Help Bad voltage drop

[Bayler 0]

Hey guys I’m new to this forum but I will just get straight too it I have 2 svr12s from Skar and the rp1500 from Skar too it’s rated for 1500rms and 2300max I have my system wired at 1 ohm as it recommends and have done the the big three and have a 200amp high output alternator and a dual battery setup with 0awg going from the front battery to the back battery and I’m still having a bad voltage drop when I play music wondering what else I could do to fix it, it will drop down to 12.4v and will slowly get lower if I’m playing a continuous bass type of song and it’s an older car 1989 cutlass Calais idk if that would anything to do with it any thank you 

Edited May 22 by Bayler

[Aaron Clinton 2,372]

Welcome to SSA.

[jcarter1885 995]

 

What brand alternator and batteries?