How many remote wires before you need a relay?

[butterMilk 10+ year member]

Just wondering how many remote wires you can run from a single head units remote wire. And I take it once you have to many you just run the initial remote wire to a relay, then run more remote wires from there.

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[calebkhill 10+ year member]

Heard the same thing one time...

 

[bbeljefe]

It depends on the output current of the head unit and the current draw of the amp(s). But I wouldn't run more than two amps without a relay because a failure in an amp can cause serious damage to your head unit.

 

[calebkhill 10+ year member]

It depends on the output current of the head unit and the current draw of the amp(s). But I wouldn't run more than two amps without a relay because a failure in an amp can cause serious damage to your head unit.

What relay would you suggest.

 

[bbeljefe]

Something like this:

https://www.parts-express.com/12-vdc-automotive-5-pin-relay-spdt-30-40a-bosch-type--330-073

 

[basswiigee]

I've ran three remotes with no issue remote to amp amp to amp to amp..... only ever did one from hu though..... got two on there now without issue...