Need to upgrade sound

[csg78]

at least the signal to the woofers is filtered.

BUT it works - got nice sound with the speakers sitting on the floor in the back. getting some pictures.

Woofers exactly don’t need to filtered, because speaker coil can do that.
Mid-High speakers needed because low frequency can damage the not enough strong woofer.

That is a really good news! Sound was not much louder?
Please test it more, HU was not so hot?

Then we must just figure it out how can make a hole on rear door panel..

[eXodus]

So this is my test setup:


This is the door of the i3:


This is from the panel the inside - it's like easy to see where the speaker hole should go.



The speakers sitting on the floor - the sound in the car already felt better - more all around and fuller.

I'm not sure if I will need the tweeter - will be hard to find a spot for those. - at least in the front it didn't make a big difference. Maybe for the rear seat passenger.

[eXodus]

Next steps:

1. Get a better Multimeter and measure what Ohm the parallel connected speakers have
2. Test-run the system on the rear set and see for heat issues.
3. Find a way to bring a cable into the doors.
- the doors have a plug at the frame - so either need to add two pins to that or get a door wiring harness from an i3 with HK-System.

[csg78]

Next steps:

1. Get a better Multimeter and measure what Ohm the parallel connected speakers have
2. Test-run the system on the rear set and see for heat issues.
3. Find a way to bring a cable into the doors.
- the doors have a plug at the frame - so either need to add two pins to that or get a door wiring harness from an i3 with HK-System.

Any update?
I’d like to do the same thing.

[eXodus]

Found a Multimeter, going to try it again this weekend.

I know the door side of the wiring good by now - the issue is the part from the Headunit to the connector in the door frame - Have to remove the trim pieces on the rear bench.

But no idea where to start, currently scouting ebay for the parts which need o be removed to see where the clips are on the back. Don't want to break things

BMW tends to do like 3-4 clips on a part - and then one or two screws.

[eXodus]

I have not found a way to get to the back of the plug for the door cable.

Yet I found a work around - just adding a second cable in the door jam.



Maybe not the most pretty solution but in the rear doors - it shouldn't matter.

[kutzsche]

Hi guys,

I had exactly the same idea. I replaced the front speakers with Bavsound and now want to put the original door speakers in the rear door. My plan was to connect them in parallel as well. Were you able to find a way to route a new cable through the door connector to the HU and if so how ?