One side louder (another one again!)

Dear Dr. Jon Wong,

I just purchased an integrated amplifier and I realised that one side is louder than the other. This therefore also affects the soundstaging. Tried swapping cables, speaker position and speakers but the same thing still persists. Using a voltmeter to measure the amplifier speaker outputs provided the following results:

(these were tested at various listening levels using XLO burn and test CD test tones)

Left	Right
0.090V	0.025V
0.131V	0.045V
0.484V	0.285V

What can be the reason of this? I changed a new set and the same thing happened.

Simon

Hi Simon,

First of all, the test data you gave me show that the ratio is not constant. (0.28, 0,34, 0,58). Are they taken at difference frequencies? You should use the same frequency and vary the volume. Otherwise it does not tell anything.

If the ratio of the L and R channels remains the same at the same frequency but different level, then it may be the following:

1. There is something wrong wih you volume control. Easy, change it.

2. There is something wrong with the gain setting of you amp. Adjust the feedback/ gain resistor.

Are you sure it is the amplifier? Have you swapped the source? If you say you changed the set and the same thing happened, could it be your CD player?

Good luck.

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