E9X audio systems defined

VP Electricity · 02-17-2010, 10:18 AM

The E9X as of this date has three main levels of audio system, plus another only found in the E92 in M3 trim.

Please note that the in-dash "head unit" does not define the audio system connected to it. There is not a "Professional" audio system - just a Professional head unit. Ditto iDrive.

Any external audio sources - sat radio, iPod, AUX, nav, or Bluetooth - all come into the head unit and then come out the head unit to the amps. When the OEM amp is bypassed, all these functions continue to work just as they did before.

Speaker provisions

The E9x cars have the following speaker provisions:

Front door 100mm midranges (with limited depth and magnet diameter, ESPECIALLY in the E92). The speakers attach via threaded studs on the backside of the door panel. Theses do not correspond to any standard speaker screw patters (there are only three of them) but adapters can be used. I put 50mm as a good rule of thumb for E90/E91. I need someone else to supply E92/E93 data.

Front door tweeter in mirror sail, with interesting mounting. The opposite side tweeter is on axis to the listener, and the same-side tweeter is only about 30 degrees off axis, so many auto-intended tweeters with rising frequency responses on-axis (in an attempt to have a flat response off-axis) can have raspy or tinny sound. Some aftermarket tweeters snap into the BMW mounting tabs, and a 45mm outside diameter tweeter housing seems to be the absolute widest that can do this.

Wiring - the mid and tweeter are connected in parallel with only a single set of speaker wires going into the door.

Positioning - the front mid and tweeter are equidistant from the listener's ear.

Base audio

The "base" audio system has been around since the early days, although it only made it to the US in 2010.

It uses four channels of deck power (yes, that's right, good old 50Wx4 when lightning strikes, 18Wx4 if you're charitable, and 12Wx4 if you do the actual 12V math into 4 ohms and 1% THD).

The front channels drive:

- 6.5" woofers underseat in 8" frames and molded plastic enclosures. The underseat enclosures are identical for all systems. There is uncertainty regarding whether the duct connecting the enclosure to another chamber in the frame is actually a tuned port, or simply a funny-shaped sealed box. The woofer is not crossover-filtered. The only things taking mids and highs out of the audible output are the driver's own mechanical rolloff, and the acoustic filter formed by the seat and your rear end.

-4" mids in the door. These have a capacitor on them, acting as a high-pass crossover filter and also making the two-speakers-in-parallel a load the deck can handle.

The signal is heavily equalized to the front speakers, and has a subsonic filter around 40 hertz.

The rear channels drive only a pair of 4" mids in the back. This channel is high-pass crossover filtered around 160 Hertz, so connecting a subwoofer to it is a disappointing experience. It is also heavily equalized.

There is a low-current-output remote turn-on present with base audio systems, but it's not controlled by the radio play state. It turns on when the doors are unlocked and stays on for a while after ignition is turned off.

HiFi or Premium system

Some US folks call this the "base" system since it was the entry-level audio offered in the states until MY2010. This is a US-centric POV, though, and for clarity, let's call it the HiFI system.(It's HiFi in the service docs and Premium in the marketing lit).

This system is the easiest to perform performance-minded upgrades with, since it has flat, full-range analog outputs (two pair, front and rear). The processing and crossover-filtering happens in the HiFi amplifier (in the trunk, L rear corner, under the plastic snap-off plate in sedans and coupes, behind the cargo door and under a plastic bolt-on guard in wagons. There is a remote turn-on wire present at the amplifier, similar to the base audio system in operation.

Speakers

Front door mids and tweeters (highpassed between 100 and 160)

R door or deck mids and tweeters (ditto)

Underseat 8" flat woofers (low-passed around 100 to 160 with significant stopband output)

There is no center channel, and no rear effects speakers.

Logic 7

Logic 7 is a Harman-owned technology which was supposed to be marketing to record companies for them to use when recording stereo recordings to make them sound like surround sound. In the Logic 7 information online, there is about a paragraph about using the technology to play stereo recordings and make them sound like surround sound, even if they haven't had Logic 7 technology used in their production.

To many of us, two-channel stereo works great, and music is usually recorded to reproduce the effect of the performers being in front of you, not surrounding you, so the effectiveness of Logic 7 is debatable. BMW has announced that in 2011, L7 is being replaced by the good old "harman/kardon" badge from the E36/E46 days. (No word on hardware changes).

The Logic 7 amplifier is a 7.1 or 7.2 channel amplifier:

- front mids and highs

- rear mids and highs

- rear effects mids and highs

- center channel

- one or two channels for the underseat woofers

Early versions of the Logic 7 system used metal-piston drivers. Supposedly various production dates sound better and worse.

The Logic 7 amplifier is supplied a digital signal via a fiber-optic cable using the Multimedia Optical System Transport protocol, or MOST. No analog inputs.

There are three options for those wishing to upgrade the amplification in a Logic 7 system:

1) Use a summing and -de-equalizing device.

2) Use some not-yet-commercially-available in the States MOST audio gateways.

3) Recode the HU to non-Logic 7, activating its analog outputs, repin the HU connector, and ta da. (Your graphic equalizer in the HU will disappear and be replaced by good old bass and treble controls).

I'd like someone else to cover the M3 system, as I'm unfamiliar - and please supply suggestions for this, thanks.

Lee Rambler · 02-17-2010, 11:53 AM

nice!

needs stickied....

wareagle900 · 02-17-2010, 12:08 PM

what are the rear effects speakers in the l7? are they the speakers in the rear deck? and are there component or coaxial speakers in the rear?

Technic · 02-17-2010, 12:30 PM

Individual Audio/Enhanced Premium Audio System/SA 752

- same OEM speaker configuration as the Logic7 system, but with 16 speakers (14 in Convertible) instead of 13, by the use of coaxials in the center and rear panel 4" drivers. All speakers are upgraded with higher quality hexacones diaphragms and neo magnets; 4" drivers and coaxials are 4 ohms, tweeters are 7 ohms, woofers are 4 ohms. Front door components have a separate passive crossover network at each door. Other components have a capacitor inline.

- same OEM amp configuration (MOST, 9-channel output) as Logic7 system but with 825W max power (vs 420W) and DIRAC Live processing (vs Harmon Kardon). Stereo and Surround modes, 7 band EQ features.

Lee Rambler · 02-17-2010, 06:13 PM

bmw tis on the systems in 1 and 3 series

wareagle900 · 02-18-2010, 06:08 AM

Heres a good article on what "parrallel", "series", etc wiring are.

http://www.termpro.com/articles/spkrz.html

fdriller9 · 02-18-2010, 03:49 PM

Nice Write up...we should get this, mine, and some other of the threads stickied...like the ultimate subwoofer guide.

VP Electricity · 02-18-2010, 04:20 PM

I strongly suspect others have covered this topic in the past. I'm not exactly clear what it takes to get something stickied on this forum section.

Sirrus · 02-18-2010, 05:08 PM

I'm guessing contact one of the forum moderators:

shragon, stressdoc, KL2DC, Mr. 5, BoostedBMW, ybbiz34, Bimmer335i07, longtran, E92Fan, vivekk, BK

Or an Administrator?

hjvelez · 01-10-2012, 02:58 PM

No answer on the mounting depth on the E92/93 doors?

Herakles · 04-01-2016, 05:23 AM

Would a bavsound upgrade for a 2011 335 sedan hifi be a marginal improvement ?

I don't want to spend so much money on speakers if they are not much better ...

I was thinking of starting with speakers first and see if im content before I go to amp and subs

ctuna · 04-01-2016, 01:17 PM

Better to change the amplifier
In the case of the Hi Fi.
Not many people in the US upgrade from L7 to Individual
amp or that many in Europe either based on the posts here.

Ao1 · 04-01-2016, 01:43 PM

Sorry to repost from another thread, but hopefully I will get a reply in this thread.

Is the Individual amp a straight swap for the HK amp and would it OK to still use the HK speakers? if so would it provide a good sound upgrade?

Thanks in advance.

ptpending · 04-01-2016, 01:53 PM

no, individual amplifier pump twice as much power as HK amp to the speakers

Ao1 · 04-03-2016, 04:27 AM

I got a 2013 M3 in January with HK. The sound quality is just below par for my liking, mainly due to a lack of bass and general richness of sound.
In my old car I was using Logic 7 subs, Individual speakers and the Bimmertech amp and I was really pleased with it, which leaves me with a dilemma.

Upgrading to the Bimmertech amp is not an option. I would like to keep the car O&M as far as possible so upgrading to an Individual amp and speakers would be the best option in that regard, however the price second hand when they come up is way too expensive when you consider the cost of aftermarket options and the fact that they are typically 3 to 6 years old.

My options are therefore:
Upgrade door and subs with aftermarket and keep the Logic 7 amp.
Focal 100 KRS/ Earthquake SWS - Around £450
Upgrade to Individual amp and Individual speakers (as far as I know a straightforward swap)
Last for sale seen at £1,000, and 7 years old 
Upgrade door and subs and amp with aftermarket amp
Focal 100 KRS/ JL Audio XD500/3/ Earthquake SWS – Around £830.
Upgrade speakers to JEHNERT FLAT-Line Woofer, High-End-midrange and Softdome-tweeter and keep the Logic 7 amp - around £420

The Individual amp and speakers would be my preferred choice in terms of keeping the car OEM, but I’m struggling to justify spending around £1,000 for a second hand system. JEHNERT seems a good option that would provide a good upgrade an minimal installation work.

invaz · 06-22-2016, 09:17 AM

Thanks! Very informative!

Ryanrs · 07-01-2016, 01:53 PM

Hi

I have a 2010 LCI e93 325d msport. I believe HIFI stereo on pro business idrive w/bluetooth streaming.

It has a speaker in each door and L + R in the rear, no center or tweeter speakers. There is a sub under both front seats.

I stripped the rear LH trim off from the boot (trunk) and there is No amplifier in there! on the rear RH there is the battery and removing the boot floor trim reveals a grey electronics box with what looks like can bus wiring, doesn't look audio related.

Could anyone else give some clues as to where else the sub Amplifier may be?

Many thanks

Ryan

ctuna · 07-01-2016, 11:24 PM

328135M · 04-17-2020, 05:51 PM

Did you ever learn the answer to this question? I have the same question and have not been able to find an answer

Quote:

Originally Posted by Ao1

Sorry to repost from another thread, but hopefully I will get a reply in this thread.

Is the Individual amp a straight swap for the HK amp and would it OK to still use the HK speakers? if so would it provide a good sound upgrade?

Thanks in advance.

Aj6543 · 07-12-2020, 09:06 AM

Bump. Looking for the same answer. Also where can I buy the individual amp and speakers?

ptpending · 07-13-2020, 08:57 AM

Quote:

Originally Posted by Aj6543

Bump. Looking for the same answer. Also where can I buy the individual amp and speakers?

individual audio amp will blow logic7 speakers
parts available from ebay
for the parts reference list and pictures you can dig my SELL topics here
i've sold few kit some time ago

erhanuzun28 · 07-14-2020, 03:54 PM

Hi all,

I have BMW 325D 2010 model e90 saloon with base sound system. No factory fitted amp/cd changer etc.

I decided to upgrade the sound, bough AUDISON 8.9 BIT which has optical fibre sound input. I found fibre optical cables(2 pieces) come from BMW professional radio head unit. I bought and installed after Market Android iDrive, as instructed i moved fibre optic cables from head unit to iDrive.

My question is can I use that fibre optic cables from car trunk to connect sound to AUDISON AP8.9

Could you please advice?
thanks in advance

02-17-2010, 10:18 AM	#1
VP Electricity Brigadier General 289 Rep 3,201 Posts Drives: F34 xDrive Join Date: Jan 2008 Location: portland oregon iTrader: (3)	E9X audio systems defined The E9X as of this date has three main levels of audio system, plus another only found in the E92 in M3 trim. Please note that the in-dash "head unit" does not define the audio system connected to it. There is not a "Professional" audio system - just a Professional head unit. Ditto iDrive. Any external audio sources - sat radio, iPod, AUX, nav, or Bluetooth - all come into the head unit and then come out the head unit to the amps. When the OEM amp is bypassed, all these functions continue to work just as they did before. Speaker provisions The E9x cars have the following speaker provisions: Front door 100mm midranges (with limited depth and magnet diameter, ESPECIALLY in the E92). The speakers attach via threaded studs on the backside of the door panel. Theses do not correspond to any standard speaker screw patters (there are only three of them) but adapters can be used. I put 50mm as a good rule of thumb for E90/E91. I need someone else to supply E92/E93 data. Front door tweeter in mirror sail, with interesting mounting. The opposite side tweeter is on axis to the listener, and the same-side tweeter is only about 30 degrees off axis, so many auto-intended tweeters with rising frequency responses on-axis (in an attempt to have a flat response off-axis) can have raspy or tinny sound. Some aftermarket tweeters snap into the BMW mounting tabs, and a 45mm outside diameter tweeter housing seems to be the absolute widest that can do this. Wiring - the mid and tweeter are connected in parallel with only a single set of speaker wires going into the door. Positioning - the front mid and tweeter are equidistant from the listener's ear. Base audio The "base" audio system has been around since the early days, although it only made it to the US in 2010. It uses four channels of deck power (yes, that's right, good old 50Wx4 when lightning strikes, 18Wx4 if you're charitable, and 12Wx4 if you do the actual 12V math into 4 ohms and 1% THD). The front channels drive: - 6.5" woofers underseat in 8" frames and molded plastic enclosures. The underseat enclosures are identical for all systems. There is uncertainty regarding whether the duct connecting the enclosure to another chamber in the frame is actually a tuned port, or simply a funny-shaped sealed box. The woofer is not crossover-filtered. The only things taking mids and highs out of the audible output are the driver's own mechanical rolloff, and the acoustic filter formed by the seat and your rear end. -4" mids in the door. These have a capacitor on them, acting as a high-pass crossover filter and also making the two-speakers-in-parallel a load the deck can handle. The signal is heavily equalized to the front speakers, and has a subsonic filter around 40 hertz. The rear channels drive only a pair of 4" mids in the back. This channel is high-pass crossover filtered around 160 Hertz, so connecting a subwoofer to it is a disappointing experience. It is also heavily equalized. There is a low-current-output remote turn-on present with base audio systems, but it's not controlled by the radio play state. It turns on when the doors are unlocked and stays on for a while after ignition is turned off. HiFi or Premium system Some US folks call this the "base" system since it was the entry-level audio offered in the states until MY2010. This is a US-centric POV, though, and for clarity, let's call it the HiFI system.(It's HiFi in the service docs and Premium in the marketing lit). This system is the easiest to perform performance-minded upgrades with, since it has flat, full-range analog outputs (two pair, front and rear). The processing and crossover-filtering happens in the HiFi amplifier (in the trunk, L rear corner, under the plastic snap-off plate in sedans and coupes, behind the cargo door and under a plastic bolt-on guard in wagons. There is a remote turn-on wire present at the amplifier, similar to the base audio system in operation. Speakers Front door mids and tweeters (highpassed between 100 and 160) R door or deck mids and tweeters (ditto) Underseat 8" flat woofers (low-passed around 100 to 160 with significant stopband output) There is no center channel, and no rear effects speakers. Logic 7 Logic 7 is a Harman-owned technology which was supposed to be marketing to record companies for them to use when recording stereo recordings to make them sound like surround sound. In the Logic 7 information online, there is about a paragraph about using the technology to play stereo recordings and make them sound like surround sound, even if they haven't had Logic 7 technology used in their production. To many of us, two-channel stereo works great, and music is usually recorded to reproduce the effect of the performers being in front of you, not surrounding you, so the effectiveness of Logic 7 is debatable. BMW has announced that in 2011, L7 is being replaced by the good old "harman/kardon" badge from the E36/E46 days. (No word on hardware changes). The Logic 7 amplifier is a 7.1 or 7.2 channel amplifier: - front mids and highs - rear mids and highs - rear effects mids and highs - center channel - one or two channels for the underseat woofers Early versions of the Logic 7 system used metal-piston drivers. Supposedly various production dates sound better and worse. The Logic 7 amplifier is supplied a digital signal via a fiber-optic cable using the Multimedia Optical System Transport protocol, or MOST. No analog inputs. There are three options for those wishing to upgrade the amplification in a Logic 7 system: 1) Use a summing and -de-equalizing device. 2) Use some not-yet-commercially-available in the States MOST audio gateways. 3) Recode the HU to non-Logic 7, activating its analog outputs, repin the HU connector, and ta da. (Your graphic equalizer in the HU will disappear and be replaced by good old bass and treble controls). I'd like someone else to cover the M3 system, as I'm unfamiliar - and please supply suggestions for this, thanks.
	Appreciate 1 Reverend_Wrong16.50 Tweet Quote

02-17-2010, 11:53 AM	#2
Lee Rambler Captain 17 Rep 605 Posts Drives: 07 e92 335 6mt, 04 e53 x5 4.4 Join Date: Mar 2007 Location: PA iTrader: (0)	nice! needs stickied....
	Appreciate 0 Quote

02-17-2010, 12:08 PM	#3
wareagle900 Banned 30 Rep 413 Posts Drives: 2006 BMW 330i Join Date: Aug 2009 Location: South East Alabama iTrader: (0)	what are the rear effects speakers in the l7? are they the speakers in the rear deck? and are there component or coaxial speakers in the rear?
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02-17-2010, 12:30 PM	#4
Technic Lieutenant General 2281 Rep 12,997 Posts Drives: 2021 i3S, 2024 i4 M50 Join Date: Apr 2005 Location: Florida iTrader: (18)	Individual Audio/Enhanced Premium Audio System/SA 752 - same OEM speaker configuration as the Logic7 system, but with 16 speakers (14 in Convertible) instead of 13, by the use of coaxials in the center and rear panel 4" drivers. All speakers are upgraded with higher quality hexacones diaphragms and neo magnets; 4" drivers and coaxials are 4 ohms, tweeters are 7 ohms, woofers are 4 ohms. Front door components have a separate passive crossover network at each door. Other components have a capacitor inline. - same OEM amp configuration (MOST, 9-channel output) as Logic7 system but with 825W max power (vs 420W) and DIRAC Live processing (vs Harmon Kardon). Stereo and Surround modes, 7 band EQ features. Last edited by Technic; 03-27-2011 at 08:43 PM..
	Appreciate 0 Quote

02-18-2010, 06:08 AM	#6
wareagle900 Banned 30 Rep 413 Posts Drives: 2006 BMW 330i Join Date: Aug 2009 Location: South East Alabama iTrader: (0)	Heres a good article on what "parrallel", "series", etc wiring are. http://www.termpro.com/articles/spkrz.html
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02-18-2010, 03:49 PM	#7
fdriller9 Banned 252 Rep 7,089 Posts Drives: '06 AW 330xi Join Date: Mar 2009 Location: North Jersey/Philly/NYC iTrader: (4) Garage List 2006 330xi [6.44]	Nice Write up...we should get this, mine, and some other of the threads stickied...like the ultimate subwoofer guide.
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02-18-2010, 04:20 PM	#8
VP Electricity Brigadier General 289 Rep 3,201 Posts Drives: F34 xDrive Join Date: Jan 2008 Location: portland oregon iTrader: (3)	I strongly suspect others have covered this topic in the past. I'm not exactly clear what it takes to get something stickied on this forum section.
	Appreciate 0 Quote

02-18-2010, 05:08 PM	#9
Sirrus Private First Class 4 Rep 158 Posts Drives: 2013 335i M Sport Join Date: Dec 2009 Location: Orange County, CA iTrader: (0)	I'm guessing contact one of the forum moderators: shragon, stressdoc, KL2DC, Mr. 5, BoostedBMW, ybbiz34, Bimmer335i07, longtran, E92Fan, vivekk, BK Or an Administrator?
	Appreciate 0 Quote

01-10-2012, 02:58 PM	#10
hjvelez Enlisted Member 7 Rep 40 Posts Drives: 2012 E92 325i Join Date: Jan 2012 Location: Cartagena, Colombia iTrader: (0)	No answer on the mounting depth on the E92/93 doors? __________________ __________________________ 2012 325i Coupe Mineral White
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04-01-2016, 05:23 AM	#11
Herakles Captain 248 Rep 824 Posts Drives: United States Join Date: Jan 2015 Location: Pa iTrader: (0)	Would a bavsound upgrade for a 2011 335 sedan hifi be a marginal improvement ? I don't want to spend so much money on speakers if they are not much better ... I was thinking of starting with speakers first and see if im content before I go to amp and subs
	Appreciate 0 Quote

04-01-2016, 01:17 PM	#12
ctuna Lieutenant General 1911 Rep 13,102 Posts Drives: 325xi 06 wagon MT Join Date: Jan 2010 Location: Santa Cruz, Ca iTrader: (0)	Better to change the amplifier Better to change the amplifier In the case of the Hi Fi. Not many people in the US upgrade from L7 to Individual amp or that many in Europe either based on the posts here. Last edited by ctuna; 04-02-2016 at 01:23 AM..
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04-01-2016, 01:43 PM	#13
Ao1 Captain 123 Rep 604 Posts Drives: E92 M3 Join Date: Dec 2013 Location: England iTrader: (3)	Sorry to repost from another thread, but hopefully I will get a reply in this thread. Is the Individual amp a straight swap for the HK amp and would it OK to still use the HK speakers? if so would it provide a good sound upgrade? Thanks in advance.
	Appreciate 0 Quote

04-01-2016, 01:53 PM	#14
ptpending Colonel 456 Rep 2,747 Posts Drives: e91 Join Date: Dec 2013 Location: Poland iTrader: (1)	no, individual amplifier pump twice as much power as HK amp to the speakers __________________ E81 2007 130i 6cylinder Montego blue Retrofits: Harman Kardon, High-beam assistant, Removable tow hitch. Auto-dim folding exterior mirrors. Lumbar support. Perfomance Brakes.
	Appreciate 1 Quote

04-03-2016, 04:27 AM	#15
Ao1 Captain 123 Rep 604 Posts Drives: E92 M3 Join Date: Dec 2013 Location: England iTrader: (3)	I got a 2013 M3 in January with HK. The sound quality is just below par for my liking, mainly due to a lack of bass and general richness of sound. In my old car I was using Logic 7 subs, Individual speakers and the Bimmertech amp and I was really pleased with it, which leaves me with a dilemma. Upgrading to the Bimmertech amp is not an option. I would like to keep the car O&M as far as possible so upgrading to an Individual amp and speakers would be the best option in that regard, however the price second hand when they come up is way too expensive when you consider the cost of aftermarket options and the fact that they are typically 3 to 6 years old. My options are therefore: Upgrade door and subs with aftermarket and keep the Logic 7 amp. Focal 100 KRS/ Earthquake SWS - Around £450 Upgrade to Individual amp and Individual speakers (as far as I know a straightforward swap) Last for sale seen at £1,000, and 7 years old  Upgrade door and subs and amp with aftermarket amp Focal 100 KRS/ JL Audio XD500/3/ Earthquake SWS – Around £830. Upgrade speakers to JEHNERT FLAT-Line Woofer, High-End-midrange and Softdome-tweeter and keep the Logic 7 amp - around £420 The Individual amp and speakers would be my preferred choice in terms of keeping the car OEM, but I’m struggling to justify spending around £1,000 for a second hand system. JEHNERT seems a good option that would provide a good upgrade an minimal installation work. Last edited by Ao1; 04-07-2016 at 12:14 PM..
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06-22-2016, 09:17 AM	#16
invaz Registered 0 Rep 4 Posts Drives: 2008 e93 335i Join Date: Jun 2016 Location: Singapore iTrader: (0)	Thanks! Very informative!
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07-01-2016, 01:53 PM	#17
Ryanrs New Member 3 Rep 21 Posts Drives: 2011 E93 325d msport Join Date: Nov 2014 Location: kent iTrader: (0)	Hi I have a 2010 LCI e93 325d msport. I believe HIFI stereo on pro business idrive w/bluetooth streaming. It has a speaker in each door and L + R in the rear, no center or tweeter speakers. There is a sub under both front seats. I stripped the rear LH trim off from the boot (trunk) and there is No amplifier in there! on the rear RH there is the battery and removing the boot floor trim reveals a grey electronics box with what looks like can bus wiring, doesn't look audio related. Could anyone else give some clues as to where else the sub Amplifier may be? Many thanks Ryan
	Appreciate 0 Quote

07-01-2016, 11:24 PM	#18
ctuna Lieutenant General 1911 Rep 13,102 Posts Drives: 325xi 06 wagon MT Join Date: Jan 2010 Location: Santa Cruz, Ca iTrader: (0)	No tweeters = base system = no amp No tweeters = base system = no amp and also if you have a US 2010 you will have the base system or logic 7 . But logic 7 has tweeters and a amp. If you are in Europe any year can have the base system. Did you read the descriptions. Also your Vin should have the option number for Hi Fi or Top Hi FI if you have it. The head unit has nothing to do with the sound system. No matter which radio or idrive you have Well sorta but is does not mean you have an amp. 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...1&d=1209780605 http://www.e90post.com/forums/attach...1&d=1209780865 http://www.e90post.com/forums/showthread.php?t=641323 http://bmwcoders.com/forum/3-er-8/bm...1-e92-e93-291/ http://technicpnp.com/menuDiagrams/d...e90_92_93.html http://www.musicarnw.com/page-2/ http://www.e90post.com/forums/attach...4&d=1278871872 For help in the UK http://www.e90post.com/forums/showthread.php?t=704363 Last edited by ctuna; 07-01-2016 at 11:31 PM..
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07-12-2020, 09:06 AM	#20
Aj6543 Private First Class 30 Rep 143 Posts Drives: 2022 G26 Gran Coupe 430i Join Date: Apr 2015 Location: Washington, DC iTrader: (0)	Bump. Looking for the same answer. Also where can I buy the individual amp and speakers?
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07-14-2020, 03:54 PM	#22
erhanuzun28 Registered 0 Rep 3 Posts Drives: BMW 325d SE Saloon 2010 Join Date: Jul 2020 Location: Surrey, UK iTrader: (0)	CD cganger place is empty but fibre optic cable and poer/gorund cable Hi all, I have BMW 325D 2010 model e90 saloon with base sound system. No factory fitted amp/cd changer etc. I decided to upgrade the sound, bough AUDISON 8.9 BIT which has optical fibre sound input. I found fibre optical cables(2 pieces) come from BMW professional radio head unit. I bought and installed after Market Android iDrive, as instructed i moved fibre optic cables from head unit to iDrive. My question is can I use that fibre optic cables from car trunk to connect sound to AUDISON AP8.9 Could you please advice? thanks in advance
	Appreciate 0 Quote