Measuring Amp output V and I

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Used a true rms meter at AC setting to measure o/p voltage of a amp ....the reading is only in mV when the loudspkr is working?
Is it because the meter is limited in freq ?

Also plan to use a true rms clamp meter to measure the output current into the loudspkr? not sure if this will work either ?

Any pointers to existing threads appreciated.
 
For most speakers in most rooms playing music at 'normal' volume levels (i.e. much lower than 'live' levels) the voltage will be small.
Indeed, average levels around 100mVac are quite common.

You need to send a known, measured, test signal into the input and measure the output.
Pano has a test to do exactly that and gives the file to record to a CDR to provide the test signal.
And a DVD player can read and send the correct test signal.
 
Used a true rms meter at AC setting to measure o/p voltage of a amp ....the reading is only in mV when the loudspkr is working?
Is it because the meter is limited in freq ?

Also plan to use a true rms clamp meter to measure the output current into the loudspkr? not sure if this will work either ?

Any pointers to existing threads appreciated.

with speakers, power is simply not the same as with a dummy load resistor...
a couple of months back we confirmed a Crown clone amp of 1kw (FTC) output into an 8ohm dummy load....

using a kill-a-watt device, with music playing into our speakers at chest pounding and ear splitting volumes, power draw from the mains was l little over 200 watts...
 
Due to the reactive nature of a loudspeaker you can not measure Vrms and Irms only to arrive at consumed power, you need to include phase angle as well.

Also, naturally, a 1kW amp playing nice music will have average power much less than 1kW unless you clip the amp like crazy. Music is normally (hopefully) a dynamic signal. Dynamic range may be 10-20dB (average to peak) for most music.
 
Indeed, average levels around 100mVac are quite common.

You need to send a known, measured, test signal into the input and measure the output.
Pano has a test to do exactly that and gives the file to record to a CDR to provide the test signal.
And a DVD player can read and send the correct test signal.

http://www.diyaudio.com/forums/mult...much-voltage-power-do-your-speakers-need.html

Does the spkr need to connected when the test tone runs.
The spkr i have are 4Ohms .
 
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