Tell us about yourself!
That's great! What software are you using on the Rpi? I am (slowly) designing a new system to fit in the cargo space on a Bullitt and I'll need a crossover which can be adjusted once the box is built. Also, I have had a lot of success with the Sure Electronics 48V boost converter. It enables the amps to run off 48V and as the batteries discharge the voltage supplied to the amps doesn't drop so you get constant volume. You could have a single, large 12V battery and it would work fine.http://store3.sure-electronics.com/ps-sp12151
Excellent! And you are towing it with a Bullitt, my favourite bike! Where is that?