What tips/tricks do you guys use to find the slight hiss that is made from your headunits? I've got a CDA-117 that has always seemed to have it (going from a DEH-9800BT which also had it). It doesn't drive me nuts but what are some tricks/tips I could try to eliminate it? Not using the headunit amp. Knu Karma cables ran separately on 02 GMC Yukon passenger side (power on driver side). Kicker ZR600 on front doors and ZR240 on rear fill; both gained appropriately though less than they could be safely. Sub amp and door amps share same remote.
Tried using RCA output from ZR600 to ZR240 but that seemed to make it more apparent. All contacts on modules are clean and crisp.
Also, each amp I've used on doors which include Aura RPM2300, ZR's, MB Q RAA2400, and others have had similar hiss so I can't think it would be the amps.
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