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How to measure pre amp for channel imbalance?

I want to check my pre-amp for a channel imbalance. With a voltmeter how would I do this? Would I just put the positive probe inside the rca and negative probe to ground and set the voltmeter to ac voltage and measure?
thanks Mike
hiendmmoe
millercarbon's avatar
millercarbon
12,531 posts
 
That'll work.
erik_squires
16,139 posts
 
Get a 60 Hz test signal.

Measure the voltage from center pin to center pin.

This is the easiest/most conveninent way.  If you measure center to shield, you have to take 2 measurements. :)
georgehifi's avatar
georgehifi
10,312 posts
 
hiendmmoe

With preamp not in the system

https://www.youtube.com/watch?v=PyD9cMarVJk
Feed this into an "input L&R" of you preamp, turn up the volume on your preamp to where you normally listen to.
And measure the preamp "output" one channel first (center to outside rca) with an AC volt meter set to 2v full scale, then adjust the website volume so your at say 1v or 1.5v then measure the other channels output. to see if it’s the same.

Cheers George
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