Harman Audio offers its factory-refurbished Infinity by Harman Kappa Five 5-Channel Amplifier for $144 with free shipping. That's tied with our refurb mention from last summer and $221 under the lowest total price we could find for a new one. 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 1-year Harman Audio warranty applies.