The Mobile Monitor Series by Polk Audio uses high quality materials and the newest loudspeaker technology to bring the listener an unforgettable experience. The MM Series speakers get put through the ASTM marine testing to become marine certified. The speakers go through two harsh tests: the B117-03 Standard Practice for Operating Salt Spray (Fog) Apparatus and the D4329-99 Standard Practice for Fluorescent UV Exposure of Plastics. These speaker feature honeycomb-textured woven glass fiber composite woofer cones that resist and suppress unwanted resonances yet respond very quickly for a crisp and powerful sound.

General Features

• 6-1/2 inch Car audio 2-way Ultra Marine speakers (Pair)
• Model: MM651UM Ultra Marine MM series
• RMS: 200 watts per pair / 100 watts each
• Peak: 400 watts per pair / 200 watts each
• Frequency response: 40 - 25000 Hz
• Impedance: 4-ohms
• Sensitivity: 92 dB
• 1-3/8" (30mm) Large diameter voice coil
• Neodymium magnet structure
• Stainless steel heavy duty input terminals and mounting hardware
• Salt, fog and UV Resistant
• Woven glass composite cone woofer
• Butyl rubber surround
• 1" Soft dome weather resistant dynamic balance tweeter
• Completely sealed speakers for marine use
• Built-on grille
• Sealed crossover assembly is built into the back of the magnet
• Klippel distortion analyzer
• Top mount depth: 2-5/8"
• Cutout Dimensions: 5-1/16 x 5-1/16
• Bottom-mount Depth : 2-7/8"