Pyle Active Down Firing Subwoofer - 10 Inches, Ported Design with High-to-Low Input Level Controller, Invisible Down-Firing Speaker, Color Black, Built-in Convenience - PSUB10A - Walmart.com
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Sub-Woofer Controller
Subwoofer Controller
PSB-200 Subwoofer Amplifier with Crossover / Phase Control - 200W – Soundavo
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