Features of W15K5S4:

• Rockville W15K5S4 K5 Series 15" 4-Ohm Car Subwoofer
• Peak Power Handling: 2000 Watts
• Program Power Handling: 1000 Watts
• CEA Rated RMS Power Handling: 500 Watts
• 2.5" 4-Layer Black Aluminum Voice Coils Wound with OFC (100% Copper) Wire
• The wire we use to wind the voice coil is imported from Japan which is way better quality than the standard China wire
• 60 Oz High Quality Magnet
• Cast Iron Basket With Black Sanded Finish
• Fiber Reinforced Ultra Stiff Black Non-Pressed Paper Cone ? This cone is very efficient which makes the speaker sound louder even without requiring a lot of power to push it
• Thick Foam Surround Provides Incredible Sound Quality With Minimal Distortion
• Blue Stitching Cone Reinforcement Ensures Long Life
• Paper Dust cap is light weight and efficient helping the sub to play louder even if your amp is not so powerful
• Chrome-Plated Binding Post Terminals - These are the best terminals on the market and they accept any gauge wire
• Impedance: Single 4-Ohm Voice Coils
• Vented Hole on T-yoke Enhances Heat Dissipation
• Rubber Boot Magnet Covers Make the Woofer Look Nice and Protects the Magnet
• Mounting Gasket with Rockville branding looks great and Makes it Easy To Mount the Subwoofer Air-Tight
• High BL Magnetic Motor Gap
• We use the highest grade black glue that handles extremely high temperatures which allows our woofer to handle even more power than they are rated
• Cutout Diameter: 13.85 inches
• Mounting Depth: 5.98 inches
• Frequency Response: 28.6 Hz - 1.0K kHz
• 6mm T-Yoke + 8 mm Washer
• Sensitivity: 90.1dB
• Sealed Enclosure Volume:1.5 ? 2.5 Cubic Feet
• Vented/Ported Enclosure Volume: 2.0 ? 3.5 Cubic Feet
• Weight: 13.4 Lbs.
• Shipping Weight: 15.4 Lbs.
• Shipping Box Dimensions: 16.53x 16.53 x 9.76 Inches

Detailed Info of W15K5S4:

• Body: Non-Pressed Paper
• Gap Plate Inside Diameter: 85mm (3.34 inches)
• Gap Plate Outside Diameter: 170mm (6.69 inches)
• Gap Plate Thickness: 25mm (0.98 inches)
• Yoke Outside Diameter: 156mm (6.14 inches)
• Yoke Thickness: 6mm (0.23 inches)
• Yoke Pole Diameter: 60mm (2.4 inches)

Features of RD15:

• Rockville RD15 Dual 15" Sealed Subwoofer Enclosure
• Proudly Made In The USA, Using Only The Finest Quality Materials - For The Best Level of Performance From Your Subs!
• 3/4" USA Heavy Duty MDF Construction
• Machine precision cut mounting holes
• Top of the line Glue for extra durable adhesion
• Designed, tested, and engineered to work with most of today’s popular woofers. These enclosures are built with the quality additives needed to maximize the performance of any sound system.

Enclosure Measurements of RD15:

• Type of Enclosure: Sealed
• Enclosure Sub Size: Dual 15"
• Dimensions in Inches: 16.75" L x 36" W x 16.25 H"
• Top and Bottom Depth: 16.75"
• Mounting Depth: up to 15.5" (enough depth for any sub on the market)
• Gross Volume Per Sub (Measurement for the outer dimensions of the box): 2.7 Cubic Feet
• Net Volume Per Sub (Measurement for the outer dimensions of the box less the thickness of the wood): 2.1 Cubic Feet

Includes K2:

• 20 Drywall Wood Screws (Wood screws are the type of screws; the screws are actually made of metal)
• 20 Feet of 14 AWG Blue Speaker Wire
• 4 Spade Terminals