RCA Voltage

[DAMONMCHALE]

So I've been trying to read my rca voltage with my o-scope and I can't get any readings. I've tried multiple meters and still no luck.

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[HI-C 10+ year member]

Have you tried AC on the meter?

 

[Umbra]

You'll have to play with the magnification (I doubt that's what it's called) because you'll be dealing with 0-5V most likely.

Also, you'll need to play a test tone at high volume for you to see that sinewave anywhere near what the preout voltage is rated at.

Edit: I saw you're doing this for setting gains. I haven't watched EXO's video mylows linked you in your other thread, but if you're using negative dB test tones be sure to use 0 dB while setting your head unit, then the negative one at the amp. If you use a negative dB toneat both points you'll end up with gain settings higher than you want.

 

[DAMONMCHALE]

I've been using 0db tones and haven't gotten any voltage.

 

[los33 10+ year member]

I've been using 0db tones and haven't gotten any voltage.

Whats your volume at and how are you putting the pins to read the voltage?

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[DAMONMCHALE]

Volume at 35/35 max ground on outer ring and positive on center pin 1khz tone at 0db multimeter on AC voltage.

 

[los33 10+ year member]

Volume at 35/35 max ground on outer ring and positive on center pin 1khz tone at 0db multimeter on AC voltage.

Ground to a different metal in the car and get the positive on the rca pin.

If it works you may have a headunit grounding issue.

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[DAMONMCHALE]

Music sounds great how would I have a heady it ground issue?

 

[los33 10+ year member]

Music sounds great how would I have a heady it ground issue?

A blown pico fuse would give you output issues. A bad rca ground would decrease output from what it is originally capable of.

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[DAMONMCHALE]

Pico fuse?