I recently bought a SB3 at a very good price, but after I got it, I found heavy corrosion on the RCA plugs. Now my router went bad, so I cannot test the SQ of the SB3. I am wondering if this will significantly affect the SQ. I understand the corrosion happens on the ground channel, but I cannot open the SB3 to check if there is any damage on the signal.
Any opinions are greatly appreciated. Thanks