Kenwood DNX8120 HISS problem

[jeff33702 10+ year member]

Ok, I've been working on the gains and following JLs instructions. I end up with the AMP set on low voltage input (this should be for HUs with maybe 2v outs, right?) and the gains end up pretty high, resulting in a hiss when the RCAs are connected but the HU is on low volume. Engine isn't running and the RCAs are good.

To me, being that the 8120 has a 5v out, I should have the amp set on high voltage and shouldn't need to crank the gains to achieve the 24.5v that JL says it should be.

So, is my HU not putting out the voltage that it should?? How can I accurately measure this? My neighbor has a similar HU, I'd like to compare.

Thanks

Jeff

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