built a battery rack for my yellow top d31 to sit on top of my deka. I tripple grouded my deka and used the machined posts as a d block for grounds and have two grounds to my seats that are grounded through to the chassis, two to a rear seat belt mount which also goes through to the chassis and two grounds up front to the chassis, and engine block. 4/6 of these grounds are in 2/0 and the rest in 1/0. I just ordered a us md3d and it should get pretty loud in my new box. I had a md1d previously and liked it hence why I bought the md3d.
Also decided on polk components and a kenwood head unit.
Polk Audio MM6501 - 6-1/2" Component Speakers System - Sonic Electronix
Kenwood eXcelon KDC-X794 (kdcx794) CD/MP3 Car Stereo Receiver
Can I bridge the components which are 2.7 ohms into the alpine mrp220? or would that ohm load be unstable?