This thread is for questions, suggestions, updates, etc. about the FAQ thread

Stock head unit information -- pin-outs, subwoofer, aux inputs, and more

Please post your questions here, not there!

If you have a question related to your own car, please be sure to post the model, year, and country where the car was originally sold.

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sub signal out question. I have a US 04 forester.
I replaced the 6x9 stock sub in the trunk with an aftermarket 8". Will I get better bass quality if I connect my LOC to the signal from the sub out instead of the rear outs? If so, is it possible to bridge the LOC connection to the sub signal ? I ask because I plan to bridge the speaker wires at the amp?

thanks!

I thought I'd add something to the Aux-in discussions, particularly concerning the rectangular CD changer connector on some newer HUs. I saw a Subaru 6disc head unit on eBay while I was looking for cheap Mazda stock HUs and noticed that it had the exact same CD changer connector form factor.

'9?-'01 Mazdas have a CD changer connector with a very, very, very similar pinout. In fact, almost all the pins are the same - except for a few which are labeled as Not Connected on the Subaru.

Miata.net has a pinout. I'd post a link but your forum software won't let me. At any rate, go to Miata.net -> Garage -> Audio -> NB Stereo Interface Descriptions.

For the Mazda, all we have to do is set pin 6 (AUX CONTROL IN) to +5v. The display on the radio says "LINE" and the aux input is the only audio source.

I saw that Subaru claims pin F (pin 6) is not connected, but someone ought to confirm that. Mazda uses that pin because they had a factory optional add-on cassette player for these stereos that needed a simple trigger. The Mazda radios are also built by Matsushiiita/Panasonic, BTW.

It sounds like the line-in is always on for your stereos, so you might just try using the System Mute pin (pin L).

I have some questions, I own a 02 wrx wagon and I'm in socal, my first question is there a double din dvd player with the screen already that fits my car with no mods? second, if I do install a double din dvd player will I be able to use the oem subwoofer still? and for my last question, can I add an amplifier and a sub in the trunk with the oem sub still working??? thanks in advance.

Yes, you can add an amp and sub with your stock sub still working. Yes, I've seen many people with double din dvd units right in dash. You will still be able to use the stock sub with that as well.

P.S. Better put on your flame suit with that user name

thanks for the heads up

will i be able to power aftermarket door speakers with the stock HU? if so how much wattage can the stock HU support? i don't have enough money for an amp but i want better door speakers.

On this new USA '07 2.5i MT5 Wagon, I intend to replace the head unit with an Alpine 9856 or Pioneer 4800/5800, both of which are available with dedicated subwoofer output and control. I'm hoping that this approach will provide a stereo sub signal condensed safely into a mono output for the single factory OEM sub my car came with. I know bass is generally not panned strongly to the right or left channel, but in rare cases it is.

Does someone have a moment to answer these few questions?

1. Will a speaker-level output be sufficient to run the OEM Subwoofer?
2. Some owners with aftermarket head units that have no dedicated sub outputs just tap off of one of the main speaker outs to run the sub, is that still a sensible alternative?
3. The factory radio seems to tap off a front speaker output. Is that true? Would that be just one, left or right, rather than some combination of both? I think some combination might cause an inappropriate right/left signal cross.
4. One owner tapped off the front left for his subwoofer output. Was that a good choice?

Thank you for your time and expertise. This forum is great and I've already learned a lot from everyone!

Follow-up:
As it turns out, the factory radio powers the OEM sub off of the front speakers - both of them. So there must be an internal signal combiner that permits both the right and left channels to send bass to the sub without it crossing the channels.

have a question where can i find the speed sensor wire ive been searchn all day and got nothing... HELP!

Search is your friend n00blet
http://forums.nasioc.com/forums/sear...archid=5823445

probably not on the back of a factory stereo!!

make & model of your car might help someone answer you.
w/o this info it migh be impossible to answer.

sorry 2006 WRX TR ive found a ton about 05 and older but nothing on 06... ive been searching all day !

doesn't the factory hu have an active eq that decreases bass as volume is increased...this automatically is bad - get a Fosgate 3sixty or something if you keep the factory hu to clean the curve

^^ yes it does

Is it possible to power just the OEM sub driver with an aftermarket amp coming off an aftermarket head unit with sub pre-out and sub control by circumventing the OEM sub amp completely - basically, hand wiring directly to the OEM sub driver?

How do you reset a stock HU in an '04 WRX? My battery was dead for a while and now the HU will not turn on at all no matter what I try.

What dash kit can u use to add an aftermarket head unit? its a 06 WRX TR

Dash Kits are Not Applicable to imprezas.

Anyone?!?

I don't think there is a reset beyond removing power from them.

Does anyone know if the 2006 factory harness will plug directly into a 2007 head unit?

Is there any way to recalibrate the volume control in the 06/07 head unit? On my '02, a comfortable listening level for FM radio was a volume setting between 10 and 15. On my '07, it's closer to 30. Both units have the same 40-step volume scale.

It should

I would like to know the answer to this as well, if someone has the information. Also, the volume maxes out at "40" what's that all about? A good listening level is close to 30 (26-32) typically, and it stops at 40. That doesn't seem right.