Amp problems

[Blessing]

Hi all. I have a problem with my audiobank monoblock amp, every time I want to play music I have to push the volume way up for the amp to kick in or I've to tap it for it to play, when I'm driving it keeps on giving me the sound then cuts back again then cut. When I check the amp it's on but no sound till I tap it. I suspect there's something loose inside the amp. Any idea on what it could be? Thank you in advance.

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