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Old    Ronia (ladythump)      Join Date: Jul 2004       07-04-2006, 7:32 AM Reply   
I know you shouldn't run your RCA cables along side your battery power cables off your amps. I'm just wondering if this is true if the amps aren't connected at all.
I have a 4 channel amp under the driver's feet and two other amps in my storage compartment on the port side. The battery is located on my port side so the battery power cords coming from the 4 channel amp will into the port side, and the RCAs from those port side amps need to run to the headunit. Should I still keep those RCAs and Power cables seperate even though they aren't running off the same amps?
Old    Derby (derby)      Join Date: Nov 2005       07-04-2006, 7:57 AM Reply   
If the power could produce noise in the signal it wouldnt mattter were it was coming from.

However, typicaly DC power circuits dont induct any noise into an analog signal. We usually only worry about AC circuits.

So....I wouldnt worry about it. Even if the DC could do something a few feet wouldnt hurt.

Good luck
Old    Mikeski (mikeski)      Join Date: Aug 2003       07-04-2006, 2:18 PM Reply   
The current going through the wire is not truly DC. In boats utilizing rectified alternators for charging systems there is a significant "ripple" in the charging current. When the power wires are run within 6" of the audio signal cables they often induce a signal over the audio cable that can be heard as noise through the audio system. Amplifiers with switching mode power supplies can also induce noise into the audio section of the amps.

If you use very high quality well shielded twisted paired audio cables you might be able to run them together.

Personally I don't like this charging noise so I run my audio cables away from the power wires.
Old    Ronia (ladythump)      Join Date: Jul 2004       07-04-2006, 4:24 PM Reply   
Mikeski,
SO you can get the noise when you run RCAs over power wires even if the power wires are from another amp??? That's my original question.
Old    Mikeski (mikeski)      Join Date: Aug 2003       07-05-2006, 11:21 AM Reply   
Yes, it's transmitted as a signal doesn't matter where the unit is powered from.

If it's easy to change then go ahead and run them together, you might get lucky.
Old    Ronia (ladythump)      Join Date: Jul 2004       07-05-2006, 12:13 PM Reply   
No, I'll just do it right the first time.
Thanks.

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