Harman Kardon offers its factory-refurbished Infinity by Harmon Kappa Five 5-Channel Amplifier for $144 with free shipping. That's the lowest total price we could find for a new model by $125. It features 50-watts RMS into four channels and 350-watts RMS into one channel, 85dBA signal-to-noise ratio, 12dB per octave electronic crossover, and frequency response of 10Hz to 75kHz. A 3-year Harmon Kardon warranty is applied.
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