Input voltage and your poweramp


I have a pair of solid state mono block amps that's make excessive noise from their chassis. It's a loud buzz that develops to a rattle at times. Their tech is saying the problem is caused by the voltage level from, which fluctuates down to 116V. The utility company is telling me that the voltage is normal. For those here in the US, can you measure the voltage level at your socket? Thx.
ping2357
Ping, incorrect voltage, either high or low is hard on poor quality transformers. 116v hardly qualifies as low. 130v borders too high. Push the tech harder. I hope you are under warranty.
They're GamuT M250 monoblocks. I have 2 pole main coming into the house. Circuits on 1 pole measures 116-118V. The other pole measures 121V. Moving the amps to 121V sockets didn't make any difference. Also tried an UPS with voltage regulation. GamuT is suppose to be sending new transformers. The question is will the transformers fix the problem?