because most amps nowadays are non-regulated, that means the amp will make more power with higher voltage... And that's why... The amp has some basic limits- AC voltage output can only go so high before it clips... AC current will output the same as AC voltage if outputting at a real 1 ohm load. The amp will draw what it needs to current-wise to produce a certain amount of power... But nothing changes here, if the actual load is below 1 ohm, current output will be at a dangerous level. Risk frying things from moving too much current inside the amp. So.. from what i'm getting at is- Running a higher DC voltage input at your amp will make it more efficient, but doesn't make it magically stronger over a 14v system. Now, if we were comparing daily driving at 10v vs 16v.. then yea, that's different. However, blabbing about all that.. a good electrical system can run many of today's amps at 0.5ohms. Not saying you will be ok because i don't know how you will monitor your setup.. But sundowns, AQs, Crescendos, DCs, American Bass VFLs- they all are built strong enough to withstand that stress... BUT it depends on how you stress it! Take me for example. I run at 0.5ohms but i do not crank it for more than a few seconds at that level. I don't want the actual load to be pegging at or below 1ohm for any measurable length of time. So.. if you want to wire below the stable load- I only do it for competition and loud demoing. For only daily driving, it's pointless. Wiring low is for numbers. Wiring normal is for enjoyment.