e90 Rear Door Speakers

pelon222 · 10-12-2018, 03:00 PM

Hi all, my car came with hifi system, no speakers on the rear doors, what would be the best way to wire up speakers mounted on the rear doors? is it possible keeping the same amp?

thanks in advanced

ctuna · 10-12-2018, 04:02 PM

pelon222 · 10-12-2018, 04:27 PM

No my car came with speakers on the front doors and the rear deck (HIFI system), nothing on the rear doors, I want to add speakers on the rear door panels, but there is no wiring for it as far as I know. I want to know if I can just tap into the rear deck speakers to run wires to the rear doors

ctuna · 10-12-2018, 04:34 PM

If you have a hi fi system you already have a weak under powered amp.

It's the worst part of the Hi Fi system but the speakers aren't to good either.

Rear speakers in general do not contribute much if anything to the over all sound. You would be better off to get aftermarket speakers for the fronts
(doors and floors ) along with and amp upgrade.
If the choice was amp or speakers the amp is the weakest link.

I think you should go over the links.

Also the stock speakers are already 2 ohm so if you put more speakers in
parallel not only will it not sound good but you will blow the amp.

Ali-E90 · 10-13-2018, 08:30 AM

Ctuna is a super helpful resource here, take a look at what he posted. Always so helpful.

I agree, if you're adding additional speakers in new locations, you will need to upgrade your amp (but you may want to do that anyway since it is the weakest link in the system you have)

That being said, my guess is you want rear door speakers for the benefit of backseat passengers, in which case the suggestion to only upgrade front stage and ignore or disconnect rear speakers may not be ideal (but it is often proposed).

Just keep in mind that since the doors don't have speakers now, you'll obviously have the flexibility to make holes to fit almost any size diameter speaker you want. But be mindful of speaker depth, I don't think there's room for most speakers unless designed as slim etc.

ctuna · 10-13-2018, 12:50 PM

If you committed to to this you might want to find door
panels that have the holes in them already. The Logic 7
cars have speakers in the rear doors. But this is not the path to
better sound just more speakers.
And as was mentioned the clearance is really shallow . See
the speaker list in the audio build thread for speakers that will
fit.

pelon222 · 10-28-2018, 12:40 PM

Quote:

Originally Posted by ctuna

If you committed to to this you might want to find door
panels that have the holes in them already. The Logic 7
cars have speakers in the rear doors. But this is not the path to
better sound just more speakers.
And as was mentioned the clearance is really shallow . See
the speaker list in the audio build thread for speakers that will
fit.

I got a good deal on rear door panels from a logic 7 car, including all speakers. That's why I was wondering about the wiring for the rear door speakers, I am also going with a new 6ch amp, not sure on which one yet.

thanks for the help

ctuna · 10-28-2018, 04:33 PM

You are going to have to run wires there I think.

Now that you have 8 speaker locations you will need and 8
channel amp.

If you are not going to buy more speakers I would use the L7's
in front.(since there suppose to be higher quality and take more power. )

10-12-2018, 03:00 PM	#1
pelon222 Private 13 Rep 78 Posts Drives: E90 328i Join Date: Jun 2018 Location: Tucson iTrader: (0)	e90 Rear Door Speakers Hi all, my car came with hifi system, no speakers on the rear doors, what would be the best way to wire up speakers mounted on the rear doors? is it possible keeping the same amp? thanks in advanced
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10-12-2018, 04:02 PM	#2
ctuna Lieutenant General 1911 Rep 13,101 Posts Drives: 325xi 06 wagon MT Join Date: Jan 2010 Location: Santa Cruz, Ca iTrader: (0)	You mean somebody removed them? You need to identify your amp sound system and head unit. 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...3&d=1169133185 http://www.e90post.com/forums/attach...4&d=1278871872
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10-12-2018, 04:27 PM	#3
pelon222 Private 13 Rep 78 Posts Drives: E90 328i Join Date: Jun 2018 Location: Tucson iTrader: (0)	No my car came with speakers on the front doors and the rear deck (HIFI system), nothing on the rear doors, I want to add speakers on the rear door panels, but there is no wiring for it as far as I know. I want to know if I can just tap into the rear deck speakers to run wires to the rear doors
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10-12-2018, 04:34 PM	#4
ctuna Lieutenant General 1911 Rep 13,101 Posts Drives: 325xi 06 wagon MT Join Date: Jan 2010 Location: Santa Cruz, Ca iTrader: (0)	If you have a hi fi system you already have a weak under powered amp. It's the worst part of the Hi Fi system but the speakers aren't to good either. Rear speakers in general do not contribute much if anything to the over all sound. You would be better off to get aftermarket speakers for the fronts (doors and floors ) along with and amp upgrade. If the choice was amp or speakers the amp is the weakest link. I think you should go over the links. Also the stock speakers are already 2 ohm so if you put more speakers in parallel not only will it not sound good but you will blow the amp.
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10-13-2018, 08:30 AM	#5
Ali-E90 Colonel 379 Rep 2,365 Posts Drives: 2007 E90 323i (Cdn) Join Date: May 2013 Location: Toronto, Canada iTrader: (3) Garage List 2008 BMW M3 [8.00] 2007 BMW 323i [8.50]	Ctuna is a super helpful resource here, take a look at what he posted. Always so helpful. I agree, if you're adding additional speakers in new locations, you will need to upgrade your amp (but you may want to do that anyway since it is the weakest link in the system you have) That being said, my guess is you want rear door speakers for the benefit of backseat passengers, in which case the suggestion to only upgrade front stage and ignore or disconnect rear speakers may not be ideal (but it is often proposed). Just keep in mind that since the doors don't have speakers now, you'll obviously have the flexibility to make holes to fit almost any size diameter speaker you want. But be mindful of speaker depth, I don't think there's room for most speakers unless designed as slim etc. __________________ Check out my Mod Thread Here
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10-13-2018, 12:50 PM	#6
ctuna Lieutenant General 1911 Rep 13,101 Posts Drives: 325xi 06 wagon MT Join Date: Jan 2010 Location: Santa Cruz, Ca iTrader: (0)	If you committed to to this you might want to find door panels that have the holes in them already. The Logic 7 cars have speakers in the rear doors. But this is not the path to better sound just more speakers. And as was mentioned the clearance is really shallow . See the speaker list in the audio build thread for speakers that will fit.
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10-28-2018, 04:33 PM	#8
ctuna Lieutenant General 1911 Rep 13,101 Posts Drives: 325xi 06 wagon MT Join Date: Jan 2010 Location: Santa Cruz, Ca iTrader: (0)	You are going to have to run wires there I think. Now that you have 8 speaker locations you will need and 8 channel amp. If you are not going to buy more speakers I would use the L7's in front.(since there suppose to be higher quality and take more power. )
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