarine App
  • Bluetooth streaming audio (A2DP) and control (AVRCP)
  • 2.8-inch daylight readable TFT display with protective glass lens
  • Low-profile flush-mount commander with detachable trim ring
  • Four-channel amplified audio
  • Four-zone volume control when used with UM2DSP
  • Digital AM/FM tuner with 30 station presets (18 FM/12AM)
  • SiriusXM radio ready with 18 SAT station presets (tuner and subscription required)
  • USB supports MP3/WMA playback
  • 12 volt DC power
  • Non-volatile memory
  • Corrosion and UV resistant
  • Preset EQ settings (user, flat, pop, classical, and rock)
  • Rear auxiliary line-level audio input (RCA)
  • Front and rear four-channel line-level audio output (RCA)
  • Wired remote control ready (PRC100BC, PRC200BC sold separately)
  • Conformal coated PCB