Changing speakers will not change the signal. If changing speakers, fixed the problem then there was a speaker issue. Windows and audio drivers can not be blamed for speaker issues. If it was a windows or audio driver issue then changing speakers would not have resolved anything.
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Originally Posted by Shintaro
Anyway for an amplifier circuit to work it needs power. As far as I know the output from a PC is just the audio signal.
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You are correct, both analog and digital signals are standardized signals. Neither signal can be altered by changing speakers. Power requirements has nothing to do with the signal itself.
However there is still power requirements involved in analog
1/8" Stereo and digital
S/PDIF ports. The on-board analog signal power rating is usually standardized and if one requires more power, a set of powered speakers would be the only solution. The digital signal will require converting to analog for driving the speakers, so they will always be powered speakers. With
TOSLINK fiber optics there is no power transfer since the output is in the form of light.
With all this said none of it matters for quality sound when the speakers themselves are damaged.