Any EMI Experts Here...?
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Elder User
Joined: Jul 2003
Posts: 544
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From: Cupertino, CA
Any EMI Experts Here...?
Hi, all –
This is a rather unusual question. I have a toolbox in the bed of my truck that houses a bank of deep-cycle batteries. I'm toying with the idea of installing some audio amps in there too, but am concerned about picking up noise from the 12V power whizzing around. I know that with the properly-shielded interconnects, I can avoid noise entering the system there, but what about the speaker wires? Can noise creep in there? What about the amps themselver; can they be too close to the batteries and somehow pick up noise that way?
Thanks...
This is a rather unusual question. I have a toolbox in the bed of my truck that houses a bank of deep-cycle batteries. I'm toying with the idea of installing some audio amps in there too, but am concerned about picking up noise from the 12V power whizzing around. I know that with the properly-shielded interconnects, I can avoid noise entering the system there, but what about the speaker wires? Can noise creep in there? What about the amps themselver; can they be too close to the batteries and somehow pick up noise that way?
Thanks...
New User
Joined: Nov 2004
Posts: 22
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From: Minneapolis, MN
Basically the best way would be if you made the amps there own comparment inside of the tool box, and line it with metal (even tin foil will work), I'm not sure if the amps would be affected them selfs but where the connections get covered this way too, then run the speakerwires as far away from the batteries as possible.
Freshman User
Joined: Dec 2004
Posts: 39
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well technically, depending on the current propegating through there, you can inductively couple through another wire. I'm a EE in the field of EMC. so yes, I know.
The best way about avoiding this is using a shielded braid around the RCA or what ever, and ground only ONE SIDE of the braid. The theory is all energy goes back to ground.
The best way about avoiding this is using a shielded braid around the RCA or what ever, and ground only ONE SIDE of the braid. The theory is all energy goes back to ground.
Thread Starter
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Elder User
Joined: Jul 2003
Posts: 544
Likes: 0
From: Cupertino, CA
Hmm...well, there's potential for plenty of current...I have four batteries wired in parallel...so I guess I'll just go with the best-shielded coaxial cables I can find and hope for the best. Do I need to worry about the speaker wires, too?
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