On Sale Compare Quick view Massive Audio ECO12S4 - 12" 250w ECO Series Subwoofer by Massive Audio® MSRP: $65.99 1800woofers Price Now: $59.99 Was: $74.99 “Big Bass at a Price that Knocks Out the Competition” It’s all about the balance between economics & performance with the “ECO124S” subwoofer series from Massive Audio. ECO rolls in at 500W Max. It is CEA 2031 compliant... ECO12S4 MSRP: $65.99 1800woofers Price Now: $59.99 Was: $74.99 Compare Quick view