Which one is positive?

[Dater]

I need the positive one so I can connect my electronic crossover in home, there is the middle cable (protected with rubble of course), and some wire around it (which I folded into one side). Which one is positive?

this thing is an AC to DC converter

Pls answer if you’re 100% sure

[themctipers]

use multimeter

check which one is + and which one is -

 

there might be a hint on the power supply as it might tell you if the center is positive or negative.

[BlueChinchillaEatingDorito]

5 minutes ago, Dater said:

I need the positive one so I can connect my electronic crossover in home, there is the middle cable (protected with rubble of course), and some wire around it (which I folded into one side). Which one is positive?

this thing is an AC to DC converter

Pls answer if you’re 100% sure

Because a blurry picture of some random exposed wires with no colour coding is going to be enough for people to make the correct decision. Use a multimeter.

[Dater]

3 minutes ago, themctipers said:

use multimeter

check which one is + and which one is -

 

there might be a hint on the power supply as it might tell you if the center is positive or negative.

Hek there’s indeed a hint

[kb5zue]

In a case like this, the outer wire is the negative.  With shielded cable or wire, the center lead (wire) will always be the positive and the outer lead (wire) will be the negative.  There is a reason to the madness.  The outer lead (wire) is always the negative because that way if the wire becomes bare for some reason such as rubbing against the inside of the case or something similar then the negative wire will short to ground.  Ground is always the common lead.  Take your car or truck for example, the same applies there too.  Notice the negative lead from the battery of your vehicle is directly connected to the block or frame of the vehicle.  That makes it easy to hook up things like extra lights or other things because the only extra wire that needs to go to the new light is the positive wire that comes from the switch.  For the negative wire of the new light all you have to do is connect a short wire from the negative side of the new light to the frame or body of the vehicle.