The power has been confirmed. This is a PIONEER AV Digital Surround Amplifier VSA-930. Based on the VSA-900, this AV control center has 5 amplifiers, Dolby Pro Logic surround, and a dual center system to improve sound localization. It is equipped with Dolby Pro Logic surround using an active matrix. The directional emphasis circuit (steering logic) achieves a sense of scale that was not possible with previous surround systems. It has 4 center channel modes that allow you to adjust the effect depending on the speaker matching. In Normal mode, signals below 100Hz, which have almost no effect on directional localization, are distributed to the left and right channels, and the center channel cuts and outputs signals below 100Hz.
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