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7 Series - E65 / E66 (2002 - 2008)
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  #1  
Old 02-27-2006, 11:30 PM
rahrah215 rahrah215 is offline
2002 745i
Location: Richmond VA
 
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Aftermarket Stereo Components

I am thinking of adding a single sub-woofer to the trunk for a little added extra but need low end bass. Has anyone done this type of modification and what did they have to do to get it done?

Is there some type of interface that would output rca's to the amp?

Would this void my CPO Warranty?
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  #2  
Old 02-28-2006, 07:33 AM
black_ace black_ace is offline
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I doubt anyone is going to respond to this. I have asked this question at least four times. I need a little more bass as well. From what most of the people are telling me you have to remove the hatch where the rear arm rest is and port the sub through there. They say if you don't do it this way the bass will just drown out since the car is put together so well.....suposedly. Someone please let me know if you know other ways.....

Quote:
Originally Posted by rahrah215
I am thinking of adding a single sub-woofer to the trunk for a little added extra but need low end bass. Has anyone done this type of modification and what did they have to do to get it done?

Is there some type of interface that would output rca's to the amp?

Would this void my CPO Warranty?
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  #3  
Old 02-28-2006, 08:57 AM
jacksprat jacksprat is offline
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that is true, an opening should be cut out in where the rear center arm rest is for the sound to come thru. e65 has a steel enclosed trunk (same with many lexus, MB, and other luxury cars)...completely sealed off from the cabin. I had a 540i E39 I had to do the same thing I cut an opening then faced a 12" IDmax v.3 subwoofer straight thru the opening. Result was clean, deep, undistored, unmuffled bass. Facing the sub thru the opening so that it fires directly into the cabin also eliminates the dreaded ghetto trunk rattling problem, because all the sound and pressure created by the moving subwoofer goes into the cabin instead of bouncing around the confined space of the trunk. Another benefit is that you dont need that big of a sub or amp to get loud and deep bass, since you are not wasting any of the sound by trapping it in a trunk. When hooking up a subwoofer inside a steel enclosed trunk, if you dont create a port so the sound can travel into the cabin, the trunk basically acts as a secondary box (hence the rattling) and you can lose up to half of the dB level created by the sub.

Cutting an opening is not hard to do. Remove the rear seats, mark off how big you want the opening to be, then cut it out with a Sawzl or a jigsaw. The rear upper deck will need to be "dynamatted" since it vibrates rediclously even with the stock system.

The hard part is finding out how to interface with the factory sound system. Everyone on this board who has a sound system so far has reported that they paid a shop to do it so they have no idea how it was done. In my 540i I did a complete sound system overhaul so I didnt run into the problem of interfacing with the factory components.
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Last edited by jacksprat; 02-28-2006 at 09:29 AM.
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  #4  
Old 02-28-2006, 09:31 AM
rahrah215 rahrah215 is offline
2002 745i
Location: Richmond VA
 
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Mein Auto: BMW 745i
Quote:
Originally Posted by jacksprat
that is true, an opening should be cut out in where the rear center arm rest is for the sound to come thru. e65 has a steel enclosed trunk (same with many lexus, MB, and other luxury cars)...completely sealed off from the cabin. I had a 540i E39 I had to do the same thing I cut an opening then faced a 12" IDmax v.3 subwoofer straight thru the opening. Result was clean, deep, undistored, unmuffled bass. Facing the sub thru the opening so that it fires directly into the cabin also eliminates the dreaded ghetto trunk rattling problem, because all the sound and pressure created by the moving subwoofer goes into the cabin instead of bouncing around the confined space of the trunk. Another benefit is that you dont need that big of a sub or amp to get loud and deep bass, since you are not wasting any of the sound by trapping it in a trunk. When hooking up a subwoofer inside a steel enclosed trunk, the trunk basically acts as a secondary box (hence the rattling) and you can lose up to half of the dB level created by the sub.

Cutting an opening is not hard to do. Remove the rear seats, mark off how big you want the opening to be, then cut it out with a Sawzl or a jigsaw. The rear upper deck will need to be "dynamatted" since it vibrates rediclously even with the stock system.

The hard part is finding out how to interface with the factory sound system. Everyone on this board who has a sound system so far has reported that they paid a shop to do it so they have no idea how it was done. In my 540i I did a complete sound system overhaul so I didnt run into the problem of interfacing with the factory components.
I think i should be ok with not having to actually cut a whole due to the fact my car has the cold weather package. If I remove the ski bag due to the fact I will never use it that should work ok, right?

My real question is how do you tap into the audio source for RCA outputs. I seen a website for Basslink II by Infinity specially made for BMW's but failed to mention 7. I hate to email manufacturers about installs because they always give such basic generic information and not a real answer to my questions.

Thanks in advance to everyone else who may respond.
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  #5  
Old 02-28-2006, 09:31 AM
rahrah215 rahrah215 is offline
2002 745i
Location: Richmond VA
 
Join Date: Feb 2006
Posts: 38
Mein Auto: BMW 745i
Quote:
Originally Posted by jacksprat
that is true, an opening should be cut out in where the rear center arm rest is for the sound to come thru. e65 has a steel enclosed trunk (same with many lexus, MB, and other luxury cars)...completely sealed off from the cabin. I had a 540i E39 I had to do the same thing I cut an opening then faced a 12" IDmax v.3 subwoofer straight thru the opening. Result was clean, deep, undistored, unmuffled bass. Facing the sub thru the opening so that it fires directly into the cabin also eliminates the dreaded ghetto trunk rattling problem, because all the sound and pressure created by the moving subwoofer goes into the cabin instead of bouncing around the confined space of the trunk. Another benefit is that you dont need that big of a sub or amp to get loud and deep bass, since you are not wasting any of the sound by trapping it in a trunk. When hooking up a subwoofer inside a steel enclosed trunk, the trunk basically acts as a secondary box (hence the rattling) and you can lose up to half of the dB level created by the sub.

Cutting an opening is not hard to do. Remove the rear seats, mark off how big you want the opening to be, then cut it out with a Sawzl or a jigsaw. The rear upper deck will need to be "dynamatted" since it vibrates rediclously even with the stock system.

The hard part is finding out how to interface with the factory sound system. Everyone on this board who has a sound system so far has reported that they paid a shop to do it so they have no idea how it was done. In my 540i I did a complete sound system overhaul so I didnt run into the problem of interfacing with the factory components.
I think i should be ok with not having to actually cut a whole due to the fact my car has the cold weather package. If I remove the ski bag due to the fact I will never use it that should work ok, right?

My real question is how do you tap into the audio source for RCA outputs. I seen a website for Basslink II by Infinity specially made for BMW's but failed to mention 7. I hate to email manufacturers about installs because they always give such basic generic information and not a real answer to my questions.

Thanks in advance to everyone else who may respond.
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  #6  
Old 02-28-2006, 03:23 PM
nyrican nyrican is offline
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Location: springfield ma
 
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The basics of installing adding an aftermarket amp and sub to a factory system are VERY easy, you need to run power to the amp, a ground from the amp to the car, and an 12v ignition based source to use as a signal to turn the amp on. Then you need a source to run an input signal signal to the amp for it to amplify. All you need is a line level converter for that, it basically taps into any of your factory speakers and converts the regular speaker wire into an RCA jack so you then easily plug into the amplifier. Then obviously choose your amp , sub and box of choice. The rest is really up to how nice looking you want to make. It sounds alot more complicated than it really is, but if you are reading this and you are already lost, then just take it somewhere and pay for it to get done or you will end up with a large repair bill and possibly a voided warranty.
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  #7  
Old 02-28-2006, 04:33 PM
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kato23 kato23 is offline
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yeah this is my setup ..i honestly dont know how they did it because i just told them to add and amp and sub...but it was probably just like nyrican said...i probably wont keep this because i dont like it...i think im going to have something fabricated for a more custom look
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Last edited by kato23; 03-01-2006 at 11:45 AM.
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  #8  
Old 02-28-2006, 04:54 PM
nyrican nyrican is offline
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Location: springfield ma
 
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Kato I don't mean to offend you in any way at all but....DO NOT GO BACK THERE!!!
I plan on opening a full customization/ tuning shop when I retire from the Army in about 7 years, and let me tell you if a guy with a car anything like yours I would do a whole lot better than that. That is horrible, unless you were really trying to go cheap on the install price. That might be fine for a Honda Civic but thats downright disrespectful to a 7 series.
When you are ready to upgrade make sure you get something more customized that will at least blend with your interior. I''m not talking about the quality of you parts just the lack of any kind of customization with the install.
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  #9  
Old 02-28-2006, 05:17 PM
jacksprat jacksprat is offline
what?
Location: seattle
 
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I dont mean to offend you either man, you know I got your back against the "non-modders" in this forum, but I agree with nyrican.

Im just a "do-it-yourselfer" and with simple garage tools and materials bought at HomeDepot/Lowe's I was able to something much more clean and becoming of a high end BMW than what you have pictured there. Im surprised the shop you went to didnt try to talk you into at least having them make a facade to conceal the box and only reaveal the sub.

Again, your choice of components is good, but the install is disgraceful to have in BMW's flagship vehicle. I know you have the money, so go back to that shop or go to a better shop and have them do it up right.
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  #10  
Old 02-28-2006, 06:30 PM
nyrican nyrican is offline
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Location: springfield ma
 
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Quote:
Originally Posted by jacksprat
I dont mean to offend you either man, you know I got your back against the "non-modders" in this forum, but I agree with nyrican.

Im just a "do-it-yourselfer" and with simple garage tools and materials bought at HomeDepot/Lowe's I was able to something much more clean and becoming of a high end BMW than what you have pictured there. Im surprised the shop you went to didnt try to talk you into at least having them make a facade to conceal the box and only reaveal the sub.

Again, your choice of components is good, but the install is disgraceful to have in BMW's flagship vehicle. I know you have the money, so go back to that shop or go to a better shop and have them do it up right.
I almost agree with your opinion 100%, except for the go back to that shop again...DO NOT GO BACK. If they did not have the professional pride to lead you in the right direction then don't mess with them.
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  #11  
Old 02-28-2006, 06:56 PM
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kato23 kato23 is offline
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Quote:
Originally Posted by nyrican
Kato I don't mean to offend you in any way at all but....DO NOT GO BACK THERE!!!
I plan on opening a full customization/ tuning shop when I retire from the Army in about 7 years, and let me tell you if a guy with a car anything like yours I would do a whole lot better than that. That is horrible, unless you were really trying to go cheap on the install price. That might be fine for a Honda Civic but thats downright disrespectful to a 7 series.
When you are ready to upgrade make sure you get something more customized that will at least blend with your interior. I''m not talking about the quality of you parts just the lack of any kind of customization with the install.
why would they give me customization if i didnt ask for it...i got what i paid for...furthermore i wanted someting right now..i wasnt about to wait while they fabricated something..i said i was going to do it over when i was ready to spend that amount of time...
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2007 Chevy Tahoe
2008 CL63 AMG (my fav)
2007 Suzuki GSXR 1000
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Last edited by kato23; 02-28-2006 at 06:58 PM.
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  #12  
Old 02-28-2006, 07:00 PM
jacksprat jacksprat is offline
what?
Location: seattle
 
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it's called pride in what you do man. I know many installers in my area who would refuse to touch a high end car like a 745 and have their names associated with a poor install. Granted you asked for a basic install on a subwoofer but I would have to say that any shop/installer with true passion would've steered you away from doing what is posted in that pic.
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  #13  
Old 02-28-2006, 07:11 PM
nyrican nyrican is offline
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It would have taken maybe a couple of hours more of work to make it right, thats all. Like I said earlier I am not clowning or anything like that. You have got to admit that it looks out of place.
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  #14  
Old 02-28-2006, 07:21 PM
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kato23 kato23 is offline
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Quote:
Originally Posted by nyrican
It would have taken maybe a couple of hours more of work to make it right, thats all. Like I said earlier I am not clowning or anything like that. You have got to admit that it looks out of place.
i know that..i said i will redo it later..i was already there 4 hours...i dont even know how long it wouldve taken for fabrication..ill do it later on im not in a big hurry i just got the car like a week and a half ago...and spent about 800 bucks for the stuff in the trunk and $6000 on the rims...not to mention the 30 grand i put down for them to approve me for an expensive car like this...i mean its not like i have alot of credit...but custom will come..its just temporary
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  #15  
Old 02-28-2006, 07:25 PM
nyrican nyrican is offline
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I'm sure it will man. Keep bangin man, you doin it big homie. I hope I can come across a good deal on some rims soon.
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  #16  
Old 02-28-2006, 07:25 PM
nyrican nyrican is offline
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I'm sure it will man. Keep bangin man, you doin it big homie. I hope I can come across a good deal on some rims soon.
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  #17  
Old 02-28-2006, 07:28 PM
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Quote:
Originally Posted by nyrican
I'm sure it will man. Keep bangin man, you doin it big homie. I hope I can come across a good deal on some rims soon.
yeah just give me a month or so..and ill have a fully custom install..but for right now the box stays...
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  #18  
Old 02-28-2006, 09:33 PM
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  #19  
Old 03-01-2006, 07:41 AM
black_ace black_ace is offline
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The bigger question is how does it sound. I feel you on the not wanting to wait. Hell the shop told me they would have my car the whole day. I'm with the rest of them though. I can't really say I like the look, but I don't have to it's your car. Let me know what it sounds like. I don't want any trunk rattle or anything like that. I'm cool with them fabricating mine, I just don't want them to screw up anything with I drive. Will this void the warranty at all, does anyone know? The first thing BMW will say when something goes wrong is.......Well you installed this subwoofer, that is the problem.



Quote:
Originally Posted by kato23
yeah just give me a month or so..and ill have a fully custom install..but for right now the box stays...

Last edited by black_ace; 03-01-2006 at 07:45 AM.
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  #20  
Old 03-01-2006, 08:35 AM
jacksprat jacksprat is offline
what?
Location: seattle
 
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BlackAce: If you install a sound system and say, your cd player stops working, then BMW will not cvoer it in warranty. However if say, your suspension fails, and all you did was install a sound system, then they WILL cover the suspension. I have rims and car is lowered, that means my entire suspension warranty is void. However if the engine or electricals crap out then its still under warranty.

If you dont want your trunk to rattle then cutting an opening behind the rear armrest to allow sound into the cabin is a must. The subwoofer should also face the cabin thru the created opening. Sealing a subwoofer in a steel enclosed trunk is a concotion for nasty, Buick Regal from the ghetto sounding rattles.

I can post pics of the install I did myself in my 540i if you guys are interested.
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  #21  
Old 03-01-2006, 11:45 AM
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geez its just a box for right now.. you guys are overreacting im not making a show car....ill do custom later on
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2007 Chevy Tahoe
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  #22  
Old 03-01-2006, 12:27 PM
black_ace black_ace is offline
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I understand, but how does it sound? Do you have any rattle. I will not be the guy with a 70k car that rattles. I've been wanting to do something for quite some time. I'm ready to do something now, just don't want to waste a lot of money on something I'm going to end up taking out of the car.


Quote:
Originally Posted by kato23
geez its just a box for right now.. you guys are overreacting im not making a show car....ill do custom later on
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  #23  
Old 03-01-2006, 12:31 PM
jacksprat jacksprat is offline
what?
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does anyone in here read? IT WILL RATTLE LIKE A MUTHAFUKA
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  #24  
Old 03-01-2006, 03:31 PM
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kato23 kato23 is offline
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Quote:
Originally Posted by black_ace
I understand, but how does it sound? Do you have any rattle. I will not be the guy with a 70k car that rattles. I've been wanting to do something for quite some time. I'm ready to do something now, just don't want to waste a lot of money on something I'm going to end up taking out of the car.
yeah the license plate rattled a lil i put 2 screws at the bottom because i didnt have them in and i turned the bass down some..but overall it sounds good...but you will need to do stuff to control the rattle
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My Garage
2004 BMW 645ci convertible
2007 s550 Mercedes Benz
2007 Chevy Tahoe
2008 CL63 AMG (my fav)
2007 Suzuki GSXR 1000
2000 Hayabusa (painted chromed stretched)
www.freeweblayouts.net
www.myspace.com/kato3000
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  #25  
Old 03-01-2006, 04:36 PM
rahrah215 rahrah215 is offline
2002 745i
Location: Richmond VA
 
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Quote:
Originally Posted by kato23
yeah the license plate rattled a lil i put 2 screws at the bottom because i didnt have them in and i turned the bass down some..but overall it sounds good...but you will need to do stuff to control the rattle
whats up man, can you tell me the shop that did your work in the trunk. i am just looking for something quick like you. I really dont care about custom work. As long as it sounds good thats all i care about. I dont really trust anyone around here in richmond (Audio one or Audio Express) So if you could please give me the contact information for the shop that did your work. Thanks in advance.
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