I just received my 990 and even though I haven't connected it yet (waiting for the 7700 to deliver), I just noticed something while going through the manual.

Why is "THX" shown on the display to the the left of "Dolby"? There no mention of this in the Owner's Manual, in fact the only illustration of the panel does not reflect the 'THX" light.

I know that Outlaw equipment is not THX certified, so what does this indicator mean? I thought THX cerfication applied only to equipment specs and not to signal.
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Zone 1: Outlaw 990, Outlaw 7700, Panasonic Plasma, Apple TV, 24" Intel iMac, ReVox A77, Mission 77 Series, Mirage LF-150
Zone 2: McIntosh MA1650, Dual 1219, Smaller Advent Speakers
Zone 3: Victor V, Victor Exhibition Soundbox