55 watts per channel, continuous power output, both channels driven into 8 Ohms f om 20 Hz to 20 kHz, at no more than 0.007% THD/Quartz frequency synthesis/5-way tuning/Direct Comparator/IC logic function controls/Hi-fT transistors.

Statistically, the VX5 puts out 55 watts per channel with no more than 0.007% total harmonic distortion.* Even your dog can't hear that.

Part of the reason is Sony's unique "Legato Linear" amplifier. This circuitry prevents "switching distortion" from ever intruding on your music. Another part is an incredibly advanced, Sony-developed "Pulse Power" supply. Its transformer alone is but 1/50 the size of conventional transformers and is as quiet as a church mouse.