I don't know. I have the technical specs here but I can only read there's 125 watts low-frequency power and 50 watts high-frequency power. But there must be standing some values on the back panel of your system (there where you have the power supply). You need the value of the voltage (I guess 220 volts) and the value of the incoming current (I guess about 0.5 amps). So I would tend to say that 175 watts are the sinus power (peak-to-peak)...

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Greetings from Frankfurt (Germany),
Sheriff ;-)