Voltage stabilizer or UPS for a HiFi system

Usually if there is a surge, the home load distribution box (LDB) should trip the individual MCB or the mains.
These surges normally happen when mains power comes back on.
That is a current surge in the main CB that won't harm your equipment. what harms is the over voltage - I won't call it a surge since it is sacrilege in EE parlance to call anything that is not in microseconds i.e., steep wavefront a surge :)
 
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