csg78
Posts: 4
Joined: Sat Jan 02, 2021 1:38 pm

Re: Need to upgrade sound

Sun Jan 03, 2021 10:57 am

eXodus wrote:
Sun Jan 03, 2021 8:09 am
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
Posts: 135
Joined: Tue Dec 22, 2020 6:06 am

Re: Need to upgrade sound

Sun Jan 03, 2021 4:47 pm

So this is my test setup:
Image

This is the door of the i3:
Image

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


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
Posts: 135
Joined: Tue Dec 22, 2020 6:06 am

Re: Need to upgrade sound

Sun Jan 03, 2021 5:04 pm

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
Posts: 4
Joined: Sat Jan 02, 2021 1:38 pm

Re: Need to upgrade sound

Thu Jan 07, 2021 11:53 pm

eXodus wrote:
Sun Jan 03, 2021 5:04 pm
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
Posts: 135
Joined: Tue Dec 22, 2020 6:06 am

Re: Need to upgrade sound

Fri Jan 08, 2021 3:51 am

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 :P

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

eXodus
Posts: 135
Joined: Tue Dec 22, 2020 6:06 am

Re: Need to upgrade sound

Sat Jan 30, 2021 7:59 am

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.

Image

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

kutzsche
Posts: 1
Joined: Sun Feb 21, 2021 9:30 pm

Re: Need to upgrade sound

Sun Feb 21, 2021 9:32 pm

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 ?

peterb
Posts: 1
Joined: Thu May 06, 2021 3:12 pm

Re: Need to upgrade sound

Thu May 06, 2021 3:32 pm

Hi eXodus:

This is great work. I am not an audio expert, and my demands are low, but I'd like to improve the audio in my i3 for the back passengers.

My idea are simple 4ohm 30w speakers like:
https://www.amazon.de/Uxsiya-tragbares- ... B08N427TM4

and put these simply under the back seats, left and right, near to the floor. Essentially behind the feet of the rear passengers.

I recognize that there they are not ideally positioned for sound, but their obscure position makes it also less crucial that the speaker integration looks as awesome as the i3 interior.

Nor are these speakers high quality; but they are small, black and easily attachable on top of anything that one can punch a hole in; and that is certainly true for the softish cloth material there.

question 1:

Is this a bad idea for some reason?

question: 2

The picture of your speakers in the head unit you posted is awesome, but it is not completely visible for me in which contact you exactly put the wires (in parallel with front speakers). Could you clarify?

Thanks so much for any response!! Once again, this seems a simple way to fix the complete lack of audio in the back..

Peter

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