[bodybump]

quick question for to those who have done it...is it possible to add amp,sub and tweeters to my bmw without changing the stereo? will it make a big difference in sounds? was planning to add 1 sub add tweeters and add mids and amp using the stock stereo...Reall appreciate it guys!! Thanks!!

[ctuna]

http://www.e90post.com/forums/showthread.php?t=641323

What you put in will depend on which of the three systems offered
is in your car and if its a coupe or 4 door . It has nothing to do with the Head Unit name. Read the links to find out what you have.

The base system requires processor or frequency flattening device
The middle system called Hi Fi is easiest to modify
The L7 called the HK or Top Hi Fi is more difficult to modify because
of the fiberoptic connection between the amp and head unit and the number
of channels (9).

BMW stereo types
http://www.e90post.com/forums/showthread.php?t=352586
http://www.e90post.com/forums/attach...2&d=1266451970
http://www.e90post.com/forums/attach...2&d=1260829447
http://www.e90post.com/forums/showthread.php?t=343673
http://www.e90post.com/forums/showthread.php?t=138949
http://www.e90post.com/forums/attach...2&d=1260829447
http://www.e90post.com/forums/attach...1&d=1209780605
http://www.e90post.com/forums/attach...1&d=1209780865
http://www.musicarnw.com/page-2/
http://www.e90post.com/forums/attach...4&d=1278871872

The difference in sound will depend on what you start with .
It will be big for the first two systems and better than the Top Hi Fi (l7)
but it won't be cheap because almost none of the normal Hi Fi
shop stuff fits . The stuff that does fit is really good but not cheap.

[bodybump]

Originally Posted by ctuna

http://www.e90post.com/forums/showthread.php?t=641323

What you put in will depend on which of the three systems offered
is in your car and if its a coupe or 4 door . It has nothing to do with the Head Unit name. Read the links to find out what you have.

The most base system requires processor or freqeuncy flattening device
The middle system called Hi Fi is easiest to modify
The L7 called the HK or Top Hi Fi is more difficult to modify because
of the fiberoptic connection between the amp and head unit and the number
of channels (9).

BMW stereo types
http://www.e90post.com/forums/showthread.php?t=352586
http://www.e90post.com/forums/attach...2&d=1266451970
http://www.e90post.com/forums/attach...2&d=1260829447
http://www.e90post.com/forums/showthread.php?t=343673
http://www.e90post.com/forums/showthread.php?t=138949
http://www.e90post.com/forums/attach...2&d=1260829447
http://www.e90post.com/forums/attach...1&d=1209780605
http://www.e90post.com/forums/attach...1&d=1209780865
http://www.musicarnw.com/page-2/
http://www.e90post.com/forums/attach...4&d=1278871872

The difference in sound will depend on what you start with .
It will be big for the first two systems and better than the Top Hi
but it won't be cheap because almost none of the normal Hi Fi
shop stuff fits . The stuff that does fit is really good but not cheap.

Thank you so much ill take a look on this..

[Kannu]

Hello from Finland!

This is my first post to the forum so try to bear with me...

I would like to update my E90 base stereo, but after 7h of reading this forum it appears it's a bit more difficult than i predicted. For the record, i have Idrive + professional nav, if that changes anything.

The parts that i would like to add are: (suggestions)

- amplifier for front speakers + "subs" under seats (Blaupunkt THA-475)
- 2-way front speakers (DLS R4)

+ I'm also going to need the adapters mentioned here:

http://www.e90post.com/forums/showth...ht=amp+upgrade

Questions:

- Will this work? For example are the subs' imbedances suitable for the amplifier when connected this way? I would like to drive the rear speakers with to HU's amp. (this isn't necessary)
- What about the speaker cables? Do I need to draw new cables from the amplifier or can i somehow use the existing ones?
- What else do i need to consider?

I'm aware of the HU EQ problem, which isn't my biggest concern at the moment.

Any ideas / suggestions?

[ctuna]

http://www.e90post.com/forums/showthread.php?t=641323

Ignoring the eq on the head unit is a big mistake.
Driving aftermarket speaker with the head unit is a big mistake
they barely have enough power for the speakers that are in there now.
Leaving the rears on the head unit should be OK

That's a 4 year old post you are looking at there are better solutions
now but there not cheap.

[Kannu]

Yeah, i've read that page. The only problem is, that many of those systems cost too much. I'am not looking for the best solutions, just an <1000€ update for the previous system.

I haven't found any information about wiring-diagrams of the oem speakers and that's why i'm a bit loss connection wise. I can't also pm anybody, cos I'm a newbie here.

Anyways, our roads here are so rough, that there isn't any point searching for the best sound, it's always ruined by tire noise when driving.

Just looking for that one fellow, who could point out exatly what i need (we must remember that marks may vary a bit here in Europe), i could figure out the rest myself.

[ctuna]

The front speakers are all in parallel
I have seen pictures of some of the installs of the split in the
kick panels.
There is an Alpine kit offered by BMW that adds and Alpine amp and
upgrades the fronts and the underseats I think.