amp problems

[MillyS00 0]

My audiobahn 18001DT amp isnt getting enough power out of my car a 2000 Mazda Millenia S. The stock alternator is putting out 110 amps the amp is drawing 150 amps to put out 1800 watts to 2 12" audiobahn ultra excursion subs. I have upgraded the battery to a optima red top and have installed 2 1 farad caps. When i have the car running the amp recieves 13.5-14 volts when i have the bass turned all the way down. When i turn the bass up half way the voltage drops within 5 minutes to 11.5. I currently have 4 ga wire planning on upgrading to 0 ga to stop some of the voltage loss cause im running the wire 20 feet. should i upgrade the alternator or put more caps or a battery? also im planning on building a new box and i want these subs to be loud so any tips or advice woul;d be helpful.

thanks

My Millenia

[02BlackOnBlackSS 1]

Do the magic 3.

[AudioStylz 0]

Ok, your on the right track.

1, upgrade all the wire.

2, add a 2nd battery to help with the current demand

3, upgrade the alternator with 1 that is about 165-190A output.

Once you do all that, your amp should see the 14 volts all day long and you wont see any voltage problems later on even if you decide to upgrade to more power.