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RCA Cables, Is There A Downside To Making Your Own?

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Member - Posts: 1
Member spacespace
Joined: May 18, 2020
Location: Kentucky, United States
Posted: April 03, 2021 at 4:04 PM / IP Logged Link to Post Post Reply Quote daaq
Hello, I want to discuss making RCA cables for the pre outs to the amp.
This is what I did on my wife's car, planned on doing to my vehicle, but I have alternator/engine hiss on her vehicle that I can only get to go away if I turn off I believe it is the HPF switch on her amp.
I've seen suggestions of grounding the RCA ports for quick fixes, I believe I have a ground loop issue personally, but that is besides the point.
I made the RCA cables for the HU to the amp. I used this particular coax cable. 75 Ohm XPRESSPREP Coaxial Headend Cable, Series 59, red flame retardant PVC jacket
I used red and white, the specs are the same for each.
It is Head end coax cable, RG59 quad shield 75ohm with silver coated copper clad steel center conductor, aluminum braiding 95% inner and outer braid shielding. Using RCA compression connector fittings.
This is the type I used. Belden SNS RG59 RCA Compression Connectors
Could this cable be causing me issues? I did not even think to check the different types of pre made RCA cables for car audio and what their OHM ratings might be.
As far as the engine noise in the system, her vehicle is a Dodge Charger and the battery is in the trunk as is the amp, I do not think there are any power wires running alongside the RCA wires.
Thanks for your time. I would like to keep the discussion mainly to the RCA coax cables. TIA.
Silver - Posts: 424
Silver spaceThis member consistently provides reliable informationspace
Joined: February 15, 2012
Location: United States
Posted: April 15, 2021 at 1:58 PM / IP Logged Link to Post Post Reply Quote mgoetz74
are the rca cable run down the passenger side? if they is a 0 gauge wire runs down that side of the vehicle for the jump start post in engine. Could be picking up emf off of that, unplug the rca from the amp and see if the noise goes away, if it does you know its the rca. Try a second set of rcas (pre manufactured) out side the car and see if the noise come back
33 years as a installer now just a retired old guy. Favorite thing to install/topic are remote starts/car alarms. Stop using test lights!!!

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