There will be an HPF on the phone and YouTube will add some compression. As I was stood behind the phone/camera I can say that what I heard on the video was quite close to what went on in the hall. My other comments, the ART 310s were a long way apart and it did notice when walking around the room, The ART745s were better than the EVOX "Sun ob a stick" and the ART 310s but the difference was not as much as I expected. The EVOX was very close to the 745 and based on this short shootout, was probably the best "tea chest bass" system I have heard. To clarify I have heard Bose, Yamaha, LD Systems and all three have a nasty mid range that spoil the vocal sound, although this could be the wetware and/or crappy wireless mics in use.,rather than the system. YMMV