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HiFonics - CX12D2 Subwoofer
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Hifonics HFX12D4 Review: Running on a 250W RMS Directed 250d Amp - YouTube
Hifonics HFX12D4BK 400W RMS HFX Series 12" Dual 4-Ohm Car Subwoofer
Hifonics HFX12D4BK 400W RMS HFX Series 12" Dual 4-Ohm Car Subwoofer
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Car Stereo Package with Hifonics HFi1000D Amplifier and Two HFi12D4 Car Subwoofers Driver (Review) – Woofer and Bass Test
