Hk sub wiring - Page 2

Bobble · 30th December 2015, 16:18

After some investigating today it seems there is a blue/white amp remote wire redundent on the headunit. I think this needs to be connected to something to power the amp so would explain no sub. Any ideas on where to connect it ? If it's to complecated thinking maybe put the old H/U back

Jakg · 30th December 2015, 16:39

Quote:

Originally Posted by Bobble

After some investigating today it seems there is a blue/white amp remote wire redundent on the headunit. I think this needs to be connected to something to power the amp so would explain no sub. Any ideas on where to connect it ? If it's to complecated thinking maybe put the old H/U back

Explained here - http://www.the75andztclub.co.uk/foru...ad.php?t=64566

But I doubt the rest of the speakers would work if the amp wasn't on.

Bobble · 30th December 2015, 19:20

Yes this is where i go to confused.com Jack. Unless the remote wire is connected the amp wont work. There doesn't appear to be anything from the rear tweeters either. Guess if i pull the connectors off the amp and I still have sound the H/U can't be on the H/K loom. Due to the standard of DIY i've come across it doesn't inspire confidence that something isn't how it's supposed to be.

Just pulled both plugs from amp and still got sound. Some tracing of looms next.

Jakg · 30th December 2015, 23:35

It seems I'm the only person replying here, but I'm struggling to properly understand the problem your having, probably because your drip feeding questions without giving us the full backstory.

If you do need any further help, and you'd like a reply, are you able to provide a little more backstory as to the problem your experiencing?

Hope you understand what I mean - it's just my lack of comprehension!

Bobble · 31st December 2015, 10:28

Appriciate your interest Jack and yes it's bit of a strange one. Bought the car a few months ago and was told it had the H/K set up installed. The bass quality was pretty poor so was looking to improve this. In place I had a VDO H/U, boot CD changer and the XQK 100190 amp mounted underneath. This is when I found out there was no sub fitted. I put a Sony Xplode H/U in and although the quality was better it still isn't what I am after. I bought the sub thinking it it would simply plug into the 4 pin molex connector (situated near the rear parcel shelf) from the amp loom and boom away. Checked molex plug for power and it came up dead. Back to Sony H/U where I found the AMP REM lead not connected to anything. Looked into this and found it should be connected to something to switch the amp on. So now I'm assuming the Amp is powerless. I've disconnected and removed the Amp altogether now but still have the stereo working as before. This is where I'm getting a tad stumped. If the loom from the H/U goes to the Amp then to the speakers would the stereo still be working with the Amp is removed

. I'm thinking not. So maybe the loom attached to the Amp is not the one I have attached to the H/U. I could go down the line of tracing it back but think, first off, I will connect the original VDO H/U to see if that fires the Amp up. Any replies are much appriciated and, as you have been the only one to reply, I realize this is not a straight forward issue to reslove. Thanks for reading and trying to make sense of it anyway JacK.

Jakg · 31st December 2015, 10:43

Quote:

Originally Posted by Bobble

Appriciate your interest Jack and yes it's bit of a strange one. Bought the car a few months ago and was told it had the H/K set up installed. The bass quality was pretty poor so was looking to improve this. In place I had a VDO H/U, boot CD changer and the XQK 100190 amp mounted underneath. This is when I found out there was no sub fitted. I put a Sony Xplode H/U in and although the quality was better it still isn't what I am after. I bought the sub thinking it it would simply plug into the 4 pin molex connector (situated near the rear parcel shelf) from the amp loom and boom away. Checked molex plug for power and it came up dead. Back to Sony H/U where I found the AMP REM lead not connected to anything. Looked into this and found it should be connected to something to switch the amp on. So now I'm assuming the Amp is powerless. I've disconnected and removed the Amp altogether now but still have the stereo working as before. This is where I'm getting a tad stumped. If the loom from the H/U goes to the Amp then to the speakers would the stereo still be working with the Amp is removed

. I'm thinking not. So maybe the loom attached to the Amp is not the one I have attached to the H/U. I could go down the line of tracing it back but think, first off, I will connect the original VDO H/U to see if that fires the Amp up. Any replies are much appriciated and, as you have been the only one to reply, I realize this is not a straight forward issue to reslove. Thanks for reading and trying to make sense of it anyway JacK.

Ok I think I understand now.

It certainly does sound odd - with the loom installed properly, and the amp not connected, there is simply no connection between the speaker ISO pins at the stereo end, and the speakers themselves. They get as far as the amplifier, which is where they get joined together.

As you've worked out, this must mean something isn't connected.

Does your parcel shelf have the grille in it for the sub? If not, and from the fact it didn't come with the sub (or the fixings scrivet plastic things in the boot?), it's likely it didn't come with it from the factory.

I would wager perhaps someone attempted the retrofit, got as far as partially installing the wiring and just never bothered finishing it?

Bobble · 31st December 2015, 11:28

Yes it has the grille and i'm with you that this was another project that got a bit complicated for a buget DIYer who didn't have the know how to do it or the cash to get someone else to do it. Hacked off a bit that he used the H/K set up as a selling point though. Probably leave it until I have some spare time in the new year now to start from scratch. The Sony H/U isn't to bad for now lol.

Many Thanks Jack,

awvc1 · 1st January 2016, 22:26

If your head unit has pre outs, i'd really recommend forgetting the hk amp, and picking up a cheap 2 channel amp and wiring that in its place. you will get much better quality bass out of it. I have an hk amp upstairs i never used for this reason.

Bobble · 2nd January 2016, 12:01

I do have RCA Audio out rear/sub on the H/U. If this is what's needed to plug and play a different amp it may well save me a lot of time and effort chasing back the other wiring loom. Thanks for the recomendation Tony.

30th December 2015, 19:20	#13
Bobble Newbie MG ZT CDTi Join Date: Aug 2015 Location: Medway Posts: 28 Thanks: 0 Thanked 3 Times in 3 Posts	Yes this is where i go to confused.com Jack. Unless the remote wire is connected the amp wont work. There doesn't appear to be anything from the rear tweeters either. Guess if i pull the connectors off the amp and I still have sound the H/U can't be on the H/K loom. Due to the standard of DIY i've come across it doesn't inspire confidence that something isn't how it's supposed to be. Just pulled both plugs from amp and still got sound. Some tracing of looms next. Last edited by Bobble; 30th December 2015 at 19:56..

1st January 2016, 22:26	#18
awvc1 Posted a thing or two Rover 75 Saloon Join Date: Jan 2015 Location: Essex Posts: 1,177 Thanks: 221 Thanked 258 Times in 196 Posts	If your head unit has pre outs, i'd really recommend forgetting the hk amp, and picking up a cheap 2 channel amp and wiring that in its place. you will get much better quality bass out of it. I have an hk amp upstairs i never used for this reason. __________________ White Gold ConnSE, 2003 Mods: FBH Revotec Fan Inline 'stat Xenon lights + washers BMW MK4 satnav, clock mod, BT ulf, 16:9 screen & TV upgraded BM54 + BT Aux-in Miracast box Glasses holder Flip Key Spyhole +Jules plenum shield PPD - badges,rear plinth, carpeted heater panels, anchor bolts, reflectors Walnut Dash, handbrake+gearshift Twin Horns Drivers cupholder HK Speakers Chrome bullet mirrors Digital speedo LED interior bulbs Resler interface USB charging sockets x2

30th December 2015, 16:18	#11
Bobble Newbie MG ZT CDTi Join Date: Aug 2015 Location: Medway Posts: 28 Thanks: 0 Thanked 3 Times in 3 Posts	After some investigating today it seems there is a blue/white amp remote wire redundent on the headunit. I think this needs to be connected to something to power the amp so would explain no sub. Any ideas on where to connect it ? If it's to complecated thinking maybe put the old H/U back

30th December 2015, 23:35	#14
Jakg This is my second home N/A Join Date: Feb 2010 Location: Suffolk Posts: 6,867 Thanks: 0 Thanked 397 Times in 302 Posts	It seems I'm the only person replying here, but I'm struggling to properly understand the problem your having, probably because your drip feeding questions without giving us the full backstory. If you do need any further help, and you'd like a reply, are you able to provide a little more backstory as to the problem your experiencing? Hope you understand what I mean - it's just my lack of comprehension!

31st December 2015, 10:28	#15
Bobble Newbie MG ZT CDTi Join Date: Aug 2015 Location: Medway Posts: 28 Thanks: 0 Thanked 3 Times in 3 Posts	Appriciate your interest Jack and yes it's bit of a strange one. Bought the car a few months ago and was told it had the H/K set up installed. The bass quality was pretty poor so was looking to improve this. In place I had a VDO H/U, boot CD changer and the XQK 100190 amp mounted underneath. This is when I found out there was no sub fitted. I put a Sony Xplode H/U in and although the quality was better it still isn't what I am after. I bought the sub thinking it it would simply plug into the 4 pin molex connector (situated near the rear parcel shelf) from the amp loom and boom away. Checked molex plug for power and it came up dead. Back to Sony H/U where I found the AMP REM lead not connected to anything. Looked into this and found it should be connected to something to switch the amp on. So now I'm assuming the Amp is powerless. I've disconnected and removed the Amp altogether now but still have the stereo working as before. This is where I'm getting a tad stumped. If the loom from the H/U goes to the Amp then to the speakers would the stereo still be working with the Amp is removed . I'm thinking not. So maybe the loom attached to the Amp is not the one I have attached to the H/U. I could go down the line of tracing it back but think, first off, I will connect the original VDO H/U to see if that fires the Amp up. Any replies are much appriciated and, as you have been the only one to reply, I realize this is not a straight forward issue to reslove. Thanks for reading and trying to make sense of it anyway JacK.

31st December 2015, 11:28	#17
Bobble Newbie MG ZT CDTi Join Date: Aug 2015 Location: Medway Posts: 28 Thanks: 0 Thanked 3 Times in 3 Posts	Yes it has the grille and i'm with you that this was another project that got a bit complicated for a buget DIYer who didn't have the know how to do it or the cash to get someone else to do it. Hacked off a bit that he used the H/K set up as a selling point though. Probably leave it until I have some spare time in the new year now to start from scratch. The Sony H/U isn't to bad for now lol. Many Thanks Jack,

2nd January 2016, 12:01	#19
Bobble Newbie MG ZT CDTi Join Date: Aug 2015 Location: Medway Posts: 28 Thanks: 0 Thanked 3 Times in 3 Posts	I do have RCA Audio out rear/sub on the H/U. If this is what's needed to plug and play a different amp it may well save me a lot of time and effort chasing back the other wiring loom. Thanks for the recomendation Tony.