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What is the output voltage and impedance of the 7.1 channel audio pre-outs and of the subwoofer output on the 551R?

The pre-amp output impedance of the 7.1 is 1 Kohms, the maximum output voltage is 3 volts RMS. The level is flat 20Hz to 20KHz.

The output impedance of the sub output is 1K5 ohms, the maximum voltage is 900 millivolts RMS. The level is flat 20Hz to 20KHz.

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