Amplifier wiring correction!

jonywalker · 09-21-2008, 04:05 PM

HIFI

Radio to Amplifier
FRONT LEFT
Yellow/Red +
Brown/Gold -

FRONT RIGHT
Blue/Red +
Brown/Gold -

REAR LEFT
Yellow/Black +
Brown/Gold -

REAR RIGHT
Blue/Black +
Brown/Gold -

There is a proved mistake above. The FRONT LEFT should either be
Brown/Gold +
Yellow/Red -
or
both the amp to Front Left speaker and amp to Front Left Sub are wrong

I firstly detected this wrong polarity as I added a amp for subs. I thought my amp might be a product with small mistake. Later, I added a second amp to play highs and mids, I encountered the same problem. It is impossible that these two amps are all wrong for polarity.
If I followed the wring plan of "Ultimate amplifier wiring quide" then I have had not only the wrong poled subs, but also also wrong poled front left channels.
I opened the door panel to check the speaker wiring, nothing was wrong. It is now clear the Ultimate amp..quide has a mistake. But the color coding seems to be logically correct. I don't think I have had an individual product error in my oem system, because such error cannot be individual. Is it a joke made by BMW, or a mystery?

jonywalker · 09-22-2008, 08:22 PM

oh my god, how did the audio specialists do their professional job, 3 speakers of totally 6 channels were wrong connected, and totally 12 clips of door panel were damaged

. I corrected all these mists by myself as I finally took the chance to modify the passive xovers inside the door panels today. How could I count on such sucks to do their jobs!
Good news is I finally got it, the sound is now highly definite and accurate!

fdiprete · 09-23-2008, 06:14 AM

How did you determine that the polarity is reversed on that channel?
I am going to use the diagram for an install soon and would like to check mine.

jonywalker · 09-23-2008, 09:28 AM

Sorry its my fault, or more exactly, the fault of my carhifi-dealer. It is only possible to know whether or not the sound system is in phase by listening (experience needed), but no one is able to know which channel has the wrong polarity, that was my problem. I exchanged the ploarity of my front left channel at the amp output, I got the better result, I checked the left front speaker wiring inside the door panel for correctness so I claimed the diagram was wrong. The real faults were my other channel speaker were reversely connected. Actually you could have all speakers connected reversely, but not partly.
If you feel the sound effects are quite artificial then it is probably not in phase.
My hifi-installer has null knowledge, 5 of 10 speakers were wrong connected.

09-21-2008, 04:05 PM	#1
jonywalker Private First Class 8 Rep 105 Posts Drives: BMW E91 325d Join Date: Oct 2007 Location: Munich iTrader: (0)	Amplifier wiring correction! HIFI Radio to Amplifier FRONT LEFT Yellow/Red + Brown/Gold - FRONT RIGHT Blue/Red + Brown/Gold - REAR LEFT Yellow/Black + Brown/Gold - REAR RIGHT Blue/Black + Brown/Gold - There is a proved mistake above. The FRONT LEFT should either be Brown/Gold + Yellow/Red - or both the amp to Front Left speaker and amp to Front Left Sub are wrong I firstly detected this wrong polarity as I added a amp for subs. I thought my amp might be a product with small mistake. Later, I added a second amp to play highs and mids, I encountered the same problem. It is impossible that these two amps are all wrong for polarity. If I followed the wring plan of "Ultimate amplifier wiring quide" then I have had not only the wrong poled subs, but also also wrong poled front left channels. I opened the door panel to check the speaker wiring, nothing was wrong. It is now clear the Ultimate amp..quide has a mistake. But the color coding seems to be logically correct. I don't think I have had an individual product error in my oem system, because such error cannot be individual. Is it a joke made by BMW, or a mystery?
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09-22-2008, 08:22 PM	#2
jonywalker Private First Class 8 Rep 105 Posts Drives: BMW E91 325d Join Date: Oct 2007 Location: Munich iTrader: (0)	oh my god, how did the audio specialists do their professional job, 3 speakers of totally 6 channels were wrong connected, and totally 12 clips of door panel were damaged . I corrected all these mists by myself as I finally took the chance to modify the passive xovers inside the door panels today. How could I count on such sucks to do their jobs! Good news is I finally got it, the sound is now highly definite and accurate!
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09-23-2008, 06:14 AM	#3
fdiprete First Lieutenant 21 Rep 339 Posts Drives: 2014 512i xdrive Join Date: Jul 2008 Location: NH iTrader: (2)	How did you determine that the polarity is reversed on that channel? I am going to use the diagram for an install soon and would like to check mine.
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09-23-2008, 09:28 AM	#4
jonywalker Private First Class 8 Rep 105 Posts Drives: BMW E91 325d Join Date: Oct 2007 Location: Munich iTrader: (0)	Sorry its my fault, or more exactly, the fault of my carhifi-dealer. It is only possible to know whether or not the sound system is in phase by listening (experience needed), but no one is able to know which channel has the wrong polarity, that was my problem. I exchanged the ploarity of my front left channel at the amp output, I got the better result, I checked the left front speaker wiring inside the door panel for correctness so I claimed the diagram was wrong. The real faults were my other channel speaker were reversely connected. Actually you could have all speakers connected reversely, but not partly. If you feel the sound effects are quite artificial then it is probably not in phase. My hifi-installer has null knowledge, 5 of 10 speakers were wrong connected.
	Appreciate 0 Quote