a 1 or 1.5 farad cap would almost or totally eliminate the power draw issues. Basically you need .1 farad per 100W. the smallest caps are around .5, or 500W. You need a minium of a 1 farad, but theres nothing wrong iwht overkill either. Im only pushing around 900W with a 1.5.
They install between the amp and the battery and the amp draws power from the cap and battery simultaniously. When the battery can't keep up, the cap kicks in and sends more juice, so you end up with a higher battery charge and a less stressed alternator.
I used some of the factory CD changer brackets and modified them and made a custom mounting bracket for mine.
<span style='color:gray'><span style='font-family:Courier'>1995 e36 3 Series RIP
1999 e46 3 Series BURN IN HELL
2000 MR-S Roadster= Current</span></span>