Classic Man
New member
Greetings on this lovely winter's morning. My power amplifier which was recently repaired is working well, however I'm getting a +/-100Hz hum(measured using app on cellphone) from my speakers. I followed all the traditional repair methods as stated on Google. Removed all connections except speaker cable and power, still hum via speakers. I ensured that the power plug is on the same power strip, still have the hum. The hum does NOT increase in volume when volume of amplifier is increased. Clearly messing with my music experience. Any ideas around a solution would be much appreciated. I will have to take amp back to repairer as I suspect it's an internal issue causing the hum. Thanks in advance for your assistance. Enjoy your day and stay warm 
