Technic Harness (w/ relay) & MS-8

taibanl · 09-28-2012, 11:36 AM

Technic and MS-8ers:

I have some issues with my current install that may be simply be the result of adding more power and thus making previously existing issues more apparent.

I am wondering if the relay as part of the MS-8 may be causal or contributing to the problems...I am thinking it may have to do with some portion of the following issues:

Power on Pops
Audible (analog) noise floor
Clicking sound from behind OEM HU (new problem)
sporadic issues triggering various OBC errors (seems to correlate with the item immediately above).
MS-8 rebooting in conjunction with item 3 and 4 above

I am considering removing the relay from the MS-8 remote wire (and running OEM remote signal directly to MS-8 input). I would like recommendations on whether or not this is advisable as well as potential effects.

If there is no issue (from previous comments by VP-Electricity) the relay may be redundant in an MS-8 system...

Technic...can you advise me as to the wiring before and after?

Thank you.

taibanl · 09-28-2012, 11:57 AM

Edit: Also referring this to Andy W on DIYMA:

http://www.diymobileaudio.com/forum/...-post8538.html

Technic · 09-28-2012, 11:58 AM

Remove relay and place a 1A fuse on OEM remote out signal. Report back...

makkan00 · 09-28-2012, 12:34 PM

Taibnal,
I have made a harness which is without relay and used it with ms-8.
I have an issue of audible popping sound when HU / car is turned on.
I was praising Technic's harness on other thread as I thought it would also help to avoid popping sound.
Waiting to see results of your experiment.

mob17 · 09-28-2012, 12:43 PM

Im also going to add more power in the future. Hope you sort this out.

taibanl · 09-28-2012, 01:11 PM

Quote:

Originally Posted by makkan00

Taibnal,
I have made a harness which is without relay and used it with ms-8.
I have an issue of audible popping sound when HU / car is turned on.
I was praising Technic's harness on other thread as I thought it would also help to avoid popping sound.
Waiting to see results of your experiment.

What configuration are you in? Stereo or HiFi?

kaigoss69 · 09-28-2012, 01:20 PM

The popping, as far as I can tell, is definitely not related to the harness, and probably not the relay either. And yes, the pin 13 signal from the back of the HU has more than enough juice to turn on the ms-8.

Andy W. already explained the reason for the popping over at DIYMA, although it may have been in connection with high-level amp outputs, not sure. It had to do with a voltage differential between the speaker-level outputs, and the ground, IIRC, but I'm no genius when it comes to electrical things...

kaigoss69 · 09-28-2012, 01:23 PM

You can eliminate the turn-on signal as the source for the popping by bridging between the terminals between the 12V+ and remote. If you do that, it will still pop. I tried it already.

taibanl · 09-28-2012, 01:24 PM

Quote:

Originally Posted by kaigoss69

The popping, as far as I can tell, is definitely not related to the harness, and probably not the relay either. And yes, the pin 13 signal from the back of the HU has more than enough juice to turn on the ms-8.

Andy W. already explained the reason for the popping over at DIYMA, although it may have been in connection with high-level amp outputs, not sure. It had to do with a voltage differential between the speaker-level outputs, and the ground, IIRC, but I'm no genius when it comes to electrical things...

Yes, Andy's explanation related to the voltage transients specifically when using speaker level from the HU....it could also be the case that we are somewhere in between as the HU is capable of 5v AC-RMS while ms-8 accepts 2.8

I any case I do think my relay is on the fritz

kaigoss69 · 09-28-2012, 01:25 PM

Only way to get rid of it is to get a DA2, or get rid of the ms-8.

Technic · 09-28-2012, 01:27 PM

In my experience with 15+ MS-8 installs, any pop issue is at turn off and not at turn on. That is regardless of high or low inputs to the MS-8.

makkan00 · 09-28-2012, 01:28 PM

Quote:

Originally Posted by taibanl

What configuration are you in? Stereo or HiFi?

It is Hi-fi coded HU ---> MS-8 ---> Amp.
Here is the detail of the system.

mob17 · 09-28-2012, 02:35 PM

FWIW i only have turn on pop. Nothing at turn off. The pop reduces significantly if i reduce the OEM base level on iDrive before starting the engine. There is also zero turn on pop when i start the car quick enough, i.e just before the ms-8 starts up.

makkan00 · 10-02-2012, 01:06 AM

Taibanl,
Any update on this?

taibanl · 10-02-2012, 05:10 AM

Sorry no current eta as to when I can do some wiring.

09-28-2012, 11:36 AM	#1
taibanl Brigadier General 281 Rep 4,121 Posts Drives: BMW Join Date: Sep 2010 Location: NA iTrader: (4)	Technic and MS-8ers: I have some issues with my current install that may be simply be the result of adding more power and thus making previously existing issues more apparent. I am wondering if the relay as part of the MS-8 may be causal or contributing to the problems...I am thinking it may have to do with some portion of the following issues: Power on Pops Audible (analog) noise floor Clicking sound from behind OEM HU (new problem) sporadic issues triggering various OBC errors (seems to correlate with the item immediately above). MS-8 rebooting in conjunction with item 3 and 4 above I am considering removing the relay from the MS-8 remote wire (and running OEM remote signal directly to MS-8 input). I would like recommendations on whether or not this is advisable as well as potential effects. If there is no issue (from previous comments by VP-Electricity) the relay may be redundant in an MS-8 system... Technic...can you advise me as to the wiring before and after? Thank you. Last edited by taibanl; 09-28-2012 at 11:46 AM..
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09-28-2012, 11:57 AM	#2
taibanl Brigadier General 281 Rep 4,121 Posts Drives: BMW Join Date: Sep 2010 Location: NA iTrader: (4)	Edit: Also referring this to Andy W on DIYMA: http://www.diymobileaudio.com/forum/...-post8538.html
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09-28-2012, 11:58 AM	#3
Technic Lieutenant General 2277 Rep 12,996 Posts Drives: 2021 i3S, 2024 i4 M50 Join Date: Apr 2005 Location: Florida iTrader: (18)	Remove relay and place a 1A fuse on OEM remote out signal. Report back...
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09-28-2012, 12:34 PM	#4
makkan00 Major General 886 Rep 9,097 Posts Drives: F83 and F36 Join Date: Dec 2011 Location: Essex iTrader: (56)	Taibnal, I have made a harness which is without relay and used it with ms-8. I have an issue of audible popping sound when HU / car is turned on. I was praising Technic's harness on other thread as I thought it would also help to avoid popping sound. Waiting to see results of your experiment. __________________ F36 Xdrive for her - HUD, park assist, heated steering wheel, rear camera, Apple car play F36 RWD for him - HK, M sports pack, GTS tail light, Apple car play
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09-28-2012, 12:43 PM	#5
mob17 Major General 400 Rep 5,623 Posts Drives: E92 335D Join Date: Mar 2012 Location: East Midlands, UK iTrader: (5)	Im also going to add more power in the future. Hope you sort this out.
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09-28-2012, 01:20 PM	#7
kaigoss69 Brigadier General 300 Rep 3,969 Posts Drives: '08 335i Join Date: Jul 2008 Location: JAX iTrader: (6)	The popping, as far as I can tell, is definitely not related to the harness, and probably not the relay either. And yes, the pin 13 signal from the back of the HU has more than enough juice to turn on the ms-8. Andy W. already explained the reason for the popping over at DIYMA, although it may have been in connection with high-level amp outputs, not sure. It had to do with a voltage differential between the speaker-level outputs, and the ground, IIRC, but I'm no genius when it comes to electrical things... __________________ Mobridge DA2 > JBL MS-8 > ARC XDi 600/4 > JBL Gti 408 Mids & Vifa OT19 Tweeters; PG Ti2 1600.5 > Morel HCW-10 & IDMax 15
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09-28-2012, 01:23 PM	#8
kaigoss69 Brigadier General 300 Rep 3,969 Posts Drives: '08 335i Join Date: Jul 2008 Location: JAX iTrader: (6)	You can eliminate the turn-on signal as the source for the popping by bridging between the terminals between the 12V+ and remote. If you do that, it will still pop. I tried it already. __________________ Mobridge DA2 > JBL MS-8 > ARC XDi 600/4 > JBL Gti 408 Mids & Vifa OT19 Tweeters; PG Ti2 1600.5 > Morel HCW-10 & IDMax 15
	Appreciate 0 Quote

09-28-2012, 01:25 PM	#10
kaigoss69 Brigadier General 300 Rep 3,969 Posts Drives: '08 335i Join Date: Jul 2008 Location: JAX iTrader: (6)	Only way to get rid of it is to get a DA2, or get rid of the ms-8. __________________ Mobridge DA2 > JBL MS-8 > ARC XDi 600/4 > JBL Gti 408 Mids & Vifa OT19 Tweeters; PG Ti2 1600.5 > Morel HCW-10 & IDMax 15
	Appreciate 0 Quote

09-28-2012, 01:27 PM	#11
Technic Lieutenant General 2277 Rep 12,996 Posts Drives: 2021 i3S, 2024 i4 M50 Join Date: Apr 2005 Location: Florida iTrader: (18)	In my experience with 15+ MS-8 installs, any pop issue is at turn off and not at turn on. That is regardless of high or low inputs to the MS-8.
	Appreciate 0 Quote

09-28-2012, 02:35 PM	#13
mob17 Major General 400 Rep 5,623 Posts Drives: E92 335D Join Date: Mar 2012 Location: East Midlands, UK iTrader: (5)	FWIW i only have turn on pop. Nothing at turn off. The pop reduces significantly if i reduce the OEM base level on iDrive before starting the engine. There is also zero turn on pop when i start the car quick enough, i.e just before the ms-8 starts up.
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10-02-2012, 01:06 AM	#14
makkan00 Major General 886 Rep 9,097 Posts Drives: F83 and F36 Join Date: Dec 2011 Location: Essex iTrader: (56)	Taibanl, Any update on this? __________________ F36 Xdrive for her - HUD, park assist, heated steering wheel, rear camera, Apple car play F36 RWD for him - HK, M sports pack, GTS tail light, Apple car play
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10-02-2012, 05:10 AM	#15
taibanl Brigadier General 281 Rep 4,121 Posts Drives: BMW Join Date: Sep 2010 Location: NA iTrader: (4)	Sorry no current eta as to when I can do some wiring.
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