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Rockford Fosgate R2-500X1 Prime 500 Watt Mono Amplifier R2500X1 - NO BASS KNOB

Rockford Fosgate Prime R2-300X4 300 Watt 4-Channel Amplifier R2300X4

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Rockford Fosgate R250X4 250W 4 Channel Amplifier

RFRB Rockford Fosgate R2-300X4 Prime Series 300 Watt 4-Channel Car Amplifier