Currently I am using PAC ROEM-NIS2 with the headphone cable spliced in from the tablet to rear and front. This feeds a balanced signal to the factory Bose amp and slightly bumps the voltage but...it just isn't enough when all I have is the audio controls within the tablet itself. I would say the loudness when maxed out equals about a 14 on the stock system and at which point the audio begins to clip.
I just recently purchased a Clarion EQS746 which bumps the pre-amp voltage to 7v, allows aux input, sub woofer out with separate pre-amp adjustment and of course EQ control. I just have no idea where I will mount it lol
There is a big problem for me at least with android where that it cannot act as a bluetooth headset...in other words I cannot stream audio from my phone to the tablet and out the stereo. So this is where the aux input on the EQ comes into play. I also purchased bluetooth headset which has a 3.5mm out for use with headphones. I will use that for the aux input and plan on mounting it up top where the factory bluetooth mic is.
There is an app for android called Tablet Talk which allows you to connect your phone to your tablet and perform operations like SMS and initiate phone calls with out ever having to even look at your phone. But like I said earlier you cannot talk through the tablet if that makes any sense so you would then have to pull your phone out and put it up to your ear. So I will have my phone paired to the bluethooth headset and when a call comes in I can just press the aux button on the EQ and it will switch the sound from the tablet over to the headset where the call is coming in This could also allow anyone who rides in my car to connect to the bluetooth headset and play audio off their own device if they like.
O yeah and not really related but I'm also finally hooking up my sub! A alpine type R 500 watt mounted in a 4080 driver side enclosure. Just bought the amp and wires and will hook it up when I get the EQ installed.
User Interface / Apps
Tablet is far from where I would like it at a UI standpoint since I spent all my time focusing on just mounting the thing but I will work on that and update when I get a chance.
I read that a lot of people always jump to the conclusion that android is not a good interface for the car as far as lauching certain apps and icons being too small...android is almost completly customizable, its not a freakin iphone :P so I found this app called "Desktop Visualizer" Play store link that lets you make custom shortcuts on your homescreen to launch any application with a custom icon and can actually make the size of the icon much much bigger! check it out
Welp after trying out the EQ with the stock Blose amp I came to realize the bose amp is just a POS when trying to work with anything other than the stock head unit. So I completely trashed the Bose system and just upgraded the door speakers with some Polk MM6501 component speakers and a 2 channel Cerwin-Vega stealth amp. Was a little worried about not having any speakers in the rear but actually it sounds pretty awesome lol. I ran the extra RCA cables to the rear anyways in case I plan on upgrading at some point but for now I'm more than happy with the sound quality of this setup.
So as of now everything is functional and yes even the bluetooth, all I need to do now is figure out how to mount the EQ and bluetooth dongle and will close the book on this project for now. Still working on the tablet interface but I'll probably make a video at some point to showcase everything
I ended up switching to a Hifonics HFEQ for a couple of reasons...way better knobs on it with a bigger volume knob, higher pre-amp voltage, more flexibility with the LPF and HPF, and I can opt for red LED lights instead of that bright ass blue...after install it actually sounded a lot better than the Clarion so I'm glad I switched. Here are a few pics of all the hacking I had to do in order for it to fit in the cubby above the tablet:
As of now I cannot completely close the top of the cubby since the knobs stick out. I plan to cut out a hole in the cubby lid so when it's shut the knobs will still be accessible but flush with the lid and rest of dash.
The current home screen setup complete with shag carpet icons Currently running Cyanogenmod 9 which runs great! way faster than the stock rom...plus I installed an orange theme to match my interior lights.