Tony: Yep, they're both head units. My Empeg feeds into the line-in adapter on the Kenwood HU.

Natch, I've traded off the functionality of the parametric EQ... but I prefer being able to leave the Empeg at home/office, and still have a fully-functioning stereo.

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Empeg Mk. 2 #626, 18Gb blue | Kenwood KMD-X92. 2000 VW Passat wagon.