Pre-loaded subwoofer Kenwood KSC-W1200B 300 W, 30 cm polypropylene driver, 4 Ω, enclosed 38–300 Hz, black

The Kenwood KSC-W1200B is a pre-loaded passive subwoofer engineered for in-vehicle use, offering a rated 300 W RMS output and a polypropylene diaphragm designed to reproduce low frequencies with clarity. Its compact enclosure, measuring 486 mm in width, 272 mm in depth and 342 mm in height, allows integration into many car interiors without occupying excessive space while delivering enhanced bass performance for music playback.

Advantages

This passive subwoofer provides a defined low-frequency response thanks to the polypropylene cone, which balances stiffness and damping for reduced distortion. The sealed pre-loaded enclosure is optimized for installation ease and consistent acoustic performance. With a 300 W RMS power rating, the unit is compatible with a wide range of external amplifiers and can reproduce impactful bass while maintaining control over transient detail.

Suitable for

• Car audio systems where a compact, powerful subwoofer is required
• Installations with limited trunk or cabin space
• Music genres that rely on strong low-frequency content (electronic, hip-hop, rock)
• Upgrading factory sound systems to achieve deeper bass

Key specifications

• Output power: 300 W RMS
• Driver cone material: polypropylene diaphragm
• Enclosure type: pre-loaded (sealed) subwoofer box
• Dimensions (W x D x H): 486 mm x 272 mm x 342 mm
• Speaker configuration: single passive subwoofer unit

How to use

Connect the Kenwood KSC-W1200B to a compatible external amplifier using appropriate gauge speaker wire and ensure the amplifier's output matches the subwoofer's power handling. Place the pre-loaded enclosure in a stable position in the vehicle—commonly the trunk or cargo area—securing it to prevent movement. Adjust the amplifier's low-pass filter, phase and gain settings to integrate the subwoofer smoothly with the rest of the car's speakers, and perform listening tests at moderate volume to fine-tune crossover points and level for balanced bass reproduction.

Usage recommendations

Use a dedicated amplifier with stable power delivery near the 300 W RMS rating for optimal performance, and select speaker wiring of sufficient thickness to minimize voltage drop. Verify secure mounting to avoid rattles and maintain trunk access clearance. Periodically check speaker connections and enclosure condition to preserve sound quality and system reliability.