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      01-10-2011, 01:23 PM   #1
mark3ys
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LOC install for HiFi system

Hey everyone.

I'm new to this forum and I just picked up a 2006 325xi with the HiFi system (I believe). I have tweeters in my front doors and I have a silver amp in the rear driver side of my trunk. I recently purchased a PAC SOEM-T. I am looking to install an aftermarket amp to power a single 12" sub. I know there have been many posts regarding DIY on how to install these things. I am just looking for clarification on everything that I have read.

Best wires to tap into for the SOEM-T LOC
1. Left and Right under seat woofers for signal for the LOC

SUB LEFT
Red/White +
Brown/Yellow -
SUB RIGHT
Red/Blue +
Brown/White -

Are these the best wires to tap into for the sound signal for the LOC?

2. Unsure which is best for the RTO

PIN 10 - thin black wire from OEM amp harness?



Any help would be greatly appreciated.
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      01-10-2011, 01:50 PM   #2
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There is a hifi wiring diagram on this forum. Better yet though, I would get Technic's harness which will not do any harm to the existing wiring and will make your install as easy as pie.
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      01-10-2011, 02:16 PM   #3
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That's Logic7; the HiFi amp color is black.

Quote:
Originally Posted by mark3ys View Post
Hey everyone.

I'm new to this forum and I just picked up a 2006 325xi with the HiFi system (I believe). I have tweeters in my front doors and I have a silver amp in the rear driver side of my trunk. I recently purchased a PAC SOEM-T. I am looking to install an aftermarket amp to power a single 12" sub. I know there have been many posts regarding DIY on how to install these things. I am just looking for clarification on everything that I have read.

Best wires to tap into for the SOEM-T LOC
1. Left and Right under seat woofers for signal for the LOC

SUB LEFT
Red/White +
Brown/Yellow -
SUB RIGHT
Red/Blue +
Brown/White -

Are these the best wires to tap into for the sound signal for the LOC?

2. Unsure which is best for the RTO

PIN 10 - thin black wire from OEM amp harness?



Any help would be greatly appreciated.
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      01-10-2011, 02:22 PM   #4
mark3ys
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I just read that Technic. very interesting.
Now i have no idea what my best option is.
I have the SOEM-T, is that suitable? and which wires would be the best to tap into? (the ones i mentioned before?)

SUB LEFT
Red/White +
Brown/Yellow -

SUB RIGHT
Red/Blue +
Brown/White -

PIN 13 (due to Logic7 not HiFi) for RTO



sorry for my retardation!

Last edited by mark3ys; 01-10-2011 at 02:31 PM. Reason: clarification
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      01-10-2011, 02:44 PM   #5
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Crap happens and then you die, no problem...

The SOEM-T should work with the Logic7 70W max woofer outputs. The wires to tap are pin 8/18 and 6/16 in the OEM amp. There is a diagram somewhere here with the schematics and pin assignements.

Quote:
Originally Posted by mark3ys View Post
I just read that Technic. very interesting.
Now i have no idea what my best option is.
I have the SOEM-T, is that suitable? and which wires would be the best to tap into? (the ones i mentioned before?)

SUB LEFT
Red/White +
Brown/Yellow -

SUB RIGHT
Red/Blue +
Brown/White -

PIN 13 (due to Logic7 not HiFi) for RTO



sorry for my retardation!
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      01-10-2011, 02:51 PM   #6
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Quote:
Originally Posted by Technic View Post
Crap happens and then you die, no problem...

The SOEM-T should work with the Logic7 70W max woofer outputs. The wires to tap are pin 8/18 and 6/16 in the OEM amp. There is a diagram somewhere here with the schematics and pin assignements.
thank you very much.
is the best remote wire tap on pin 13?
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      01-10-2011, 02:53 PM   #7
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Quote:
Originally Posted by mark3ys View Post
thank you very much.
is the best remote wire tap on pin 13?
Yes, back of the OEM HU/iDrive. My suggestion is to use relay and 1A fuse for protection. If that line gets damaged your OEM HU gets damaged.
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      01-10-2011, 04:03 PM   #8
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Quote:
Originally Posted by Technic View Post
Yes, back of the OEM HU/iDrive. My suggestion is to use relay and 1A fuse for protection. If that line gets damaged your OEM HU gets damaged.
is there a particular one you recommend to use?

thanks for all your help
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      01-10-2011, 04:11 PM   #9
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Quote:
Originally Posted by mark3ys View Post
is there a particular one you recommend to use?

thanks for all your help
Any automotive relay should work.
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      01-10-2011, 04:56 PM   #10
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The SOEM-T is rated to 55W IIRC.
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      01-10-2011, 05:27 PM   #11
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Quote:
Originally Posted by VP Electricity View Post
The SOEM-T is rated to 55W IIRC.
PAC rated it at 60W max; it should be just enough for the Logic7 amp unless the OEM volume and all the bass adjustments are maxed out.

http://www.pac-audio.com/productDeta...&CategoryID=28
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      01-11-2011, 09:44 PM   #12
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Thanks for all your help Technic!
Got it installed today. Sounds good.
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      01-12-2011, 03:43 AM   #13
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To technics

I have a question, what if you don't use a relay but the one you use for line out converter has a feature that automatically turn off/on your aftermarket amp.. Is this advisable?
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      01-12-2011, 03:55 AM   #14
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http://www.sonicelectronix.com/item_18560_Hifonics-Maxxsonics-MX-1.html


Here's the product I'm talking about. It has the feature act like a remote wire
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      01-12-2011, 11:44 PM   #15
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one thing i notice is that the bass signal is a bit to high frequency for proper deep bass. what can i do about that? is that just my amp settings and/or car eq settings? or do i need to get something that makes the signal im tapping a lower frequency?
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      01-13-2011, 01:18 AM   #16
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Well the signal is not highpassed so it will play all low frequencies you would need to lowpass it if your using the signal for a subwoofer in the trunk as midbass is directional. Your amp should have a setting for this.
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      01-13-2011, 03:56 PM   #17
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Quote:
Originally Posted by bmw325i View Post
Well the signal is not highpassed so it will play all low frequencies you would need to lowpass it if your using the signal for a subwoofer in the trunk as midbass is directional. Your amp should have a setting for this.
my amp is pretty old (like 6-8 years or so)
i just seem to get a bit more then only low frequency bass
i understand it is a midbass signal
im just wondering what i can do to lower the frequency
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      01-21-2011, 11:30 PM   #18
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i was just wondering what the optimal settings are for the loc in terms of gain?
is the way it comes out of the packaging ok or should it be optimized?
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