15-Inch Car Subwoofer with 500 Watts RMS Power and a 2.4-Inch Four-Layer Copper Voice Coil for Bass

This 15-inch car subwoofer brings dedicated bass reproduction to a car audio build, pairing a 500-watt RMS rating with a high narrow foam surround and pressed composite paper cone. It is an entry-level choice for listeners building their first bass system or adding a subwoofer to an existing setup.

The CT Sounds Bio 15 uses a 2.4-inch four-layer high-temperature copper voice coil and an air cooling system to help manage heat during listening. Choose the dual 2-ohm or dual 4-ohm configuration to suit your amplifier and planned wiring, then check the enclosure dimensions before installation.

Features

• 500 watts RMS and 1000 watts maximum power ratings distinguish continuous and maximum power specifications.
• Dual 2-ohm and dual 4-ohm configurations support different amplifier and wiring plans.
• A four-layer high-temperature copper voice coil and air cooling system help manage heat.
• Pressed composite paper cone and high narrow foam surround form the moving assembly.
• 12-gauge push terminals provide the speaker-wire connection.
• Sealed and ported enclosure recommendations help guide box planning.

Specifications

• Product type: Car Subwoofer
• Nominal size: 15 inches
• RMS power: 500 watts
• Maximum power: 1000 watts
• Voice coil configurations: Dual 2 ohm or dual 4 ohm
• Voice coil construction: 2.4-inch four-layer high-temperature copper
• Magnet: Single stacked Y25 ferrite
• Cone: Pressed composite paper
• Surround: High narrow foam
• Basket: Stamped steel
• Terminals: 12-gauge push terminals
• Suspension: 8.5-inch single-layer poly-cotton spider
• Mounting depth: 6.42 inches
• Cutout diameter: 13.94 inches
• Overall diameter: 15.39 inches
• Recommended flat-response sealed enclosure: 1.5 cubic feet
• Recommended flat-response ported enclosure: 2.5 cubic feet; 28 Hz tuning; 24 square inches of port area
• Recommended maximum-loudness ported enclosure: 4 cubic feet; 28 Hz tuning; 64 square inches of port area
• Enclosure volume allowance: Recommendations exclude subwoofer, bracing and port displacement

Frequently Asked Questions

Should I choose the dual 2-ohm or dual 4-ohm subwoofer?

Choose the Bio 15 configuration that matches your amplifier's supported load and your planned voice-coil wiring. Both configurations have a 500-watt RMS rating; the coil impedance is the key selection difference.

How much mounting space does this 15-inch subwoofer need?

The Bio 15 requires a 13.94-inch cutout and has a mounting depth of 6.42 inches. Its overall diameter is 15.39 inches, so check both the opening and surrounding clearance before choosing an enclosure.

Can I use this subwoofer in a sealed or ported box?

The Bio 15 has recommendations for both sealed and ported enclosures. For the flat-response design, use 1.5 cubic feet sealed or 2.5 cubic feet ported, with the ported design tuned to 28 Hz and using 24 square inches of port area. Allow separately for subwoofer, bracing and port displacement.

Is 1000 watts the continuous power rating?

No. The Bio 15 is rated at 500 watts RMS, while 1000 watts is its maximum power rating. Use the RMS rating alongside your selected coil configuration and final wired load when planning amplifier matching.