Pioneer Pro Audio XY-218S Dual 18-Inch Bass Reflex Subwoofer, Black - AVLgear.com
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Martin Audio SXP218, High-performance 2x 18" Powered Subwoofer System
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Rea Sound-Audio - Martin Audio Torus T1230 with SXC118 Cardioid Sub 18 forward 14” rear System powered with 1 Ikon IK42-Dante 20K DSP Amplifier superb for 15 to 30m throw for pricing
Martin Audio SX218 2x 18" High-Performance Subwoofer System | Full Compass Systems