XSeries-forum

You have poor earth and a ground loop isolator will no doubt sort the problem. It will feed inline with the current RCA leads that go into the amp, try something like this.

Had it on mine... Oh and the back of the unit will have an earth cable (black). Check if that has remained in the loom (assuming you have the loom that runs the length of the car). If so, that's 5 metres in length and no good as an earth. You'll want to snip that close to the rear of the headunit (say 50 cms) and attach it somewhere behind the dash on bare metal to the chassis.

But try the groundloop isolator first, they're good and not too much outlay. Do a search as that's just an example of what to look for.

Not sure I can help but if close to you, welcome to help resolve.

I got the same noise after installing the parrot bluetooth,freeview and dvd player, got used to the noise now. Installers said that BMW's were prone to this......yeah right.

[quote=""Sanj""]You have poor earth and a ground loop isolator will no doubt sort the problem. It will feed inline with the current RCA leads that go into the amp, try something like this.

Had it on mine... Oh and the back of the unit will have an earth cable (black). Check if that has remained in the loom (assuming you have the loom that runs the length of the car). If so, that's 5 metres in length and no good as an earth. You'll want to snip that close to the rear of the headunit (say 50 cms) and attach it somewhere behind the dash on bare metal to the chassis.

But try the groundloop isolator first, they're good and not too much outlay. Do a search as that's just an example of what to look for.

Not sure I can help but if close to you, welcome to help resolve. [/quote]

Sanj my man, if you could post a photo where this actually plugs into, will it work only if you have new amp, i have just the factory fitted one. Sorry to the PO for barging in.

I'm going to state the obvious here but does John at Car Vision know what he's doing? Doesn't sound like it to me.

First and easiest thing to try is this http://www.maplin.co.uk/ground-loop-isolator-33172

Everything else starts to get a bit more complicated as it means re running earthing cables and moving the signal cables away from the power cables.

I dont know enough about the wiring of the DSP system but i would have thought the simplest and easiest way of doing all this would have been to just to change the head unit and the speakers.......not sure why you would need to have an amp aswell.

Not going to go too far off topic but i am a little disappointed with Car Vision at the moment as bought a hooligan from them.....tv never worked.....went back to john to have this fixed and hopefully a software update so the ipod menu wasnt in chinese.....got the unit back and no change. Have left messages for john to call me back but nothing. This has been going on for a couple of months!

thanks guys, still waiting for john to return my call I dont want to critisise john though, he worked his butt off to get it installed, I went to hime due to the positive reviews on here for his great customer service, just hope im not going to be the exception.

sanj where does the ground loop connect to? do you have any instructions/pics that could be helpfull? im in lancashire so nowhere near you but i really appreciate the offer of help.

thanks
janette

[quote=""kellyleekyle""]sanj where does the ground loop connect to? do you have any instructions/pics that could be helpfull? im in lancashire so nowhere near you but i really appreciate the offer of help.

thanks
janette[/quote]

Hi Janette, apologies for the late response, can you expand on your setup? Do you have the OEM amp setup and just new speakers with the new headunit? Or more?

Hi sanj

He took the dsp amp out and fitted a new kenwood amp, original speakers left in, this is what he's put on invoice

Head unit
Wiring kit
Reverse camera
Tv antenna
Amp
Crossovers
Ext amp kit
RCA AV

Don't know if that helps
Janette

The amp is what we're interested in then (the new one). Look to see if it has some RCA (phono) wires going into it (these will be the one's we put the isolator I linked to inline).

Nothing scary, just a case of unplug them from the amp, put them into the isolator and then put the other end of the isolator cables into the amp. But I need to know if you have some in there and what the label is on the amp. Picture worth a thousand words!

Try to see what the gain is turned up to on the amp too (too high and it's sensitive to picking up this type of noise). Balancing act now!

thanks for your help sanj, ill have to wait till hubby get home with the x5 (im using his till the noice is sorted) Ill take some photos and post here for you to see.

janette

Hi Sanj,

not sure if these help, this is all i can see as its mounted in the side of the car







this is the earth i think















thanks
janette

I'll check these in the morning on a proper PC! Work poxy server prohibits pics beeing seen and of course on the iPhone I see bugger all (too small).

May need better pics from inital look on phone as I can't see what they connect to - no labelling of the amp..

Hi Janette,

Does help - those are all the speaker cables going 'out' of the amp to the speakers in each door/dash.

What we need to know is how they are coming 'in' from the headunit to the amp.

On the amp there will be speaker inputs, just like you have the speaker output pictured. That speaker input could be in the form of speaker wires or (hopefully) RCA/phono cables - 2 pairs (front right/left and rear right/left). That's what we want for the ground loop isolator.

The pain may be that they're connected to the other end of the amp (and of course out of your comfort zone to mess about with) - can you get me the make of this amp and I can try to google a wiring diagram???

Hi sanj

All I know is it's a kenwood amp, out of the 2 options he have me, it was the lower end amp as the higher end was more for a large sound system with sub etc. sorry but he didn't say anything else, nothing is visible on the amp

thanks
Janette

Need that info to progress further...