Polk Audio DB521 5-1/4 Inch 2-way Speakers

Features:

• 5-1/4 Inch 2-way Speakers (Marine Certified)
• Power Handling:
  • Peak: 275 watts per pair / 135 watts each
  • RMS: 90 watts per pair / 45 watts each
• Impedance: 4 ohms
• Dynamic Balance polymer/mica composite mineral filled cone is stiff yet lightweight for big sound and little distortion
• 19mm liquid-cooled silk/polymer composite dome tweeter with neodymium magnet for clear and detailed highs
• Low-mass 2-Layer 25mm Kapton voice coil former is lightweight for high sound output
• Multi-hole mounting pattern and shallow depth for easy drop-in installations in most cars
• ABS Grilles, computer optimized and based on exclusive MOMO designs
• Durable butyl rubber surround won’t fall apart under the stress of extreme temperatures, sunlight or time
• Pole Plate Heat Sink promotes better heat dissipation for superior power handling and reliability
• Acoustically inert stamped steel basket
• Flat Spider for faster, longer excursion linear motion
• Flexible woven tinsel leads sewn directly into Spider for greater reliability
• Frequency Response: 60-22,000 Hz

Specifications:

• Series: db (Polk)
• Priced Per: Pair
• Speaker Size: 5-1/4 Inch
• Design: 2-way
• Tweeter Design: Dome
• Tweeter Composition: Silk
• Woofer Composition: Polymer/Mica Composite
• Woofer Surround: Butyl Rubber
• Peak Power Handling: 135 watts
• RMS Power Handling: 45 watts
• Sensitivity: 93 dB
• Frequency Response: 60 - 22000 Hz
• Impedance (Per Voice Coil): 4 ohms
• Shallow Mount Installation: Yes
• Top-Mount Depth: 2-5/16 Inch
• Bottom-Mount Depth: 2-7/16 Inch
• Cutout Dimensions: 4-11/16 x 4-11/16
• Speaker Grilles: Yes