huh? what does batteries have to do with it?
ive hit 148 on a termpro on the windsheild in a 96 gtp no back seat all below the window line....
180 amp alt
2 batteries in the tire well. (capicitors suck use a batcap)
10,000 watt ma audio amp 4400 rms @ .5 ohm mono. 24v supply from the batteries! (yes it handled it just fine, amp had digital voltage display so that was handy!)
2 12" ma audio hard kore subs getting 2200 rms each.
3/4 inch mdf doubled up 18inch L shaped ports box tuned to 38hz.
designed on some audio forum i dont remember what one. this was back in 2004 in high school lol.