2015 WRX Full Audio System Set-Up Questions
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This is a discussion on 2015 WRX Full Audio System Set-Up Questions within the Electronics/Car Audio forums, part of the Interior Mods category; Hello All! Ordered a 2015 WRX Premium on 3/31 didn't want to pay extra for H/K upgrade ... So here ...

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    2015 WRX Full Audio System Set-Up Questions

    Hello All!

    Ordered a 2015 WRX Premium on 3/31 didn't want to pay extra for H/K upgrade ... So here is my plans... and I have questions! Thanks!

    Hooking up to the Stock 2015 WRX HU... forgive me if some are basic, this is my first full system... just replaced speakers and added a sub before.

    Alpine SPR-60C 6.5" Car Audio Component System (Pair) (For 2 Front Speakers and 2 Tweeters)
    110watts RMS

    Alpine SPR-60 6-1/2" Coaxial 2-Way Type-R Speaker Set (For 2 Rear Speakers)
    100watt RMS

    Rockford Fosgate P300-12 Punch 300 Watt (Powered) Loaded 10-Inch
    Subwoofer Enclosure (For Trunk)

    Alpine MRX-F65 4-channel Car Amplifier
    110watts RMS x4

    Here are my questions:
    - (General Car Audio Question) Is running a system like this bad for the car? Battery and Alternator - Would they likely have less of a lifespan? Are there any other parts affected that would possibly fail sooner if I didn't have a system? Should I get a capacitor for the Sub & Amp?

    - Will the speakers fit? They are 6 3/4 inches but they say they'll fit in a 6.5 inch space...? does anyone know the mounting depth and such...?

    - Is there a Harness out there so I don't have to F*** up the factory harness if I want to go back to it? (I think I need to cut the speaker wires to run them to the amp if not...? correct?)

    - For people who don't have the H/K system are the rear speakers on the deck? or are they in the rear doors??

    - Do I absolutely need to run new wire to the speakers? Or is the stock wiring thick enough? What will happen if I am lazy and don't? Should I run 16 or 14 gauge for this system?

    - (noob question) will the components in the front be less powerful because there are 2 speakers and 2 tweeters running off two channels? vs just 2 speakers?


    What else is needed other than the speakers, sub and amp?
    - Spacers for speakers, where to get? (Cheapest that are good)
    - 16 Gauge Wire for new speakers (What type of connectors?) (What type of wire can I get that will turn a Left and Right Front to 2 left and right fronts for the components???)
    - Plastic Pull Panel Remover Thing
    - Amp wiring kit and Sub wiring Kit
    - Crossovers for the back 2 Speakers (Non-Component) (Are these Needed??)
    - Amp has speaker level input so I don't need 2 Channel Line out converters correct? Just run the wires from the HU to the AMP?
    - Harness so I don't have to F*** up the factory harness if I want to go back to it?


    What is the best way to hook all this up?
    Speaker Install:
    1) Install Amp under passenger seat and connect battery, ground and remote.
    2) Install the speakers and components using spacers and run new wiring (16 gauge) from them to the amp (speaker output) under the passenger seat.
    3) Run the speaker wires from the head unit to the speaker level input on the amp.
    Possible Problems:
    - Running new wires to the doors will be hell most likely? Suggestions?
    - Running battery wire to battery to firewall will be fun

    Subwoofer Install:
    1) Put it in the trunk and connect the ground wire. Run the battery wire to the battery. Connect the remote wire as well.
    2) Where should I hook the sub woofer speaker wires to? Since it is already amped I don't want to connect to the rear speaker wire as that will be amped already. Should I connect to the rear speaker wire coming out of the head unit? What do people normally do?

    - (another noob question) will pulling the audio signal from the rear speaker wire before it gets to the amp degrade any parts of the sound? sub or speakers??

    THANKS ALOT... I AM SURE THIS WILL HELP OTHERS WITH QUESTIONS AS WELL!

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    For other DIY'ers doing their own stereos:
    Here are some links to Subaru install instructions for the (KICKER) speakers, tweeters and subs. Will be great to know where the clips and screws are even if you’re not buying and using the Kicker products!!

    http://techinfo.subaru.com/proxy/724...zaSpeakers.pdf

    http://techinfo.subaru.com/proxy/638...H630SFG400.pdf

    http://techinfo.subaru.com/proxy/724...zaTweeters.pdf

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    How are you hooking up the amp? The stock radio doesn't have preouts (unless I'm mistaken?)

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    Quote Originally Posted by CMoranRVA View Post
    How are you hooking up the amp? The stock radio doesn't have preouts (unless I'm mistaken?)
    The sub I am getting has speaker level input! so no RCA's needed!

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    Registered User cflip2x's Avatar
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    Why dont you change the HU first? and see how the stock speakers are

    But if you are going to go the speakers swap I dont think you need corssovers for the rear speakers since they aren't component. I think you should be fine using the oem wiring unless you plan on going to audio competitions. Maybe find out what adapters to get it would make the install easier
    Last edited by cflip2x; 04-25-2014 at 05:23 PM.
    2012 WRB 4DR | SPT Exhaust | Short Throw | Rally Armour | WC Lathe Werks Custom TI Knob | Kartboy Bushings | Stoptech Brake Lines | JBK Elements DRL | STI HID Retrofit | XB LED Angel Eyes | GrimmSpeed Lightweight Crank Pulley

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    So the tweeters are pre-wired just missing if you don't buy that option? I have a 2015 WRX base.

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    Registered User jbed1203's Avatar
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    Quote Originally Posted by mknewman View Post
    So the tweeters are pre-wired just missing if you don't buy that option? I have a 2015 WRX base.
    Are you saying they're pre-wired or are you asking if they're pre-wired?
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    Yes, I have a Base 2015 and did not buy the tweeters. I've bought a pair but from what I'm seeing the wiring is just there under the grill and only needs to be plugged in. Can you verify that?

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    Quote Originally Posted by mknewman View Post
    Yes, I have a Base 2015 and did not buy the tweeters. I've bought a pair but from what I'm seeing the wiring is just there under the grill and only needs to be plugged in. Can you verify that?
    I'm picking up my base 15 tonight actually! I plan on putting in a new HU sometime this week, so maybe i'll take a peek. If you already have the car, why don't you just run out and look?
    “Fermentation may have been a greater discovery than fire.” - David Rains Wallace

    2015 WRX - Crystal White Pearl
    2014 Forester 2.5i Premium - Dark Grey Metallic

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    You were right, I went out last night and through the grill on the dash I could see what appears to be the tweeters. I turned the stereo way up and could hear them also. I've never had a stock radio this bad. I read about it before I bought the car and figured it couldn't possibly be as bad as people were saying. I've applied all the secret incantations to it also, Loud On, Through Mode, etc.

    I'm just curious, I did not buy the tweeter option when I bought the car, but have tweeters, so is the option upgraded tweeters (Kicker) or just a scam to get you to pay for something that's already there?
    Last edited by mknewman; 10-22-2014 at 08:54 AM.

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    Registered User jbed1203's Avatar
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    I'll check mine out tonight. I picked it up last night and the radio is just awful. Luckily, I have an aftermarket nav/hu just waiting for me to put er in.

    In regards to the tweeter, my guess would be it's for the upgraded speakers. It says "6 speaker..." on the subaru site. So my guess would be front door, back door, tweeters.
    “Fermentation may have been a greater discovery than fire.” - David Rains Wallace

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    Quote Originally Posted by mknewman View Post
    You were right, I went out last night and through the grill on the dash I could see what appears to be the tweeters. I turned the stereo way up and could hear them also. I've never had a stock radio this bad. I read about it before I bought the car and figured it couldn't possibly be as bad as people were saying. I've applied all the secret incantations to it also, Loud On, Through Mode, etc.

    I'm just curious, I did not buy the tweeter option when I bought the car, but have tweeters, so is the option upgraded tweeters (Kicker) or just a scam to get you to pay for something that's already there?
    I figured it out. When you buy the upgraded speakers you only get 4, Kicker speakers. The tweeter kit is an upgrade that you would need to purchase in addition to the speakers. The tweeters are also made by Kicker. Why they didn't combine the two I'll never know. So yes, we have them and yes, it's another way for them to make money!
    “Fermentation may have been a greater discovery than fire.” - David Rains Wallace

    2015 WRX - Crystal White Pearl
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    Doesn't that seem a bit fishy? Are they actually charging for nothing? Are the upgraded speakers the same ones in the car now? Maybe that would explain people who claim upgrading doesn't do much.

    I've tweaked mine using the magic menu and adding a lot of treble a a little midrange (+4,+2) and it sounds better, but still like it's behind a curtain. I'm really not into adding a woofer box in the trunk, but a 12" in the rear shelf is possible. I'm really more of a talk radio and Rock guy though so not into big bass.

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    Registered User jbed1203's Avatar
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    No, they are upgraded speakers. My guess would be the stock speakers are basic, Subaru OEM paper coned speakers. The upgraded speakers probably are much better.

    You're best bet is to change out the HU. I changed it out in my forester and it sounds much better. I'm actually changing out the HU in my WRX tonight (less than 24 hours old haha). I'll let you know if I get the same result.
    “Fermentation may have been a greater discovery than fire.” - David Rains Wallace

    2015 WRX - Crystal White Pearl
    2014 Forester 2.5i Premium - Dark Grey Metallic

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    Jbed1203 how did it go?

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