I am dead sure my original HU looked and acted exactly the same as the one I got from them with an AUX in, except the one i received has the spatial option, which my original one did not. Other than that they are identical.KyleT said:yeah spatial. Im not sure how it all works together, but in a HK truck it is VERY noticeable. Is yours HK? i dont think the HU's can be swapped back and fourth and work 100%. also, 99-02 and 03-04 are different IIRC as well (color and possibly more), so there is 4 or more different HU's possible (alpine version)
Spatial imaging enable
The head unit spatial imaging enable output is connected from the head unit to the power amplifier on an SG wire.
So, what does imaging have to do with subs, thats what I want to know.
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