[kaigoss69]

IB is more difficult with fold down seats, but definitely doable. I'm sure a shop can install it for about the cost of a custom enclosure. As far as SPL, IB is more efficient than a sealed enclosure, and sounds a heck of a lot better than using a standard fabricated box. Next best thing after IB is a corner loaded enclosure, but you're limited to a single 10 or 12" sub in a very small enclosure.

Many people like the Bavsound speakers running off the L7 amp. I'm sure that would be a big improvement. I would not replace the underseats, instead hook them up to a 2-channel amp with about 75W each, high-pass them at 55Hz, and you will be very happy.

Originally Posted by niko084

I've got a '06 330xi with the Logic 7 system... I'm fairly happy, I feel it needs a real subwoofer(s) and better tweeters (I think they are a bit harsh).

Here are the few questions if anyone can answer them...

I have at least 1 if not 2 rear speakers that are making not so great sounds occasionally, not sure if I have a bad midrange(s) or if it's resonance. It's fairly light and fairly rare, definitely frequency dependent.

Being I'm not totally pleased with the system-
Has anyone replaced the OEM Logic 7 midrange/tweeters with 4ohm components and run them off the OEM amp?
---I've done this on many Bose systems and been pretty happy.
If it's simply resonance, I may "roll the dice" and try replacing the tweeters along with adding one to the center and add some dampening.

As for the low end... I'm mixed between a sealed box using 2 10" or 12" drivers on around 600 watts (because I have a few amps laying around)

I want to consider an IB with 2 12" subs, however I've only done IB in homes. I'm a little concerned that might be a bit more work than I'm up to.
With IB I'll lose some SPL however I'm more concerned with sound quality, getting very low bass and not losing all my trunk space. (I'm looking at 1.75+cuft per sub for what I'd like)

Attachment 1349885
My IB ideal would be alike the picture, would this work with the back seat up? (I'm thinking not very well, but no experience in automotive IB)
I'd prefer this as I can put grills over the woofers to protect them, gain the SQ of an IB setup, and save trunk space.

[zoppp]

I've got an e60 with the hifi sound and my factory amp seems to cut out here and there when I have the music cranked (bass cuts out). I'm thinking of upgrading that factory amp but I'm not sure where to start. I believe the amp drives only the two underseat woofers in my car because when I unplugged the amp and played music, there was no bass. The amp i'm talking about is located on my left wheel well.

Would I just have to buy Technic's harness and a mono amp of some sort? Would appreciate some help.

[Josh_G]

this is an amazing thread! thank you for all the hard work on it. after securing my e92 355i yesterday this thread has given me everything i need to upgrade the sound system! now to get Technic to ship me a harness to the UK

[Pavlo]

Originally Posted by Josh_G

this is an amazing thread! thank you for all the hard work on it. after securing my e92 355i yesterday this thread has given me everything i need to upgrade the sound system! now to get Technic to ship me a harness to the UK

I'm in the UK and I'm selling technics harness but only as a complete system from my old installation which you can see on here, plus read technics comment.

http://www.e90post.com/forums/showthread.php?t=660927

If your interested PM me.

[taibanl]

Originally Posted by Josh_G

this is an amazing thread! thank you for all the hard work on it. after securing my e92 355i yesterday this thread has given me everything i need to upgrade the sound system! now to get Technic to ship me a harness to the UK

Youre welcome. Glad it helped

[JJaber]

Did things change in 2013 for the E92 coupe? I have 4 mids (2FR, 2RR), two tweeters in front, 2 under seat woofers, and an amp under the trunk tray. Also have navigation if that helps. Is this HiFi or base?

[taibanl]

Originally Posted by JJaber

Did things change in 2013 for the E92 coupe? I have 4 mids (2FR, 2RR), two tweeters in front, 2 under seat woofers, and an amp under the trunk tray. Also have navigation if that helps. Is this HiFi or base?

Hi-fi, the information you asked is in the first post

[Josh_G]

Originally Posted by Pavlo

I'm in the UK and I'm selling technics harness but only as a complete system from my old installation which you can see on here, plus read technics comment.

http://www.e90post.com/forums/showthread.php?t=660927

If your interested PM me.

Hi Pavlo,

Amazing install unfortunately its the wrong harness for me as i have the Hi-Fi system that is already amped in the boot. Also my install will be staged and not big bang like yours as i dont have the funds for that

I plan to replace the current OEM amp with a JL amp to power the current OEM system.

The next phase will involve upgrading the front components and under seat mid-ranges (haven't decided with what yet)

Then a matching set of components for the rear and a JL sub and mono amp in the boot.

Then if i can secure the funds, the CIC retrofit

[janispetke]

Does this same audio table apply to E60? I have a -08 E60 with the Hifi option (676), and it really needs an upgrade, but I couldn't any info about the amp and signal that is used in E60

[taibanl]

Not exactly. You might need a bit more specifc guidance. Contact bimmertech.

[skrelnik]

Originally Posted by janispetke

Does this same audio table apply to E60? I have a -08 E60 with the Hifi option (676), and it really needs an upgrade, but I couldn't any info about the amp and signal that is used in E60

I have an E60 and 6spdcoupe and mathematics helped me out with the install. Just reach out to them.

[Herakles]

Anyone have a reputable install shop in the tri state area or ne pa area ?

[taibanl]

Originally Posted by Herakles

Anyone have a reputable install shop in the tri state area or ne pa area ?

Contact Don Amann at unexpected creations in Edison New Jersey

[Zomorg3]

So besides Technic's Harness, there are no other harness like that in order to install aftermarket amps?

[taibanl]

Originally Posted by Zomorg3

So besides Technic's Harness, there are no other harness like that in order to install aftermarket amps?

There is the Metra pair of harnesses, which I believe work as one. However, I don't think they have a Remote lead or turn on

Connects2 which is A European company probably has harnesses most similar to those provided by technique

[hdmark]

Good evening all! read through alot of this am a little confused. The dealership listed my system as Hi-fi but i don't have tweeters so im 99% sure its just the base system and was listed incorrectly. But i got to wondering if maybe the system wasnt coded to hifi and thats why they listed it like that?
Is there a way to see which coding im running?

[ptpending]

Originally Posted by hdmark

Good evening all! read through alot of this am a little confused. The dealership listed my system as Hi-fi but i don't have tweeters so im 99% sure its just the base system and was listed incorrectly. But i got to wondering if maybe the system wasnt coded to hifi and thats why they listed it like that?
Is there a way to see which coding im running?

yes, you have to use your VIN number and get your factory options list via sites like BMWVIN.com etc

[ctuna]

If you look for the amp in the trunk it should be obvious
if its the base system because there won't be and amp.
Also if you are in the US the only year the base systems were
issued is 2010 through the first half ob 2011.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

[Zomorg3]

Originally Posted by taibanl

There is the Metra pair of harnesses, which I believe work as one. However, I don't think they have a Remote lead or turn on

Connects2 which is A European company probably has harnesses most similar to those provided by technique

The only Metra Harness I'm fimilar with is the one plugging under the dash. wasn't sure if there was another harness that will plug into the amp in the trunk ( I have HiFi as I have tweeters and mids/full range in door. I also have I drive as well) I have seen other members use T splices. Not sure how sound quality and and actual connection has faired. Would like it to be fully reversible and as clean as possible. Didn't know the other options.

Not too worried about the remote lead as I have an Audio Control Lc2i which will do signal sensing turn on.

Read through alot of the links not completely clear on install. Tried once already and it wasn't kicking on though I rammed the wires into the back of the connector for the BMW amp

[Pancakepuncher]

Just wondering if there is a thread on oem eq tuning for trunk subs tried to search but couldn't really find anything, trying to compliment my truck sub on the eq

[taibanl]

Originally Posted by Pancakepuncher

Just wondering if there is a thread on oem eq tuning for trunk subs tried to search but couldn't really find anything, trying to compliment my truck sub on the eq

Not that I know of, I don't think it would be useful because the sub is mostly below the OEM eq tuning range

[Pancakepuncher]

Originally Posted by taibanl

Not that I know of, I don't think it would be useful because the sub is mostly below the OEM eq tuning range

I'm just looking for the best way to increase the mids and mid bass since the sub will have ask the low