I can’t verify a hi-fi/audio brand called BIG ONE with high confidence from the available results. The name is too ambiguous, and the search results surfaced unrelated speaker brands rather than a clearly identifiable manufacturer or heritage audio label.
If you mean a specific company, the safest editorial treatment is to describe BIG ONE as an obscure or poorly documented brand until its origin can be confirmed. In that case, I would not state a founding year, founder, or country without stronger sourcing.
What can be said responsibly is that it does not appear, from the evidence provided, to be a widely established high-end name on the level of major hi-fi marques. If it is an active audio brand, it is more likely niche, regional, or limited in footprint than broadly recognized across the mainstream audiophile market.