The Phoenix Gold Z57CX is a 5×7 inch 2-way coaxial speaker system rated at 35 watts RMS and 140 watts peak with a frequency response of 35Hz to 24kHz. It features a ferrofluid cooled PEI tweeter, a polypropylene coated cone with butyl rubber surround, and a powder-coated anti-resonance steel basket with a built-in crossover network.

Designed for vehicles with 5×7 inch speaker openings, the Z57CX includes a removable protective grate and a low installation depth suitable for mounting behind door skirts or in rear decks. The speakers use standard two-wire speaker connections and are intended as a factory replacement or sound upgrade at modest power levels.