How to connect a Pioneer XW-SMA3 AirPlay speaker to WPA Personal wifi network?
My speakers are now on my wifi.  A bloke called Jason from Pioneer called me this morning and told me to ignore the manual and instead to do the following:


Turn the unit off and unplug it from Ethernet and power.
Plug the power back in and turn the unit back on — wait for it to power up again.
Plug your iOS device (assumes you have one, and that it is currently connected to your wifi) into the USB port in the back of the speakers and unlock the iOS device so that it shows the home screen.
Press and hold the Input button at the front right of the speakers, along with the hidden little black button on the back labelled • Network Setup / - wireless direct, and keep both held down for about 3 seconds.
A dialog box will appear on your iOS device saying "A connected device wants to share your network settings (cancel) or (allow)."
Press (allow).
Wait about 10 seconds and open the Music app on your iOS device and click on the AirPlay icon.  Your speakers will appear in the list of available speakers.
You can now unplug your iOS device as the speakers are connected to your wifi.


I actually had to try this process twice to get it to work but now it's working perfectly.  In Safari on your Mac under the Bonjour menu in Bookmarks your speaker will appear and you can then perform any other configuration you like, such as giving the speakers a more sensible name.