This is not a common problem but has happened.  This has not been adequately explained in the operating manual.  For safety sake, the power switch on the power transformer is set to "240 VAC."  This is to protect the Re-Equalizer from damage in 240 VAC areas.  If the power transformer had been set to "120 VAC," the unit could be damaged.  So, the default setting at the factory is "240 VAC."

If you live in an area where the power voltage is 120 VAC, make sure that the power transformer power switch is set for you power, i.e., 120 VAC.  If it is not, you will experience high audio distortion during loud passages in many records.