In addition, the Zxi 63 is a three-way speaker, versus the two-way 52C. The ZXi 63 also features a 12mm Neodymium silk dome multi-mount swivel-enabled tweeter, weather resistant butyl rubber surrounds, and low-profile anti-resonant MaxxFitt titanium-chromed speaker frames. Priced at $48.99, the Hifonics Zeus ZXi 63 is exactly $4 more expensive than its slightly weaker counterpart, the ZXi 52C.