Monolith by Monoprice 13" THX Certified Ultra 2000-Watt Powered Subwoofer (Open Box) $585

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https://www.monoprice.com/product?c...51853&PID=4485850&ref=cj&utm_source=cj&utm_me
Monolith by Monoprice 13" THX Certified Ultra 2000-Watt Powered Subwoofer (Open Box, 44579) on sale for $584.99 when you apply code TREAT15 in the cart. Shipping is free.