Oppgradering av anlegg i E90

[krizy]

Hei!

Jeg har en 2011 E90 som jeg har lyst å få litt bedre lyd i og tenkte å høre med dere om noen av dere har noen gode tips.
Først og fremst ønsker jeg å få en 2-din spiller, jeg har sett litt på Dynavin N6 her http://www.dynavin.com/products/n6_e9x.php, noen som har erfaring med denne?

Etter bytting av spiller, vil det være nødvendig å bytte ut originalhøyttalerne og muligens sette inn en sub? Har ikke tenkt å bruke så allverdens mye penger på dette, har bare lyst å få litt bedre lyd enn hva det er nå

[Tore Kn]

Mye info på nettet om dette tema, mulighetene du har avhenger litt av hva bilen er utstyrt med opprinnelig. 

Limer inn litt lesestoff om lyd i E90.

 

E9X Audio Background
Introduction
This document is intended to explain the different audio systems in BMW E90
sedans, E91 wagons, E92 coupes, and E93 convertibles. These audio systems
are major departures from the systems in E36 and E46 3-series vehicles, and the
potential for performance is much greater, if one is aware of the system specifics.
This document is not intended to advocate any one upgrade path versus another
– it is descriptive, not prescriptive. It does not address iDrive features.
Notes:
- This early version 1.1 is very US-centric and is only thru MY2011.
- This early version 1.1 does not attempt to cover M3 systems in depth.
A future draft will address these in more detail.
- Please pm suggestions to vp electricity on E90post.com.
Terminology
BMW uses two different vocabularies to refer to their various audio systems –
service terminology, and sales/marketing terminology.
From the service side, there is Stereo, Hi-Fi, and Top Hi-Fi.
From the sales and marketing side, there is Base Audio, Hi-Fi Audio, and
Premium or Logic 7 (starting in 2011, this changes to Premium “harman/kardon”,
and Logic 7 becomes only a setting in the harman/kardon system menu).
Note: The “Individual” system is available in M3 vehicles, and is available
as a special-order option in non-M E9x vehicles. From a service point of
view, its architecture is identical to the Top Hi-Fi, but different part number
speakers and amplifiers are used. It is VERY rare in US non-M E9x.
Base = Stereo = Business
Hi-Fi = Hi-Fi = Professional
Top HiFi = Premium, Logic 7 or harman/kardon, Individual
This document uses the service designators for simplicity.
V 1.1 Page 2 7/11/2010
U.S. Availability in non-M3 E9X vehicles:
Model Year Stereo Hi-Fi Top Hi-Fi
2006 NA Y Y
2007 NA Y Y
2008 NA Y Y
2009 NA Y Y
2010 Y NA Y
2011 Y NA Y

BMW Head Units
There are three levels of head unit: Business CD, Professional CD, and iDrive.
The Business CD has not been available in the US market as of this date.
Either the Professional CD Player or the iDrive system may be present in any
audio system. That is to say, which head unit is present does not affect which
audio system is present. A Professional CD Player may be present in a Top HIFi,
Logic 7 system, or in a Base Audio, Stereo system.
The head unit must be “coded” to operate properly with a given audio system.
This will be described in more detail in the System Architecture section.
MOST
MOST is a vehicle-specific protocol, which is different from other digital fiberoptic
standards such as Toslink. Other devices, such as Sirius tuners, Bluetooth
M-ULF modules, and iPod interfaces, also exist on this MOST network.
The head unit uses MOST to connect to other devices such as Sirius tuners
(when external to the head unit), iPod interfaces, and Bluetooth handsfree
modules. In addition, MOST is used only in Top Hi-Fi systems as an audio
connection between the head unit and the amplifier.
V 1.1 Page 3 7/11/2010
System Architecture
Stereo
A US-model Stereo system can be easily identified by looking at the top of the
door panel, inboard of the side mirrors. If there are no tweeter grilles present
there, the vehicle has Stereo audio.
The Stereo system consists of:
- A head unit coded to Stereo mode, providing speaker-level analog signals
- Front door 4” cone speakers using the standard BMW 3-bolt frame
- Rear 4” cone speakers (rear deck, doors, or sides, depending on body)
- Underseat 6” cone speakers with 8” frames, inverted-mounted in 8”
enclosures
These speakers are powered by a 4-channel amplifier IC inside the head unit.
The iDrive head unit has slightly more power than the Professional CD player,
but both are limited in performance and can be thought of as having similar
output as an aftermarket CD player.
To compensate for the lack of tweeters and of larger 8” subwoofers, the head
unit front speaker signal is heavily boosted in the bass and treble. This
equalization curve is fixed at all volume settings.
The front 4” door speakers and the underseat 6” speakers are both connected to
the front channels of the head unit output in parallel. The 4” rear speakers are
connected to the rear output channels of the head unit, and that signal is
crossover-filtered within the head unit with a roughly 150 Hz high-pass filter.
V 1.1 Page 4 7/11/2010
Hi-Fi
A Hi-Fi system can be identified by the presence of tweeter grilles at the top of
the front door, inboard of the sail panels, but without a center channel speaker in
the dashboard, and by simple bass and treble tone controls in the head unit.
A Hi-Fi system consists of:
- A head unit coded to Hi-Fi mode, sending front and rear balanceddifferential
preamp-level signals to the Hi-Fi amplifier
-
- A six-channel amplifier with equalization and crossover filters onboard
o 2 front channels, equalized and high-pass filtered at ~ 120 Hz
o 2 rear channels, equalized and high-pass filtered at ~ 120 Hz
o 2 subwoofer channels equalized and low-pass filtered at ~100 Hz
- Front 1” tweeters in mounting trim pieces, with series capacitors
- Front 4” midranges in the door (connected in parallel with the tweeters)
- Rear 1” tweeters and 4” midranges connected in parallel
- Underseat 8” flat woofers in enclosures.
The head unit sends analog front and rear analog signals to the Hi-Fi amplifier.
These signals are balanced-differential, and have a 5V maximum. They are not
processed, equalized, or crossover-filtered, other than a slight auto-loudness
feature which is not objectionable and should not be corrected. The subwoofer
channel outputs are derived within the amplifier from these signals.
The Hi-Fi amplifier is black in color, and is in the trunk or cargo area on the
driver’s side. In sedans and coupes, the amplifier is under a plastic cover which
snaps off. In wagons, it is behind the driver’s side rear cargo storage cover, and
under a plastic bolted-on cover.
The Hi-Fi Audio system has been called the easiest to upgrade, because the
balanced signal can be used by several good-quality aftermarket amplifiers,
because the signal from the head unit is not processed, and because the tweeter
trim is already present in the vehicle.
The E90/1 has the tweeters in on-axis mounts with some depth behind them. The
E92/3 have the tweeters slightly less on axis, and with no additional depth.
V 1.1 Page 5 7/11/2010
Top Hi-Fi - Logic 7 or harmon/kardon
The Top Hi-Fi system consists of:
- A head unit coded to Top Hi-Fi mode
o Sending optical digital audio signals over a MOST fiber-optic cable
o Displaying a 7-band user equalizer in its UI
o Allowing Logic 7 processing to be turned on and off
- A silver Top Hi-Fi amp (same location as Hi-Fi) with MOST fiber-optic
input, 9 channels of processed, equalized, filtered, time-delayed output
o 2 front channels
o 2 rear channels
o 2 rear effects channels
o 2 subwoofer channels
o 1 center channel
- A pair of front 4” and tweeters, connected in parallel
- A pair of rear 4” and tweeters, connected in parallel
- A pair of rear 4” effects speakers
- A pair of underseat 8” woofers
- A single dash-mounted 4” center midrange speaker
The purpose of Logic 7 processing is to create a sense of ambience, and to let
both front-seat passengers have a similar stereo experience. Its effectiveness in
this implementation is not a topic for this document. The technology is from the
Lexicon division of Harman International, and more on the technology can be
read here: http://www.lexicon.com/logic7/index.asp
Logic 7 systems use metal-diaphragm drivers. At this time the writer is not aware
of the composition of 2011 harman/kardon drivers.
Note: When a head unit is coded to Top Hi-Fi mode, its analog outputs are
inactive.
V 1.1 Page 6 7/11/2010