The new presonus on thoman

[WK154]

Surely you still need a router in the system WK (your knowledge is much greater than mine but I didn't think you could connect more that two devices without a router)?

Sam it actually depends on the software implementation. Knowing Presonus you will most likely need an access point. Once there is a manual we'll know for sure. I doubt that they have the inclination to implement ad hoc WiFi. I just remembered that this is a PC implementation and they lucked out. Here are some articles describing ad hoc.
http://techsansar.com/internetworking/wireless-home-networking-with-ad-hoc-network/
If the Presonus software doesn't support ad hoc a hotspot in the PC will fix that problem.
http://techsansar.com/internetworking/wireless-home-networking-virtual-wifi-hotspot/\
For the i crowd here are the instructions.
http://www.logicinmind.com/en/support/iphone-ad-hoc-wireless-network/
Build into iOS7 is Multipeer  Connectivity Framework a form of mesh networking. Apps like FireChat.