After making acquisitions of smaller developers, large companies tend to absorb the people and inventions they bought, doing away with the branding. Logitech's acquisition of well-known premium headphone maker Ultimate Ears went differently: the UE name is still around, and now Logitech is using it in a high-end speaker system called the Logitech UE Air Speaker ($400). Air Speaker is the most expensive Apple-focused speaker yet released by Logitech,…