My new bought R-5 just making noise.."zzzzzzzz".
Then try open it up and see whats the problem.
Then try open it up and see whats the problem.
Twisted the AC power lines, now the problem is solved.(see the pair of blue wires and black/white wire behind.)
Previously covered whole of the AC lines with aluminum foil but afraid that it will increase the capacitance of AC so remove it in the end.
Problem solved and it is dead silent now. Quite nice to listen although it doesn't have tweeter.
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