Thank you everyone for your advice and input. Durwood, glad to see you're still on here as well. The Y splitter i dont believe would work for me in this set up as it will have to half it's signal strength down each pipe and then i would have to amplify a weaker signal which raises the noise floor and allows for more interference in an already noisy environment. If it was a 7-10w signal, I would probably try it.
As for the OTG-Y cable that redheadedrod mentioned, that's exactly how im going to power the unit. I have the 2013 model, which has some issues when both a USB device is attached and you try to charge it at the same time...even with the custom ElementalX kernel that is supposed to work. If I had purchased the 2012 Nexus 7, it's much more friendly to charging at playing at the same time. I hope that someone makes it as easy as the 2012 version for this.
Trouble deciding on car speakers? Clicky Clicky
My Myspace page (view my pics for carputer worklog...needs updated)
Speakers: DLS Ultimate Iridium 6.3 Link
Amplifier#1 (Front Stage): DLS Ultimate A4
Amplifier#2 (Sub) removed