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      05-18-2014, 12:26 PM   #1
BMWE934me
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L7 add an amp Technic harness upgrade to MS-8 to Speaker output/inputs

I have upgraded my L7 system using the great time and research saving Technic L7 add an amp harness. After adding an amp and trying several 8" mid-bass under seat speakers without much success, I have decided to expand my upgrade.

I want to replace my L7 for the JBL MS-8. I have chosen to do this by using a Mobridge DA2.

Since I already have a Technic harness, I would like to know if and how I can go about adapting my existing Technic harness to connect my speaker outputs to the OEM speaker harness.

Since I have an e93, I will only be using component speakers in the doors, the under seat woofers and possibly the front center and a ski-pass sub.
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      05-18-2014, 12:45 PM   #2
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This may help. You only use one end of the Technic harness connectors.
Attached Images
File Type: pdf MS-8 System Layout.pdf (279.1 KB, 23 views)
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      05-18-2014, 12:55 PM   #3
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Ignore the circled power and ground wires. This is half of the technic harness. The wires connect to the speaker outputs of your amps. The connector plugs into the OEM loom at the point where your current L7 amp is connected.

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      05-18-2014, 01:33 PM   #4
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Originally Posted by kaigoss69 View Post
This may help. You only use one end of the Technic harness connectors.
I had downloaded this wealth of knowledge drawing as I was reading through the hundreds of posts for the MS-8 upgrade. I see it will be very useful. Thank you

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Originally Posted by kaigoss69 View Post
Ignore the circled power and ground wires. This is half of the technic harness. The wires connect to the speaker outputs of your amps. The connector plugs into the OEM loom at the point where your current L7 amp is connected.

Is there a pin-out or color coded diagram for the speaker outputs to the Technic harness that is shown in the photo? I know there was a diagram that came with the Technic harness I received, but we had a community dumpster haul right after my install and boxes, warranty papers, receipts and other resource papers were thrown away with my wife's enthusiasm to get rid of my so called trash and junk. My wife and my garage are like oil and water
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      05-18-2014, 02:29 PM   #5
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I personally always used this wiring diagram. You will see these wires in the OEM loom that connects with the Technic harness. Just see which wire in the Technic harness connects with which OEM wire, and you'll be fine. The more recent Technic harnesses have the wires labeled, but the older ones don't.

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      05-18-2014, 02:41 PM   #6
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Quote:
Originally Posted by kaigoss69 View Post
I personally always used this wiring diagram. You will see these wires in the OEM loom that connects with the Technic harness. Just see which wire in the Technic harness connects with which OEM wire, and you'll be fine. The more recent Technic harnesses have the wires labeled, but the older ones don't.

I have that one too. Ahh! I just saw the light. I can use the color code from this diagram to pass the pin-outs from the speaker out connector side to the Technic side of the connection and label the Technic harness wires accordingly (LF-, LF+ ect...)
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      05-18-2014, 03:02 PM   #7
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If you're replacing your logic 7 amp with an ms8 (which I think is a bad idea) at least get an amp for the front speakers and underseats. The ms8 is extremely underpowered on its own. When I had my stock logic 7 speakers powered by the ms8 it actually sounded worse. Others have had better luck with it, but I thought it was too much of a hassle and my setup sounds cleaner without it.
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      05-18-2014, 03:15 PM   #8
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If you're replacing your logic 7 amp with an ms8 (which I think is a bad idea) at least get an amp for the front speakers and underseats. The ms8 is extremely underpowered on its own. When I had my stock logic 7 speakers powered by the ms8 it actually sounded worse. Others have had better luck with it, but I thought it was too much of a hassle and my setup sounds cleaner without it.
I do have a JL Audio 600/6 and 500/1 for this upgrade. I'm just getting my ducks in a row one step at a time. I'm sure the MS-8 would be better than the L7, but I know it would not power my speakers to their potential. I have no intention of using any of my L7 speakers either. I understand what you are saying about the set-up issues. If it gets out of control, I'll go in another direction.

How did you end up setting yours up w/o MS-8?
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      05-18-2014, 04:57 PM   #9
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I'm not sure where this diagrams origination came from, but I hope I'm not infringing on anyone's copyright. If so, I will remove it and redraw my own.

This is how I intend to put my system together.

Name:  Wiring Diagram-MS-8.jpg
Views: 81
Size:  145.9 KB

I may or may not run the sub-woofer part of this system. I will see how well the under seat woofers sound.

If I run a front center channel, it will only be if I decide to use my BSW stage 1 speakers. For an e93 it only consists of two door component speakers (4" mid and 1" tweeter) and one mid-range 4" front center speaker.

I also have a set of Focal 100A1 SG components. Two 4" mid-range, two 1" tweeters and two crossovers. I bought these for the rear side panels for fill, but decided to do the fronts alone.

And a set of Morel VIRTUS 402 components. Two 4" mid-range, two 1" tweeters and two crossovers.

For the underseat woofers, I have a set of Kicker SSMB-8's and a set of Phoenix Gold Platinum Elite mid-bass speakers.
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Last edited by BMWE934me; 05-19-2014 at 08:24 PM. Reason: Diagram edit
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      05-18-2014, 05:32 PM   #10
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Quote:
Originally Posted by BMWE934me View Post
I do have a JL Audio 600/6 and 500/1 for this upgrade. I'm just getting my ducks in a row one step at a time. I'm sure the MS-8 would be better than the L7, but I know it would not power my speakers to their potential. I have no intention of using any of my L7 speakers either. I understand what you are saying about the set-up issues. If it gets out of control, I'll go in another direction.

How did you end up setting yours up w/o MS-8?
I got a double din headunit so I have RCA outputs, I can also adjust time alignment and eq on it. I don't see a reason to use the ms8 if you have the 360.2. I believe the 360.2 can do time alignment and eq it just doesn't have autotune.
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      05-19-2014, 07:54 AM   #11
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That looks like a good plan. Keep in mind though, between the DA2 and the MS-8 you will only use DA-2 outputs #1 and #2. Like I suggested, try to hook-up only the front and sub first (no center, no rears) and see how you like it. MS-8 has a much easier time with a simple system like that and you will have to use no tricks or workarounds to make it sound excellent. The more channels you add, the more of an headache it can become!

In Logic 7, the function of the center is to create a good soundstage for every passenger in the car. If the goal is to make it sound as good as possible at any seat, then a "compromise" setting must be used (either "front or "all seats"). From my experience, the imaging of the "front" setting closely resembles that of the stock L7 system - the singer is near the left bottom corner of the windshield. I hate that, so I never use the front setting (and my wife doesn't know any better ).

With the "driver" setting everything is where it is supposed to be - the singer at the center of the hood and the stage stretching a little bit beyond the a-pillars on both sides. There is virtually no difference whether there is a center speaker present or not!
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      05-19-2014, 08:30 AM   #12
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Quote:
Originally Posted by kaigoss69 View Post
That looks like a good plan. Keep in mind though, between the DA2 and the MS-8 you will only use DA-2 outputs #1 and #2. Like I suggested, try to hook-up only the front and sub first (no center, no rears) and see how you like it. MS-8 has a much easier time with a simple system like that and you will have to use no tricks or workarounds to make it sound excellent. The more channels you add, the more of an headache it can become!

In Logic 7, the function of the center is to create a good soundstage for every passenger in the car. If the goal is to make it sound as good as possible at any seat, then a "compromise" setting must be used (either "front or "all seats"). From my experience, the imaging of the "front" setting closely resembles that of the stock L7 system - the singer is near the left bottom corner of the windshield. I hate that, so I never use the front setting (and my wife doesn't know any better ).

With the "driver" setting everything is where it is supposed to be - the singer at the center of the hood and the stage stretching a little bit beyond the a-pillars on both sides. There is virtually no difference whether there is a center speaker present or not!
That sounds more realistic to that of a live performance. Since I will be the only person in the car the majority of the time, the "Driver" setting sounds ideal.

I picked up a JL Audio HD600/4v4 last night. That should work perfect bridged (300w x2 @ 4ohms) to the Phoenix Gold Elite speakers under the seat and not use the Rockford Fosgate 300.2 instead of (150w x2 @ 2ohms).

I'm pretty pretty good with a simple install too. Thanks again!
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