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Output test on amp

Is there a way to test frequency response vs dB output with a test record and multimeter?

im trying to determine if both channels are outputting all frequencies at equal outputs. 
If not is there another way to achieve this at home. 
last_lemming

Showing 2 responses by minorl

minorl
1,021 posts
 
Also, you want to measure this directly from the amp, not through the pre-amp to the amp.

in addition, if you really want this done right.  use a Osciloscope instead of a DB meter.

But, we are talking inexpensive here.  So a Radio Shack DB meter (or app on cell phone), and an inexpensive signal generator.  

Plug the output of the signal generator into one channel of the amp, Set the DB meter 1 meter away from the speaker and start the test.

enjoy
minorl
1,021 posts
 
An inexpensive signal generator is what you need.

Connect the signal generator to the amp, with level all the way down.

Get a DB level meter and from the lowest frequency to the highest, go for it.

Set it at 1KHZ first and a decent output level from your amp as measured on the DB meter.

Then go to 10 HZ, 20 HZ, etc. up to 20 KHZ and see if the output stays flat.

It should rise up to the -3DB point and then stay relatively flat until around 20 KHZ and start to roll off.

enjoy
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