hifi engine

Trouble shoot for Meridian power amp 105

lwong2's picture

I have very little knowledge on electronic and would like to seek some advice on the following problem :

I am having a set of 2 units of meridian power amplifier model 105 .

when the power amps are powered up one side of the speaker woofer will be sucked in.
When the speaker wire is reversed , the woofer will be pushed out.

It seems that there is Dc leakage --- i think ?

If so, what is the likely caused and where can this leakage comes from ? what can i do to trouble shoot or trace this problem.

Thank you.