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BMW 3-Series (E90 E92) Forum > BMW E90/E92/E93 3-series General Forums > Regional Forums > UK > UK Technical Forum > Does my E90 have an OEM amplifier?



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      12-11-2011, 02:52 AM   #1
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Does my E90 have an OEM amplifier?

Hello guys,
Does anyone known if my basic system in my E90 has a amplifier anywhere and if so where??
I don't have the upgraded system, I have the following:

2x rear parcel shelf speakers.
2x subs under front seats.
2x speakers in front door

I do not have the centre speaker in the dash.

I know of the upgraded systems have the amp in the boot when you lift the spare wheel (storage) cover.

Does anyone know if I have an amp and if the answers Yes, Where exactly is it located
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      12-13-2011, 05:24 AM   #2
AdrianSi
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The general way to tell if you have the external amplified Hi-fi or Logic7 system is if you have front tweeters, and on pre LCi e90s you will have rear door speakers also. You will have the base system which is not amplified externally to the head unit. This has been covered quite a few times in the past and three are some good official BMW docs that have been posted.

Exceptions are Business loudspeaker, which adds front tweeters only... Still not externally amped. There are wattage differences between professional and business headunits, likewise with professional and business Nav units.
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      12-13-2011, 06:06 AM   #3
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The BMW business system does have an external amplifier. Only the standard system uses the head unit for amplification.

To the OP, you don't have any external amplification on your system.
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      12-13-2011, 01:49 PM   #4
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Guys, thanks for all your help and comments! Will save me some time not having to look for the amp now.
Can get on with installing my 4" speakers and amp to run them with.
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