Pre-amp voltage test?

[bowtiefan 10+ year member]

i have a multimeter and was going to test the pre--amp voltage from my RCA's,but dont know how to go about it........any ideas?

Click to read more...

 

[97dakota 10+ year member]

Originally posted by ThunderTunes get an old rca cable and cut it and then split the wire then that'll work

wtf, I would geuss, put the dial on the lowest dc setting and see what the metere reads. I don't know wtf that guy was talking about. hope it helps

 

[taylor 10+ year member]

excuse thuder tunes he's kind of a flamer....

 

[Gauntlet 5,000+ posts]

get an old rca cable and cut it and then split the wire then that'll work

//content.invisioncic.com/y282845/emoticons/confused.gif.e820e0216602db4765798ac39d28caa9.gif //content.invisioncic.com/y282845/emoticons/confused.gif.e820e0216602db4765798ac39d28caa9.gif

 

[bowtiefan 10+ year member]

i've tried testing it,but all the meter come up with was .77 volts.....I know that cant be right

 

[rpeAMP 10+ year member]

Originally posted by bowtiefan i've tried testing it,but all the meter come up with was .77 volts.....I know that cant be right

That's probably right...if your head unit is rated at, say, 4V, it's not always going to put out that much, only when the volume on the HU is up will it get higher.

 

[rco8786 10+ year member]

Originally posted by ThunderTunes i said it would be easy to get a rca cable and split it and then test it all u need is half of it so **** u all i'm not a flamer just some knowledge that u s don't have lol:nono: //content.invisioncic.com/y282845/emoticons/furious.gif.fc81ca146dbff91fede3ed290dbc4f4c.gif

lmao you just make stuff up man. u dont have any knowledge whatsoever. why the hell would u ruin a set of RCA's just to test the voltage?



























...flamer

 

[taylor 10+ year member]

ha ha ha, for some one who claims to have that whole system, you don't know **** all....

 

[lamontjersey 10+ year member]

voltage meters were designed to test ac voltage in the form of a sine wave, just like the kind that comes out of your outlet. the out put of a car stereo puts out the voltage in a sloppy pattern that was meant to reproduce sound. problem is, the only way to get a proper reading out of an rca is to play a cd with a sine wave on it . you need somebody to record a sine wave onto a cdr , but it has to be between lets say 15-20000 hz and its amplitude cant be too big either. the proper way to test would be to put the out put on an oscilloscope and read the peak voltagebefore it clips , but like i said the only way you will get a reading on a voltage meter is to have a pure sine wa ve on a cd, then test the sine waves out put, but that will be an rms value, just divide it by .7 to get the peak value.

i believe you can input a signal from a frequency generator into your computer and record with sound recorder then burn that onto a cd, or you can actually input your house ac outlet voltage into a transformer to get it way down, then input that into your computer. i know this sounds weird but it seems theoretically possible, i was going to do that my self but iwas like, whats the purpose... also , there was a guy on here giving out test cd frequency samples, maybe you should contact him and ask for a specific amplitude.

 

[80_Cutlass_mn 10+ year member]

Originally posted by lamontjersey voltage meters were designed to test ac voltage in the form of a sine wave, just like the kind that comes out of your outlet. the out put of a car stereo puts out the voltage in a sloppy pattern that was meant to reproduce sound. problem is, the only way to get a proper reading out of an rca is to play a cd with a sine wave on it . you need somebody to record a sine wave onto a cdr , but it has to be between lets say 15-20000 hz and its amplitude cant be too big either. the proper way to test would be to put the out put on an oscilloscope and read the peak voltagebefore it clips , but like i said the only way you will get a reading on a voltage meter is to have a pure sine wa ve on a cd, then test the sine waves out put, but that will be an rms value, just divide it by .7 to get the peak value.

 

i believe you can input a signal from a frequency generator into your computer and record with sound recorder then burn that onto a cd, or you can actually input your house ac outlet voltage into a transformer to get it way down, then input that into your computer. i know this sounds weird but it seems theoretically possible, i was going to do that my self but iwas like, whats the purpose... also , there was a guy on here giving out test cd frequency samples, maybe you should contact him and ask for a specific amplitude.

I would use a digtal multmeter on a low ac setting with a sine wave signal of about 50-6 hts so it would read right. As for the wall outlet and the computer thing woluldt trust that, allthough thereticaly as you stated it would be possible but it would have to one hell of a step down transformer.lol

 

[80_Cutlass_mn 10+ year member]

Originally posted by lamontjersey voltage meters were designed to test ac voltage in the form of a sine wave, just like the kind that comes out of your outlet. the out put of a car stereo puts out the voltage in a sloppy pattern that was meant to reproduce sound. problem is, the only way to get a proper reading out of an rca is to play a cd with a sine wave on it . you need somebody to record a sine wave onto a cdr , but it has to be between lets say 15-20000 hz and its amplitude cant be too big either. the proper way to test would be to put the out put on an oscilloscope and read the peak voltagebefore it clips , but like i said the only way you will get a reading on a voltage meter is to have a pure sine wa ve on a cd, then test the sine waves out put, but that will be an rms value, just divide it by .7 to get the peak value.

 

i believe you can input a signal from a frequency generator into your computer and record with sound recorder then burn that onto a cd, or you can actually input your house ac outlet voltage into a transformer to get it way down, then input that into your computer. i know this sounds weird but it seems theoretically possible, i was going to do that my self but iwas like, whats the purpose... also , there was a guy on here giving out test cd frequency samples, maybe you should contact him and ask for a specific amplitude.

I would use a digtal multmeter on a low ac setting with a sine wave signal of about 50-60 hts so it would read right. As for the wall outlet and the computer thing I wouldnt trust that, allthough thereticaly as you stated it would be possible but it would have to one hell of a step down transformer.lol

 

[80_Cutlass_mn 10+ year member]

Sry,hit the submit button twice.//content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

 

[80_Cutlass_mn 10+ year member]

Originally posted by Jmac Why don't you just take the loudest song you have and see where it peaks ?

yea thatll work also, and in that case it would be, (for me), my lil john and the eastside boyz-i dont give a f***.//content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

 

[bowtiefan 10+ year member]

Originally posted by rpeAMP That's probably right...if your head unit is rated at, say, 4V, it's not always going to put out that much, only when the volume on the HU is up will it get higher.

that .77 volt reading was with the volume turned all the way up and on low........it didnt change thats why I said it couldnt be right...........bah...the hell with it...........didnt think it was going to all that damm complicated

 

[bowtiefan 10+ year member]

thanks for all the input and advice though guys......//content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif