Stock sub Aftermarket HU

Sonic Yellow 2K3 WRX · 03-26-2004, 10:21 AM

How would one have to wire things to use the stock sub with an aftermarket 4 channel head unit?

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Mulder · 03-26-2004, 10:46 AM

Just plug it in. The sub is connected with a bridging harness that taps signal from the rear speaker outputs. As long as you are installing a HU that has an internal amplifier the sub will still work. If the HU is preamp-only then it won't.
I have an Alpine with the stock sub.

Sonic Yellow 2K3 WRX · 03-26-2004, 11:15 AM

Quote:

Originally posted by Mulder
Just plug it in. The sub is connected with a bridging harness that taps signal from the rear speaker outputs. As long as you are installing a HU that has an internal amplifier the sub will still work. If the HU is preamp-only then it won't.
I have an Alpine with the stock sub.

Thanks, so no splicing is necessary, it is already done, in effect?

Thanks.

Mulder · 03-26-2004, 03:49 PM

Correct. The connector that plugs into the HU (stock or aftermarket) is part of the sub harness, so as long as you plug it right back into your new unit the sub will work.

calhoon · 03-27-2004, 09:16 AM

My 03 WRX did not come with the subwoofer. I have a ysed one I want to add but I did not get the harness/ jumper for the head unit. Subaru wants $168 for this!!!!! Is there abetter source for this harness?

Mulder · 03-27-2004, 09:20 AM

Unfortunately, no. When looking to purchase a used OEM sub it's very important to make sure the complete harness is included. Often it's missing or has been cut when removing the sub from the car.
If you have the partial harness with the connector that plugs into the sub it may be possible to make the other end using harness adapters sold for installing aftermarket HUs.

Sonic Yellow 2K3 WRX · 03-27-2004, 12:40 PM

Quote:

Originally posted by Mulder
Unfortunately, no. When looking to purchase a used OEM sub it's very important to make sure the complete harness is included. Often it's missing or has been cut when removing the sub from the car.
If you have the partial harness with the connector that plugs into the sub it may be possible to make the other end using harness adapters sold for installing aftermarket HUs.

My car had a sub stock...I removed it...Just unplugged the cable and sold the sub...Still have the stock wiring harness that I want to go back to...

So should I be OK when I use a crutchfield adapter to go from the aftermarket hu to the stock plug...?

Mulder · 03-27-2004, 01:31 PM

Yes, that's what I did.

calhoon · 03-27-2004, 04:30 PM

Well I guess Ill have to sell the sub I have. I've got $100 in the sub and for another $168 I could do much better.

jcholak718 · 04-08-2004, 02:15 PM

I figure I'll post here since I have a similar question:

I've got the Pioneer DVH-P5000MP HU and I was thinking about keeping my OEM sub just for some fill, can I do it? My HU has 50Wx4, but it also has 2 sets of preamp outputs. I'm planning on running my front components off of my 2 channel amp, and running the rear coaxials off the HU for some backseat fill. Is it still possible for me to keep the the sub?

Thanks,
Jon

Mulder · 04-08-2004, 05:12 PM

Yes the sub will work. Using the RCA outs of your HU to run an external amp won't make any difference as long as the rear speaker outputs are still active.
Depending on how much power your amp has however, the sub might not balance well with it, but it costs nothing to try.

jcholak718 · 04-08-2004, 05:39 PM

Yeah it'll probably be a lost cause, but I appreciate your help.

PossumK · 04-08-2004, 07:45 PM

Does the OEM subwoofer's harness have wires for the low-level inputs from aftermarket HU RCA jacks? I wish I could use the subwoofer setting in my Alpine amp, since I've read it's a pain to get to adjusters on the subwoofer.

-Greg

Mulder · 04-08-2004, 07:52 PM

No, it's speaker-level inputs only. If you want to use the sub features in your Alpine you'll need an aftermarket sub with line-level inputs.
I feel your pain since I have the same setup with my Alpine and the stock sub. So far it hasn't bothered me enough to get another one.

03-26-2004, 10:21 AM	#1
Sonic Yellow 2K3 WRX Scooby Newbie Member#: 33236 Join Date: Feb 2003	Stock sub Aftermarket HU How would one have to wire things to use the stock sub with an aftermarket 4 channel head unit? * Registered users of the site do not see these ads.

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03-26-2004, 10:46 AM	#2
Mulder Trust no one Moderator Member#: 11170 Join Date: Oct 2001 Chapter/Region: Tri-State Location: NYC Vehicle: 02 RAV4 MT 15 WRX/11 CRZ	Just plug it in. The sub is connected with a bridging harness that taps signal from the rear speaker outputs. As long as you are installing a HU that has an internal amplifier the sub will still work. If the HU is preamp-only then it won't. I have an Alpine with the stock sub.

03-26-2004, 03:49 PM	#4
Mulder Trust no one Moderator Member#: 11170 Join Date: Oct 2001 Chapter/Region: Tri-State Location: NYC Vehicle: 02 RAV4 MT 15 WRX/11 CRZ	Correct. The connector that plugs into the HU (stock or aftermarket) is part of the sub harness, so as long as you plug it right back into your new unit the sub will work.

03-27-2004, 09:16 AM	#5
calhoon Scooby Newbie Member#: 38742 Join Date: Jun 2003 Location: Detroit Metro Area Vehicle: 2003 WRX Pearl Blue	My 03 WRX did not come with the subwoofer. I have a ysed one I want to add but I did not get the harness/ jumper for the head unit. Subaru wants $168 for this!!!!! Is there abetter source for this harness?

03-27-2004, 09:20 AM	#6
Mulder Trust no one Moderator Member#: 11170 Join Date: Oct 2001 Chapter/Region: Tri-State Location: NYC Vehicle: 02 RAV4 MT 15 WRX/11 CRZ	Unfortunately, no. When looking to purchase a used OEM sub it's very important to make sure the complete harness is included. Often it's missing or has been cut when removing the sub from the car. If you have the partial harness with the connector that plugs into the sub it may be possible to make the other end using harness adapters sold for installing aftermarket HUs.

03-27-2004, 01:31 PM	#8
Mulder Trust no one Moderator Member#: 11170 Join Date: Oct 2001 Chapter/Region: Tri-State Location: NYC Vehicle: 02 RAV4 MT 15 WRX/11 CRZ	Yes, that's what I did.

03-27-2004, 04:30 PM	#9
calhoon Scooby Newbie Member#: 38742 Join Date: Jun 2003 Location: Detroit Metro Area Vehicle: 2003 WRX Pearl Blue	Well I guess Ill have to sell the sub I have. I've got $100 in the sub and for another $168 I could do much better.

04-08-2004, 02:15 PM	#10
jcholak718 Scooby Specialist Member#: 54978 Join Date: Feb 2004 Chapter/Region: TXIC Location: Obviously not at home Vehicle: Oh, aren't ordinary people adorable?	I figure I'll post here since I have a similar question: I've got the Pioneer DVH-P5000MP HU and I was thinking about keeping my OEM sub just for some fill, can I do it? My HU has 50Wx4, but it also has 2 sets of preamp outputs. I'm planning on running my front components off of my 2 channel amp, and running the rear coaxials off the HU for some backseat fill. Is it still possible for me to keep the the sub? Thanks, Jon

04-08-2004, 05:12 PM	#11
Mulder Trust no one Moderator Member#: 11170 Join Date: Oct 2001 Chapter/Region: Tri-State Location: NYC Vehicle: 02 RAV4 MT 15 WRX/11 CRZ	Yes the sub will work. Using the RCA outs of your HU to run an external amp won't make any difference as long as the rear speaker outputs are still active. Depending on how much power your amp has however, the sub might not balance well with it, but it costs nothing to try.

04-08-2004, 05:39 PM	#12
jcholak718 Scooby Specialist Member#: 54978 Join Date: Feb 2004 Chapter/Region: TXIC Location: Obviously not at home Vehicle: Oh, aren't ordinary people adorable?	Yeah it'll probably be a lost cause, but I appreciate your help.

04-08-2004, 07:45 PM	#13
PossumK Scooby Specialist Member#: 53548 Join Date: Jan 2004 Chapter/Region: SCIC Location: Redondo Beach, CA Vehicle: 2004 WRX PSM (sold) 2007 S2000	Does the OEM subwoofer's harness have wires for the low-level inputs from aftermarket HU RCA jacks? I wish I could use the subwoofer setting in my Alpine amp, since I've read it's a pain to get to adjusters on the subwoofer. -Greg

04-08-2004, 07:52 PM	#14
Mulder Trust no one Moderator Member#: 11170 Join Date: Oct 2001 Chapter/Region: Tri-State Location: NYC Vehicle: 02 RAV4 MT 15 WRX/11 CRZ	No, it's speaker-level inputs only. If you want to use the sub features in your Alpine you'll need an aftermarket sub with line-level inputs. I feel your pain since I have the same setup with my Alpine and the stock sub. So far it hasn't bothered me enough to get another one.