Clarification on e70 audio system
 

I'm hoping this can be a good resource of information.

Based on my research I am discovering the following regarding the pre LCI e70, and want people to correct me on my conclusions.

Base
No amplifier in rear driver side panel
No Center Channel
Mid in front doors (No Tweeters)
Mid in rear doors (No Tweeters)
No speakers in cargo area
Woofers under front seats
Basic Treble/Bass adjustments

Hifi
Analog Amplifier in rear driver side panel
Tweeter and Mid in Center Channel
Tweeter and Mid in front doors
Tweeter and Mid in rear doors
No speakers in cargo area
Subwoofers under front seats
Basic Treble/Bass adjustments
http://www.xoutpost.com/attachments/...ard-audio-.jpg

Premium
Digital Amplifier in rear driver side panel
Tweeter and Mid in Center Channel
Tweeter and Mid in front doors
Tweeter and Mid in rear doors
Tweeter and Mid in cargo area
Subwoofers under front seats
Digital EQ adjustments
http://www.xoutpost.com/attachments/...ium-audio-.jpg

I'm curious - did anyone PM you with information?


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This is incorrect.

Base Stereo has tweeter grilles, but shine a light into them and you can see there's no tweeter back there.

You shouldn't call any underseat speakers "subwoofers" in any BMW, but the base Stereo cars it's really a misnomer.

There are 6 speakers in a base Stereo car, four 4-inch and two 6-inch. They look like this:

http://farm7.staticflickr.com/6122/6...d681668b_n.jpg

The signal coming out of the iDrive when it is coded for base Stereo mode is VERY odd.

The front signal is heavily boosted in the bass, and less so in the highs, to make up a bit for the missing tweeters and the missing 8" and the missing amp. The front channels drive the underseat speaker and the front door speaker. This is like a 9dB boost:

http://farm5.staticflickr.com/4023/4...f3b042e1_m.jpg

The rear output has the low bass filtered and the midbass boosted:

http://farm5.staticflickr.com/4054/4...89f314f2_m.jpg

We do have plug-and-play upgrades for the E70 with Stereo, if you're interested contact us. We've helped out a number of people in that situation.

I don't think there is a tweeter on any of the centers, either, 676 HiFi or 677 Top.

Good stuff.

el duderino knows his stuff! MusicarNW installs always look first class. I wish I was closer to them...kinda far for a road trip!

Thanks for the kind words, sir. If you need a referral to a great resource in Vegas, let me know.

Thanks for the information- Updated some of the information above to be more accurate.

I should pop my center channel speaker grill off again because I think I saw a tweeter.

Fun fact about the Stereo system in the E70 which does not apply to the E9x or E82 - when you fade all the way to the rear, the bass signal is still playing out of the fronts - the fader only attenuates the mids and highs on the front channels. Constant bass! This is cooler when upgrading.