I just bought a couple of USB MIDI Host boards (http://www.hobbytronics.co.uk/usb-ho...-host-board-v2) With the goal of using the Teensy as the merger/router.

My goal would be to power the Teensy and all the USB host boards from a single USB cable plugged into a USB wall charger (the ~2.5A variant).
If I power the Teensy from it's microUSB port I assume I can't use the Vin pin to provide 2+ Amps to the host boards ? I would need to split the power from the USB cable before going into the Teensy ?

Thanks !