Upgraded Opti Pro 6.5” High Power Midbass - Powerful 500 Watt Peak 105Hz – 12 Khz Frequency Response 30 Oz Magnet Structure 4 Ohm W/Paper Cone and Foam Surround Full Range Speaker - OPTI6MI. Mid-Bass sound drive unit provides the sub speaker with impressive bass response and low-resonance frequency output.
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