True underdog hi-fi

I'm interested to see what shouts you would make for some underdog hi-fi components.
Regardless of name, perceived provenance or price point, what items have you heard that have put a smile on your face as because they had no business being so musical in the first place?"

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EDITORIAL NOTE: The opinions expressed in the above post do not necessarily reflect those of our editorial team – just in case you wondered. Neil McCauley