listening on hi fi

[Shannon]

The better the stereophonic channel separation on the incoming audio, the better the impact will be. So having them playing directly into only one ear each is ideal - this headphones. But on speakers, having them be opposite the head with ears facing them is idea. That does not allow for very realistic usage conditions, and fortunately, it is not required for success. Any stereo audio source will do, even if you move about the room. It just works best on perfect stereophonic separation, which you will only get from headphones, but headphones will probably not be ideal for using during some activities, and are not recommended for ultrasonic usage.