Ok.... I did a little search and now have questions. My Co-worker has a tc with the stock HU. He wants to install a amp and one 10" to the stock HU. I told him I would help him out since ive wired a few HU/amp/subs. But ive never atempted to do so on a stock HU. I read that you need a line out coverter..? That coverts to RCA.. makin sure? Where does it wire to on the HU. Also I heard somthing about tapping into the rear speakers? Not sure how to do it. I though the rca converter was the way. Again my buddy wants to wire one 10" and an amp into his stock headunit. Someone please clear somethings up for me. Thanks in advance. Danny.

 

Yup. RCA converter is the way. I think you have everything in mind and just need confirmation.

RCA conventer input wires are connected with the front or rear speaker output from the HU. Then just connect an RCA cable to its output.

 

front or rear? both? whats the difference? also what do I do about the amps remote turn on wire...?

 

So here's something that I'd like to know as well...

What difference would there be to using the converter over using just the line level inputs of the speaker wires? I mean, if you're converting the same signal to RCAs... are you really changing anything? I'm really asking... I don't know.

Would it be mainly for amps without the speaker level inputs or what?

 

Yes I believe its only for amps with rca inputs. Now... back on topic. In the sticky it says theres a blue/white wire behind the HU for the remote turn-on...? The coverter only converts the front or rear to RCA depending on which I wire it to...? Does this mean im not going to be able to use the rear speakers or do I just splice it right to it? Sorry if I sound a bit confused.

 

Just choose one. I wouldn't recommend both. IDK, it's just me.

I'm not sure about the difference. I guess it just differs because of the fader settings. I think they're just the same. I might be wrong, so anyone feel free to correct me.

And about the amp's remote wire, connect it to the ACC wire of the stock HU because as far as my stock HU is concerned, there's no remote wire.

 

If you're just adding an amp for a sub, just tap it to either the front or the rear. Don't cut the wires because you'll lose connection to the stock speakers.

My suggestion is, tap it with the rear speaker wires so that when you set the fader settings, the subs go with the rear stock speakers. I think it'll be odd if you'll tap it with the front and when you adjust it, the stock front speakers go together with the subs. IDK, it's all about personal preference.

And in my stock HU, I didn't find a blue/white wire. I think that's for aftermarket HU's.

 

it tap splice it off the rear speaker wires so that it wont affect your main speakers (the ones in the front).

i always prefer using the line inputs on the amp because if you upgrade your deck, the RCAs are already ran and its a simple plug in when you upgrade. even if not upgrading, id still run RCAs out of personal preferences (not all amps have speaker inputs, but all the car amps ive seen have RCA inputs).

and yeah i think i tapped into the ACC wire (if i remember it was the grey one.. im not too sure) for my remote since it would only be on when my car was on.

as for tapping the rear speakers, it just shares some of the signal, thats why i say tap into the rear speakers. you will still get signal out of the rear speakers if you tap it for the RCAs.

 

I'm not used to using speaker-level inputs and not really comfortable using them. I always use low preout voltages then feeding them to an amp.

 

sounds good! so one last time to make thing straight. I tap/splice the rca converters wires to the rear speakers, run the pwr/grd, then hook up rca to the amp, hook the remote wire to the acc, and wire the subs. Done.

ps. what converters did you guys use? anything at walmart, best buy, circuit city, radio shack? Also... can you ajust the low/hi pass fq? and like 40hz-120hz or amI getting over my head?

 

for the filters, depending on which line out you use you can or not. but most of the time you have to use the one on the amp itself. you can actually tap splice the wires for the rear speakers behind the headunit, then run the RCAs (from the line out converter) from behind the headunit through the car to the amp in the trunk; imo thatll be your best bet.

 

^^ yea..im not gonna do a half a$$ job. I want to make it stock looking and clean.

 

mabey I can tap it in the back and find another source to feed the remote wire on... and never touch the HU?

 

Ya you could, if you have a power antenna. Then tap not cut the antenna wire and run it to your remote. This will only work if you antenna stays up while the stereo is on but if it goes down when you play a cd then it wont work. If its not a powered antenna then it also wont work

City-Soundz.com

 

id still say do the wires behind the headunit. RCAs are ALOT easier to run than having to type splice 2 things that are about 4 ft apart (the rear speakers), thats why your better off tapping it behind the headunit.

if you want to make it look clean, i installed a GWS45 rocker switch for a sub kill. its come in handy once and a while, wheni dont wanna bump and what not.

either way you have to touch the HU

 

TAKE A LOOK AT autosound2000 hi low converter. dave navone designed it with richard clark. if you are an oldschool reader 89-94 of autosound and security you will know all about these guys. they build components from scratch. check em out here http://www.autosound2000.com/ and you can also buy what you need

 

ok.... ima do it from behind the HU... Which colors are the speaker wires for the front and rear? also which color wire is the one for the remote turn-on... gray? Thanks again.

 

http://home.cfl.rr.com/icdedppl/faq.html#c12

 

much love scion peeps. few years to come after my ld9 build in process.

 

ok... after searching for the rear speaker wires and the gray ACC/remote wire for a while... Found the ACC/remote by plugging in only one harness at a time to the radio to find power. Then I connected it to the only gray wire on that plug and walla. The speakers wires behind the HU I tryed finding but gave up lol. So I ran speaker wire from the back speakers to the converter behind the HU. Hook it all up and walla again. Works great. His setup is one MTX 10" t4510-04 with an older power acoustic speare 400W 2 channel bridged for max output. First I turned the tre/bass on the HU where I liked it. Then set the amps gains ect....Sound is perfect for someone just wanting a little more quality listening...