Vintage EMINENCE 18″ 18456 4ohm Cast Woofer Speaker Driver TESTED
Key Specifications (Sigma Pro 18-4 / 18456 4Ω variant). • Magnet: Ferrite, ~120 oz (heavy ceramic magnet for strong motor strength). • BL: ~16.5 T·m. • Mms: ~121 g. • Qts: ~0.29. • Vas: ~361 liters (12.74 cu.ft.).