How do I use my DMM to test the preouts of my HU?

[Brahma15]

Thanks .

I just need to know where i need to put the leads of the DMM.

[blue LEDz]

Thanks .

I just need to know where i need to put the leads of the DMM.

well, you could stick one lead in the hole of one of the RCA's, and the other on the outside, but that won't get you a truly accurate reading. you have to measure it with AC volts. i use a voltage divider i made running inline with the RCA's, so i can keep the RCA's hooked up the the processor or amp, but still measure the voltage. that way you keep the proper impedence that the HU sees.

[Intruder]

And you connect that voltage divider... to what? Your laptop's sound card?

[blue LEDz]

And you connect that voltage divider... to what? Your laptop's sound card?

yep i'm still trying to get it to work as an osciliscope

[Intruder]

trying? are you having trouble? anything I could help with?

[blue LEDz]

trying? are you having trouble? anything I could help with?

naw, it's just the program from what i can tell. if i route the sound card output directly back into the input, the wave is still not right it might just be the settings, but i downloaded 5 other programs to try.

[Intruder]

maybe your soundcard isn't full duplex??
I know my dad did an experiment like that but used 2 soundcards. Maybe there's a reason...

[blue LEDz]

maybe your soundcard isn't full duplex??
I know my dad did an experiment like that but used 2 soundcards. Maybe there's a reason...

could be, but i never even got it to work right when running off the HU at low voltage directly into my sound card

[Brahma15]

Im still having problems, i tried as you suggested but my DMM isnt displaying anything but 000.

[Intruder]

It's probably not connected right, or you have not selected the proper range and it's giving you an "overload" error by the 000's. Just my guess.