Product Review

The Premium Upgrade
Tuned for the total sonic accuracy you get in a studio monitor speaker, the MM1 Series reconfigures this high-quality sound for an on-the-go experience that's way beyond anything you'll hear in an OEM factory setup.
Engineered for High-Performance Sound
Every element of the MM Series is meticulously engineered for high-performance sound-Dynamic Balance technology, pivoting 1" terylene tweeter, lightweight neodymium motor structure, high-temp Conex spiders and oversized voice coils for increased
power handling.
Ultra-Marine Certified
Featuring an IP56 rating that includes a non-corrosive fiberglass reinforced ABS basket, epoxy coated crossovers, water-proof inner and outer surrounds, weep holes for proper drainage and titanium-plated cones, you get extra, long-lasting protection- that's all salt-fog and UV tested.
Dynamic Balance Technology
Patented process that guides material selection through rigorous testing that identifies and cancels out unwanted resonant frequencies. 
Included:
Two 5.25" coaxial speakers
2 grilles
Mounting hardware
Wiring harness

Features:

2) Polk Audio MM522 5.25" 600 Watt Car Audio Marine/ATV/Motorcycle/Boat Speakers
Driver Compliment: 5.25" (133.35 mm)
Tweeter Complement: 1" (25mm)
Cutout Dimensions: 4.61" (117mm)
Mounting Height: 0.20" (5.07mm)
Mounting Depth (Top): 2.37" (60.1mm)
Mounting Depth (Bottom): 2.57" (65.2mm)
Peak Power Handling: 300 Watts per speaker
Continuous Power Handling: 100 Watts per speaker
Nominal Impedance: 4 Ohms
Grille Height: 0.92" (23.3mm)
Frequency Response: 50Hz-40kHz
Sensitivity: 92 dB
Magnet Weight: 0.8/0.31 oz
Magnet Material: Neodymium
Magnet Size: 24.7mm x 5mm x 10/24.5mm x 5mm x 4mm
VC Diameter: 1"