DMM Sensitivity

[John3000 10+ year member]

Well after buying my el cheapo DMM from Home Depot, I attempted to set my gains property using the DMM. Long story short, I am not getting a reading when I put the probes on the speaker terminals but when I test it on my battery and power/ground wire from the amp I get a read out. I am just curious that my DMM is just shitty and cant pick up on the voltage coming from the speaker terminals? //content.invisioncic.com/y282845/emoticons/confused.gif.e820e0216602db4765798ac39d28caa9.gif

Thx in advance.

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[ultimate157 5,000+ posts]

You need to set it to AC volts for the output on the amplifier.

 

[John3000 10+ year member]

You need to set it to AC volts for the output on the amplifier.

Already did, that is why I am asking if anyone has had this problem b/c its pissing me off.

 

[ultimate157 5,000+ posts]

Post a link or picture of the settings on your DMM... You might have the probes in the incorrect location.

Are you playing a sine wave while testing with DMM on speaker terminals?

 

[GearGuy2001 10+ year member]

Yeah you wouldnt have any voltage unless you are playing a song or tone

If your setting up subs grab a tone around 40-50Hz 0dB and loop that on your cd player, then check for a voltage. Obviously if your tuning speakers grab a higher frequency

 

[John3000 10+ year member]

Sorry for the late response, I will post a pic when I get a chance which is most likely tomorrow. Yes I am using a sine wave that I got from ROE, but like I said I will post pics tomorrow to see if I am doing something wrong and thx for the responses.