I agree with keeping everything the same brand. Mine is all Pioneer. DEH-5800MP deck, 4x6's in the front, 6x9's in the back, 800 watt amp and 2 800 watt subs. I rewired my car too. It wasn't as bad as I thought it would be. Took all of an hour...

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1981 300 SD 213k miles "Stock for now"
1999 Super Duty 7.3L 113k miles
1981 300 SD 180k miles "Heavily modified" SOLD