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I have a 2010 E60 535i with Hifi (USA)
My front and rear speakers are powered from the head unit and the underseat subs are powered by a small amplifier in the trunk (boot) on the left side (tweeters in front sail panels, mids in doors, speakers in rear deck, underseat 8” ‘subs’)
I’ve tapped into the low level wires in the harness and made RCAs to provide signal to a new subwoofer amplifier…
But I would like to see a wiring diagram for this setup so I can tell which wires are which for future reference… (found the low level left and right, and the turn on lead which were all I needed at the time)
I want to eventually amplify the rest of the system and I’m looking for an ‘easy’ route even if it’s a small 4ch 75 x 4… and I wouldn’t mind giving some more power to the underseat ‘subs’ and running them as a true midbass driver
Thx!!!
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