How does the EQ switch on the Architect P250 EQ affect the output?

The Architect P250 EQ comes equipped with 2 EQ presets, configurable with the switch on the back of the amplifier.
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When the switch is set to OFF, the P250 doesn't change any of the frequencies on the incoming signal.
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With the switch set to preset 1, the P250 boosts the bass and treble frequencies. This is a loudness curve that improves clarity at low volumes, and can improve the listening experience at higher volumes.
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The EQ curve for position 1 looks something like this:
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With the switch set to preset 2, the P250 adds a healthy boost to low end frequencies. This can make small bookshelf speakers have greater presence, or let your neighbors know how good your sound system is.
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The EQ curve for position 2 looks something like this:
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