Infinity Reference REF407F 4" Coaxial Speakers 2001-3000 a 1" voice coil on

a 1" voice coil on a Kapton former

Crossover type: Variable Electronic

and protective features simplify installation and tuning

low-resistance speaker wiring for high-current bass signals

Operating Parameters: 9–16 VDC operating range

Infinity Reference REF407F 4" Coaxial Speakers 2001-3000 a 1" voice coil onInfinity Reference REF407F 4" 2 way car speakers are a high efficiency upgrade designed to fit behind factory grilles or panels in most applications, delivering punchy midbass and smooth highs. They perform best when powered by an external amplifier but remain compatible with factory or aftermarket stereos. Plus One+ polypropylene woofer cone: Oversized cone with a hi roll rubber surround moves more air for louder, more impactful bass from a compact