Pioneer TS-300D4 12" 30cm 1400 Watts Dual Voice Coil Car Sub SubwooferPioneer TS 300D4 12" 30cm 1400 Watts Dual Voice Coil Car Sub Subwoofer Champion Series Pioneer Subwoofers are solid and compact, and can withstand heavy use at high volumes without compromising sound quality. With dual spiders and engine mounting as the driving force, they can create a deep, dynamic sound that lives up to the name of the champion series. These models also feature a unique Pioneer dust control concept to keep dust from degrading and