Computer Hardware
You should never put floppy drives, hard drives, or even VCR tapes or cassette tapes on top of speakers (or near any other source of magnetism) because of:

EXE
RFI
IOU
EMI
FYI

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Computer Hardware
A brownout is defined as:

a slightly elevated voltage lasting from seconds to minutes or more
a slightly decreased voltage lasting from seconds to minutes or more
has nothing to do with electricity
alternating power out, power on lasting a few minutes
complete power out lasting a few minutes

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