EFX Competition Loudspeakers are designed to elevate sound quality, performance, durability and installation flexibility to a new level. The EFX C65 and C692 both feature 12dB, 2-way integrated crossovers so you no longer have to search for a location to mount your crossover cases. The C65 convertible component set can be mounted in either a coaxial or component alignment with it's separate tweeter for ideal positioning. The C65 loudspeaker set also includes our patent pending Universal Backmount Adapter for quick, secure and easy tweeter mounting behind factory panels or A-pillars.