e46 head unit RCAs?
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  1. #1
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    e46xi's Avatar
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    Model
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    Engine
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    e46 head unit RCAs?

    Hey guys, i was looking to install subwoofers in my 03' 325. I'm new to the whole audio scene honestly and i was wondering if the stock head unit has a place to plug in RCA cables.
    Or how i would go about installing RCA cables to my vehicle.
    Also, i understand this is a very noobish question, but i was planning on buying a subwoofer kit that came with an amp. Should i run the new amp in parrellel with the oem one or am i supposed to pull out my old amp and use this new one.
    >.< I'm sorry if i sound like an idiot, if anyone knows any good threads on how to install subwoofers just give me the link. Thank you

  2. #2
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    DaveE46's Avatar
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    Found this for you if it any help,

    This is a write-up on installing subwoofers and an amplifier in an E46. PLEASE NOTE: There are countless different methods and setups. So this is just a general guide for the first timer DIY'er. I installed 2 12" 400RMS Kenwoods and used a 1000W 2-Channel Amp. I will write out exactly what I installed and how I did it, even though I'm sure there are much better ways.

    You will need:
    -Your choice of Subs and an Amp
    -A Speaker line to RCA line out converter
    -An Amp Wiring Kit
    -A sub enclosure of your choice

    Depending on how you purchase the subs and enclosure you may have to assemble the two, but that is quite self explanatory and you should be able to figure it out. So for the purposes of this guide I will assume you have your subs properly mounted in an enclosure. You will also have to decide where you want to mount your amp, some put it on the back of the rear seats, I chose to mount mine on the top of the enclosure.

    Step one:
    Take your line out converter out, and give it a looksy, it will probably have female connections on the speaker wire end, you will need to cut these off and twist the two negative wires together and two positive wires together, cap them off with a t-connector. Now get into the trunk and lie on your back looking up where the 6x9's are (you may have to tear out a little section of carpet to see it). Fish around for the two wires that go to said speaker, on the left speaker the colors are dark brown, and light brown, believe it or not. Crimp the other part of the t-connections onto these wires, then connect your RCA converter. Plug your RCA cable into the other end. I guessed that light brown was positive and dark brown was negative and it sounds fine.

    Step two:
    Now its time for the fun part, wiring the battery. Your positive battery cable will run from the connection next to the positive terminal on the battery, through a little fuse breaker thing, and to the positive connection on the Amp. Most of this is really self explanatory, but here are a few pointers. Disconnect the negative connection on the battery while you are messing around in there avoid personal injury. After you set up your positive cable, LEAVE THE FUSE OUT OF IT. REPEAT, LEAVE THE FUSE OUT, installing that little 80A fuse is the last step of the process. The ground cable can connect right at the same place the battery grounds, and then run to the negative connection at the back of the amp. After you connect both battery cables and have them run, you are ready for

    Step three:
    Connect the positive cable to the amp, then the negative cable. Wire the speakers into the amp, and connect the RCA wires into the "line in" jacks. Situate your enclosure how you want, I'd pick up some velcro or something that will keep it from moving around in the trunk. Once everything is in place and connected you are allowed to go back over to the battery compartment and stick in that little fuse now that you won't be swinging those wires around. If nothing sparks or explodes, you can go turn the car on and make sure everything works.

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    e46xi (08-08-2012)

  4. #3
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    So wait, does that mean there is a speaker on the roof of the trunk under the carpet/speaker wire running through the roof of the trunk? (reffering to step one of course) =] thanks for the help in advance btw

  5. #4
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    Yes there is a speaker either side in the parcel shelf so the speaker wires will run under there for you to tap into.

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