adding a second battery

im willing to go with this upgrade (big 3), but wouldnt it drain/alt.? my main battery is stock (Duralast X]). and a 70-80 amp alt.

imupabove wrote: im willing to go with this upgrade (big 3), but wouldnt it drain/alt.? my main battery is stock (Duralast X]). and a 70-80 amp alt.

Why...Why...Why...Why...? Where is this coming from...You are simply upgrading the factory wires to a bigger gauge...Why would it drain anything...? Is it draining it now...?

M.E.C.P & First-Class

Go slow and drink lots of water...Procrastinators' Unite...Tomorrow!

pretty much. my EQ light knobs dim the most. but my headlights for some reason dont dim "alot". i do i have a 1 farad RF cap.

I recently installed a system in my Corolla. After being away from car audio for 25+ years there is much to learn. After completing the Big3 I noticed no more engine noise and slight improvement on voltage to the amp. Your alternator is not fighting the resistance of those small factory wires. My headlights still dimmed but not too bad. So, I installed the recommended 1/0 power cable to the amp and this made an even greater improvement on my headlight dimming. I still need to upgrade the alternator. Completing the Big3 will give you a good foundation to build whatever system you plan on running, plain and simple. It's not as bad as it seems, just take your time and make sure you solder all your copper lugs. It was time and money well spent.