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Amazon.com: Hifonics 4 Channel Car Amplifier – Class A/B Gemini Series Multichannel Amplifier 1400 Watt, Car Electronics Audio Subwoofer 2 Ohm Stable Bass Boost MOSFET Power Supply for Speakers Sub Amp : Electronics
Amazon.com: Hifonics Monoblock Car Amplifier – Gemini Series Class D Amplifier 2500 Watt, Car Electronics Audio Subwoofer Bass Boost 1 Ohm Stable MOSFET Power Supply for Car Speakers Mono Sub Amp : Electronics