MX RCA cable and alternator whine :( - Team-BHP

nitrous · 20th August 2007, 18:27

Taking the suggestion here for VFM RCA interconnects, I went ahead and bought 3 MX original RCA interconnects from the regional distributor in chennai.

Im using one Tsunami RCA cable and one MX RCA cable for the 4ch amp.
The installation is ok and the power wires to the amp are on the left side of the car while the RCAs run through the driver side of the car. After the install, the sound was good and i was happy. But, when i started the car to leave, misery of miseries, there was a whole lot of alternator noise in the music and i just couldn't stand it.

This is my experience with the MX RCA cable and I will update this if I get to diagnose the problem(defective cable maybe) and solve it.

rocksterraghu · 20th August 2007, 18:59

Quote:

Originally Posted by nitrous

I went ahead and bought 3 MX original RCA interconnects

By the way, why 3? Do you have another amp driving the sub? Even if you did, one more would have sufficed along with your Tsunami, right?

s0uljah · 20th August 2007, 19:30

Pioneer HU na?

Nitrous anna, all you need to do is ground the RCA jacks to the HU. Will post the pic shortly.

A Simple copper wire around the rca jacks of the HU to a screw on the back of the HU will suffice.

MX cables for the win

nitrous · 20th August 2007, 19:37

Yes,muscle man.
The new Pioneer 6950 has found asylum in my humble Ikon.
And whats this new thing about grounding RCA cables??

rocksterraghu · 20th August 2007, 20:16

Quote:

Originally Posted by s0uljah

Holy sweet Jesus! What in the world is that?

P.S: Mods, please delete/ignore the repeated post of mine, that happened due to the browser/network connection problem. Sorry for the trouble

flipsyde · 20th August 2007, 21:16

guys i've been happening the same problem in a scorpio. the whine is primarily from the right component speakers.

can someone double confirm this RCA cable grounding bit?

s0uljah · 20th August 2007, 21:48

http://www.team-bhp.com/forum/search...archid=1582387

Quote:

Originally Posted by nitrous

Yes,muscle man.
The new Pioneer 6950 has found asylum in my humble Ikon.
And whats this new thing about grounding RCA cables??

Oye!!!!

This is a prevailing and documented error in Pioneer HU's. I think Iv read on other forums that even the high end HU suffer from this issue.

It's an easy DIY or just goto your installer and have them do it. While they are doing it keep the car running, you will know instantly when its fixed.

Quote:

Originally Posted by rocksterraghu

Holy sweet Jesus! What in the world is that?

Basically the copper wire in the picture eliminates the "ground loop" problem which causes the whine.

Quote:

Originally Posted by flipsyde

guys i've been happening the same problem in a scorpio. the whine is primarily from the right component speakers.

can someone double confirm this RCA cable grounding bit?

What exactly do you need confirmed ? Also are your power cables/RCA's running on the same side or have they been routed on different sides?

flipsyde · 20th August 2007, 22:12

the power cables run along the gearbox while the RCA cables run along the front passenger door. the amp is installed right below the front passenger.

esteem_lover · 20th August 2007, 23:06

I find this most amusing. I think our in house pioneer master LBM should be able to shed more light on this one. The picture here looks more horrendous than all the sonys i have seen in my life.

Hope you guys are happy after all this.
cheers

low_bass_makker · 20th August 2007, 23:23

John some pioneer HU have some ground issue so the above method is used to get rid of the whine....it has been posted here by s0uljah

http://www.team-bhp.com/forum/413720-post5726.html (Car Audio Advice from the Audio Gurus: Use "Search thread" before posting a new Q!)

It is a normal thing to do...

speedzak · 20th August 2007, 23:54

You will have to check which RCA is causing this leaky problem. As told, disconnecting each will give you the answer.

Souljah's solution is very much unavoidable in some Pio HUs.

clipto333 · 21st August 2007, 00:02

hi,

there is a fuse in the HU which blows when one is careless with the wires. this happens when the hot pin i.e. the inner pin of the rca jack comes in contact with the ground.

the wire you see is the solution to this problem or you can get the hu checked and replace the SMD fuse or bypass it.

i have used both the methods and im still using the wire thing on my 6850 without any problem. nothing to worry about. its been quite a while im using the wire thing.

check with a different HU, if the whine goes then your HU is the culprit.

the fuse in my case was blown because of my faulty amp.

cheers
clip

madbullram · 21st August 2007, 00:03

Thats strange man....I have the same HU and its working perfect...and since I was looking at an upgrade didnt even buy Tsunami or MX bought a chinese cheap RCA for the Kicker AMP (dont curse will upgrade)...but i didnt see any problem.

And I didnt run the power cables seperately either...left side has power+rca of Sub and Right has power+rcas for 4-channel amp

Where did you install?

esteem_lover · 21st August 2007, 00:10

Quote:

Originally Posted by madbullram

Where did you install?

A million dollar question. This is where we make compromises & end up spending more than we ought to.

irfanmon · 21st August 2007, 00:28

I have MX RCA to connect ipod to my HU as aux. No problems till today. It could be a faulty job.

20th August 2007, 18:27	#1 (permalink)
nitrous Senior - BHPian Join Date: May 2004 Location: Motorcity Madras Posts: 4,019 View My Garage	MX RCA cable and alternator whine :( Taking the suggestion here for VFM RCA interconnects, I went ahead and bought 3 MX original RCA interconnects from the regional distributor in chennai. Im using one Tsunami RCA cable and one MX RCA cable for the 4ch amp. The installation is ok and the power wires to the amp are on the left side of the car while the RCAs run through the driver side of the car. After the install, the sound was good and i was happy. But, when i started the car to leave, misery of miseries, there was a whole lot of alternator noise in the music and i just couldn't stand it. This is my experience with the MX RCA cable and I will update this if I get to diagnose the problem(defective cable maybe) and solve it. __________________ Maruti - Everyone comes home with rattles

20th August 2007, 19:30	#3 (permalink)
s0uljah Senior - BHPian Join Date: Feb 2006 Location: BLR Posts: 1,830 View My Garage	Pioneer HU na? Nitrous anna, all you need to do is ground the RCA jacks to the HU. Will post the pic shortly. A Simple copper wire around the rca jacks of the HU to a screw on the back of the HU will suffice. MX cables for the win __________________ "I’m in no condition to drive…wait! I shouldn’t listen to myself, I’m drunk!" - Homer J. Simpson Last edited by s0uljah : 20th August 2007 at 19:37. Reason: added pic

20th August 2007, 19:37	#4 (permalink)
nitrous Senior - BHPian Join Date: May 2004 Location: Motorcity Madras Posts: 4,019 View My Garage	Yes,muscle man. The new Pioneer 6950 has found asylum in my humble Ikon. And whats this new thing about grounding RCA cables?? __________________ Maruti - Everyone comes home with rattles

20th August 2007, 21:16	#6 (permalink)
flipsyde BHPian Join Date: Nov 2006 Location: Chennai Posts: 355	guys i've been happening the same problem in a scorpio. the whine is primarily from the right component speakers. can someone double confirm this RCA cable grounding bit? __________________ An architect's most useful tools are an eraser at the drafting board, and a wrecking bar at the site - Frank Lloyd Wright

20th August 2007, 22:12	#8 (permalink)
flipsyde BHPian Join Date: Nov 2006 Location: Chennai Posts: 355	the power cables run along the gearbox while the RCA cables run along the front passenger door. the amp is installed right below the front passenger. __________________ An architect's most useful tools are an eraser at the drafting board, and a wrecking bar at the site - Frank Lloyd Wright

20th August 2007, 23:06	#9 (permalink)
esteem_lover Senior - BHPian Join Date: Jul 2006 Location: Madras Posts: 4,963 View My Garage	I find this most amusing. I think our in house pioneer master LBM should be able to shed more light on this one. The picture here looks more horrendous than all the sonys i have seen in my life. Hope you guys are happy after all this. cheers __________________ If you can use, some exotic booze, Theres a bar in far bombay Come fly with me, we'll fly we'll fly away - Frank Sinatra

20th August 2007, 23:23	#10 (permalink)
low_bass_makker Senior - BHPian Join Date: Mar 2006 Location: Faridabad Posts: 5,742 View My Garage	John some pioneer HU have some ground issue so the above method is used to get rid of the whine....it has been posted here by s0uljah http://www.team-bhp.com/forum/413720-post5726.html (Car Audio Advice from the Audio Gurus: Use "Search thread" before posting a new Q!) It is a normal thing to do... __________________ Looks Can Be Deceiving

20th August 2007, 23:54	#11 (permalink)
speedzak Senior - BHPian Join Date: Mar 2006 Location: Cochin. ICE travelling in my Qualis! Posts: 3,349 View My Garage	You will have to check which RCA is causing this leaky problem. As told, disconnecting each will give you the answer. Souljah's solution is very much unavoidable in some Pio HUs. __________________ I have often regretted my speech, never my silence.

21st August 2007, 00:02	#12 (permalink)
clipto333 BHPian Join Date: Dec 2006 Location: jalandhar Posts: 910 View My Garage	hi, there is a fuse in the HU which blows when one is careless with the wires. this happens when the hot pin i.e. the inner pin of the rca jack comes in contact with the ground. the wire you see is the solution to this problem or you can get the hu checked and replace the SMD fuse or bypass it. i have used both the methods and im still using the wire thing on my 6850 without any problem. nothing to worry about. its been quite a while im using the wire thing. check with a different HU, if the whine goes then your HU is the culprit. the fuse in my case was blown because of my faulty amp. cheers clip Last edited by clipto333 : 21st August 2007 at 00:06.

21st August 2007, 00:03	#13 (permalink)
madbullram BHPian Join Date: Oct 2006 Location: Chennai & Appleton, WI Posts: 294 View My Garage	Thats strange man....I have the same HU and its working perfect...and since I was looking at an upgrade didnt even buy Tsunami or MX bought a chinese cheap RCA for the Kicker AMP (dont curse will upgrade)...but i didnt see any problem. And I didnt run the power cables seperately either...left side has power+rca of Sub and Right has power+rcas for 4-channel amp Where did you install?

21st August 2007, 00:28	#15 (permalink)
irfanmon BHPian Join Date: May 2006 Location: Gods own country Posts: 36	I have MX RCA to connect ipod to my HU as aux. No problems till today. It could be a faulty job. __________________ An adventure is only an inconvenience rightly considered.an inconvenience is an adventure wrongly considered!!!

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