5Ghz has a lower range than 2.4ghz wifi. The Audeze rep may be able to clarify, but I'd assume/assess they have their own codec for use over 2.4ghz thats why they have their own dongle rather than just having bluetooth connectivity, they could be using a raw wifi like signal that they can use a higher bandwith of, rather than in bluetooth where you are restricted by the specification with various needs for handshakes/encryption and limited bandwidth. Think of how much bandwidth there is when you are streaming netflix over wifi. Imagine being able to utilize a large portion of that rather than being limited to 990 kbps of LDAC while using bluetooth. Them mentioning they have 3x the range, makes me think this is comparable to a bluetooth class 1 chip which has stronger signal strength (I believe 10 times as much if I remember correctly, 100mw vs 10mw or less I think) based on significantly higher power output. I'm glad to hear that, and surprised it can maintain that strong of a signal for 80 hours. I'm in, and have a preorder in. I was disappointed in the Mobius soft coating pealing and Penrose, where they both are plastic and have poor engineering where the yokes meet the headband. Having the Maxwell with metal frame will hopefully defeat both of those issues.
Question for Audeze, can you use bluetooth for something like music, simultaneously with a connection to the dongle for say xbox gameplay?