: Disconnect all pedals and inputs. If the amp still buzzes with nothing plugged in, the fault is internal (likely the power supply) .

: Aging preamp or power tubes can cause crackling or volume-dependent humming.

Audio interference, commonly referred to as "buzzing" or "humming," is a frequent challenge in both home audio and musical instrument amplification. While these sounds are often grouped together, they typically stem from distinct electrical phenomena—either external interference or internal component failure. 1. Differentiating Hum vs. Buzz

: Loose or oxidized jacks often trigger intermittent popping or buzzing when cables are moved. 3. Diagnostic Procedures and Solutions To isolate the noise, follow a process of elimination:

: Audio cables can act as antennas, picking up magnetic fields from Wi-Fi routers, power cords, and fluorescent lighting. Component Wear :