[MCCoding]

Hi all, first time posting a question/thread here. I normally find what im looking for but it seems no1 is having a similar issue like me????

E92 WITHOUT hifi or logic 7 amp nor the wiring and harness in the boot/trunk area.

So i tapped into the front under seat subwoofers - i couldn't find a wiring diagram anywhere so for anyone else who is looking....:

Only 2 wires for each of the 2 subs

Front left
BLUE BLACK +
BLUE BROWN -

Front right
BLUE BLACK +
BLUE BROWN -

I then connected all 4 wires to a high to low frequency control thingy which rca out to the amp and box.

The issue is that the sound is VERY quiet!
Ive done all the tweaking still nothing...

To confirm its not the tweaking of the controls, I swapped the the rca input from the car to a rca lineout from my phone via a 3.5mm jack... and the sub was pounding the air as it should

So what is the issue/solution?

Thanks in advance