Last time I checked, Axiom and Bryston individually were sub-$10M/yr revenue businesses. That would correspond to a personnel count of 50-100 employees.
They're a rounding error compared to the multi-billion dollar businesses of Bose, Sonos, and Harman. But even high revenue growth won't fix a broken business model. Remember Monster Cable? They were moving $200M of product just a decade ago before imploding.