A friend has as set of 33 year old powered speakers...bought them in 1995. She has never had a motherboard burn out. She keeps the power unit away from (like in the opposite corner on the same wall) the computer and just runs a long shielded cord between the computer output and the amp's input. Most of the higher end amps & speakers have superior shielding so they don't pick up or cause any extra noise. Back in the 1990's and 2000's, computer cases were steel all the way around. Since the 2010's, cases now have plexi-glass/plastic coverings to show of the lighted interiors. Plus they are made out of metals/composites which allow a lot of different frequencies of Radio noise (RF) to penetrate into the installed system. This is why I will NEVER build a computer in anything other than full steel enclosed case. TQQdlesâ˘