Spyn SPY-18SUB Active Subwoofer - 18" SPY-18SUB 18” Active Subwoofer Box The SPY-18SUB is a high-powered 18” active subwoofer designed to deliver deep, punchy low-end for professional sound reinforcement. Built into a rugged 13-ply plywood enclosure, it’s engineered for... MSRP: Was: Now: $198,998.30 Add to Cart