Alpine F4

Best guide Alpine PDX-F4 4/3/2 Power Density Digital Amplifier 4-Channel Power Density Digital Amplifier, 4 ohms: 100 watts x 4 chan, 2 ohms: 100 watts x 4 chan, Total RMS: 400 watts, Class-D amplifier design, Blue LED power/status indicator, Alpine F4 Variable HPF/LPF ... More details »

Alpine F4 Review: I don't even know where to start. The RMS on my birth certificate is 123w per channel. I upgraded from an audiobahn 600w amplifier and the sound quality does not compare. The Alpine PDX F4 makes my Type S speakers sound amazing.The only con I have with it is the price but I figured it would pay off in the long run since I can take it car to car.Definitely more than satisfied with this purchase. I would recommend it to everyone.2 of 2 . Read more »

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