bypass having to buy a seperate alt etc charging system for running 16v in my car... pretty much.
I owned two of the step up transformers before and it worked well, sold them both as I sell/trade everything on here in a short while and that was the last I used them.
I mean if it'll end up being easier to do the alt in the end, it's what i'll do, just wasn't the original idea I was going for as i'd have to find someone who could fabricate brackets for dual alts and around here.... that's not something i'd trust people to do a decent/good job on. I'm surrounded by people who run sony/jl/kicker only and get it all installed at shops who port boxes by... drilling holes in them and the biggest wire they carry is 4 gauge.
or if you cant do multible alts do a 16v externally reulater and charge your 16vs then run a step down to a front 12v battery do at least 4 runs of 1/0 to a battery bank in back thenm hook the 2 powermaster step downs off the alt to the front battery then a 5th run for 12v for your highs amps 2 ground runs 2 16v power and 1 12v power sp0 5 totle runs and i would run cca to save money each run is good for 250 amps due to it being oversized and if you do this you should have a very solid charging setup