I just got an Empeg from carplayer.com, and just finished installing it. It's great so far, exactly what i've dreamed of for the past 2+ years.. my question however, is how can I identify this as a mark 2a or 2? I was told by the carplayer people it's a 2a, but I'm getting the audible pop when I turn off the car(negative spike bug) and the FAQ tells me the 2a has the diode to silence this built in.

What gives? did I get duped? *sigh*