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      08-26-2010, 11:50 AM   #1
akhter
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e90 10 speaker HiFi stereo upgrade

I have a 2010 325i with base stereo (not harman kardon or Hifi) and idrive+hifi professional.

This is not a US spec car.

I believe this means I have 5 speakers (4 midrange/tweeters) and one sub under driver's seat and a built-in 4-ch amp.

I want to upgrade the amp (or add some) and all speakers/subs.

1) Does anyone know if its easy to get a line out?

2) All threads seem to be about upgrading HiFi loudspeaker or H/K surrond sound which are offered in NA cars. any pointers on upgrading this base system?
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      08-26-2010, 12:11 PM   #2
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The base Stereo system is similar in most countries, it seems.

That one-speaker system has been seen in the EU as well.

The signal out should be the one described here, I bet:

http://www.e90post.com/forums/showthread.php?t=395987

So you either need to recode the HU to Hi-Fi mode, converting the HU outputs to a lower voltage and turning off the internal processing, or you need an external speaker-level-input reversing processor.

Basically, you need a processor like an Audison BitOne or a RF 360.2 or a JL CleanSweep or a JBL MS-8 - or you need a manual DSP device and an installer who's really skilled and has great test gear.

We use Zapco DC amplifiers a lot. The MS-8 probably isn't available in HK yet, but a lot of people use those, add a center channel.

If you recode it to HiFi mode, buy the missing tweeter flanges, then you're set.
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      08-26-2010, 10:25 PM   #3
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What is the preferred method? Recode or DSP? Even if you recode, won't you still need an amp to run upgraded speakers?
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      08-26-2010, 10:28 PM   #4
akhter
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some good news--the dealer told me i have the 10 speaker hifi. I guess that is the same hifi as NA models.

Quote:
Originally Posted by VP Electricity View Post
If you recode it to HiFi mode, buy the missing tweeter flanges, then you're set.
I am guessing then I don't have to do the above so does it make the upgrade significantly easier? budget is about 2k USD...
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