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    Icon9 Subwoofer and Amplifier Help!

    Story time, I had two MTX Audio 10" subwoofers rated at 200RMS each.
    The link to the whole setup is here: bitly/LL4PnH (Put a . between "bit" and "ly")

    They sounded great, they had a lot of "boom" versus just straight up shaking which I've seen in setups before. Don't get me wrong, these subwoofers shook my whole truck, but it wasn't like massage chairs, and instead was like "booming" bass.

    In my case and I would assume everyones: Boom > Straight up vibration

    None the less, I blew one of the subwoofers, as the "voice coil had come unwound", as MTX Audio had told me, so I ended up purchasing two Kicker CVX 10" subwoofers rated at 600RMS each. I replaced the MTX ones with these and used the SAME amplifier. Now the specifications on the amp are listed in the link I posted, but it still confuses me to this day. On the bottom of my two MTX subwoofers was written "0.7 Ohm", which I thought was funny because it was supposed to be 4 Ohms per subwoofer.

    Video of blown subwoofer: bitly/Mzdaj7 (Put a . between "bit" and "ly")

    Anyways, underpowering these Kicker subwoofers sounded just like my MTX Audio ones, seeing as they were running at 400RMS just like before due to the same amp. The only reason I got these ones is because of the Dual Voice Coil and the fact that they are "Competition" subwoofers. Surely they will last longer.

    Which brings me down to my final point. I recently purchased this amplifier: amznto/PbHO2C (Put a . between "amzn" and "to")

    Now I had thought I'd be able to wire to 1 Ohm, but I was wrong and am stuck at 2 Ohms. Oh well. Still 900 watts which is more than double what I had previously. Anywho, with these Kicker CVXs hooked up to this amp, I feel as if the car has equal if not less "boom", and more shaking. I honestly think it doesn't sound like ~900 watts.

    I guess this is the time to tell you that when I tested the subwoofers while they were in the box and not hooked up, they came up to around 1.5 Ohms. I was told this was okay and figured I'd be at around 1000RMS which I was O.K. with.

    Back the point, I feel like something is wrong. The Kicker CVXs get hot to the touch on the metal part surrounding the speaker, and really warm right in the middle of the dustcap. But they are competition subwoofers and aren't even at a full 600RMS each, so why the temperatures?

    Sometimes when I listen closer to the subwoofer, I can hear what seems to be the subwoofer pushing harder than making bass. As if it's working harder and not producing. I'm really nervous as I do not want to clip these subwoofers and break them, because they aren't cheap.

    Another huge concern to me is this new amp. With my old MTX Audio subwoofers, my rear view mirror would shake like crazy on songs, and the side mirrors would shake mildly, only a lot on the longer frequency songs.

    Here's an example of my shaking and what not: bitly/LUSKeG (Put a . between "bit" and "ly")

    Now I'm no expert, but I expected my new setup to be the exact same as before, just double everything. It seems now like everything is messed up and to be honest I'm very disappointed and don't know what to do. I'm on here looking for help from anyone.

    Some reassurance on the temperatures and what not would make me feel better if it's normal.

    That's it....for now.

    EDIT: Well it seems since I am new I cannot post any URLS, so I'll try put them in comments below.
    EDIT: Sorry about the links thing, I am new and am not allowed to post any, so I've managed to kind of include them.
    EDIT: My lights dim when the bass hits now and I can't believe why seeing as it doesn't sound like ~1000RMS, anyway to measure how many watts I actually have to the decimal?







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    Re: Subwoofer and Amplifier Help!

    What size power and ground are you running? Where is your ground wire connected to? What deck are you using? Where is you gain set to? What is your low pass set to? Can you take a good picture of the settings and post it up here?




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    Re: Subwoofer and Amplifier Help!

    Quote Originally Posted by jasonAz View Post
    What size power and ground are you running? Where is your ground wire connected to? What deck are you using? Where is you gain set to? What is your low pass set to? Can you take a good picture of the settings and post it up here?
    The kit I bought is: amznto/NDB1Zr (Put a . between "amzn" and "to")

    Everything is 4 guage and the ground is the same ground that my previous kit was grounded to with the MTX Audio subwoofers.

    My deck is: amznto/PkgqAE (Put a . between "amzn" and "to")

    I could take a picture of all my settings, but as my music was playing I tried adjusting each one and could get it nowhere to what I had before "boom" wise.




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    Re: Subwoofer and Amplifier Help!

    In Kicker land, Competition is just the brand model name, no more, no less..just a Marketing ploy that worked on you and many other peeps. As far as 2 ohms, that is desirable, most ppl run who run 1 ohm do so simply due to the costs involved to get the same power at a more efficient 4ohms, therefore sacrificing sq and efficiency for cheaper power output, yet it requires more money spent on electrical upgrades, etc..anyway,

    Did you double check your sub wiring to make sure they are in phase with each other? Maybe the Kickers require a completely different box design? Obviously the difference is in the subs if they are presenting the same load to the same amplifier....perhaps these possibilities are causing you to drive the amp to clipping to compensate?




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    Re: Subwoofer and Amplifier Help!

    Quote Originally Posted by quackhead View Post
    In Kicker land, Competition is just the brand model name, no more, no less..just a Marketing ploy that worked on you and many other peeps. As far as 2 ohms, that is desirable, most ppl run who run 1 ohm do so simply due to the costs involved to get the same power at a more efficient 4ohms, therefore sacrificing sq and efficiency for cheaper power output, yet it requires more money spent on electrical upgrades, etc..anyway,

    Did you double check your sub wiring to make sure they are in phase with each other? Maybe the Kickers require a completely different box design? Obviously the difference is in the subs if they are presenting the same load to the same amplifier....perhaps these possibilities are causing you to drive the amp to clipping to compensate?
    The Kickers are in the same box as I linked with the MTX ones. They also sounded Identical to the MTX Audio subwoofers when I had them using the MTX amp. Now that I've changed the amp everything is different. If the subs weren't in phase they would sound "off" right? The bass is on key....to the most part.

    MTX Audio: Lots of boom and kick

    Kickers: Lots of boom and kick

    Kickers w/ new amp: Less boom and huge huge kick




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    Re: Subwoofer and Amplifier Help!

    Quote Originally Posted by xxbobbyfinxx View Post
    The Kickers are in the same box as I linked with the MTX ones. They also sounded Identical to the MTX Audio subwoofers when I had them using the MTX amp. Now that I've changed the amp everything is different. If the subs weren't in phase they would sound "off" right? The bass is on key....to the most part.

    MTX Audio: Lots of boom and kick

    Kickers: Lots of boom and kick

    Kickers w/ new amp: Less boom and huge huge kick
    just glancing at the specs, you need twice as much box ported and about 3 x as much box sealed for the Kickers...which are they, The Kicker 10CVX102 or the Kicker 10CVX104's?




    "Bailout: Taking a trillion dollars from the people and giving it to the banks so the banks can loan it back to the people, at interest!"

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    Re: Subwoofer and Amplifier Help!

    so, underpowering them in the same box as the MTX, they sounded similar...Do you use the 45hz bass boost on the BRZ as compared to the MTX amp?




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    Re: Subwoofer and Amplifier Help!

    Quote Originally Posted by xxbobbyfinxx View Post
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    Re: Subwoofer and Amplifier Help!

    Quote Originally Posted by quackhead View Post
    just glancing at the specs, you need twice as much box ported and about 3 x as much box sealed for the Kickers...which are they, The Kicker 10CVX102 or the Kicker 10CVX104's?
    The box that came with the MTX subwoofers is 1.8 cubic feet.

    The Kicker CVX 10"s have a minimum of .8 cubic feet each, meaning 1.6 cubic feet for both.

    The box is fine for them.

    They are the DVC 2 Ohm version, and are wired parallel to get 2 Ohms, which is actually ~1.5 which is weird but oh well I don't know how to explain that.




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    Re: Subwoofer and Amplifier Help!

    u got both coils wired parallel on each sub and both subs parallel, that is a 1 ohm load.
    I know KIcker recommends a minimum of .8 per sub, but the outside of that is 3 per sub..so sealed, say 6 cubes if you were underpowering them and 2 cubes if you are overpowering them. even at 1 ohm, you will not come close to overpowering them with that amp if you keep a clean signal.




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    Re: Subwoofer and Amplifier Help!

    Quote Originally Posted by quackhead View Post
    u got both coils wired parallel on each sub and both subs parallel, that is a 1 ohm load.
    I know KIcker recommends a minimum of .8 per sub, but the outside of that is 3 per sub..so sealed, say 6 cubes if you were underpowering them and 2 cubes if you are overpowering them. even at 1 ohm, you will not come close to overpowering them with that amp if you keep a clean signal.
    Ah, but I have two subwoofers, each having 2 voice coils, with 2 Ohms per voice coil.....

    So all together it comes out to 2 Ohms.

    As for the volume, I'm just going to be using the minimum because I can't fit much in a single cab truck. Plus the subwoofers aren't exactly shallow and are already tough to fit in there.




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    Re: Subwoofer and Amplifier Help!

    Quote Originally Posted by Flex68 View Post
    Cool. Give me my little sleeping mat to lie on, and it'll be just like Kindergarten
    hell no, u tell the story and let me take a nap




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    Re: Subwoofer and Amplifier Help!

    Quote Originally Posted by xxbobbyfinxx View Post
    Ah, but I have two subwoofers, each having 2 voice coils, with 2 Ohms per voice coil.....

    So all together it comes out to 2 Ohms.

    As for the volume, I'm just going to be using the minimum because I can't fit much in a single cab truck. Plus the subwoofers aren't exactly shallow and are already tough to fit in there.
    my bad, so what you are saying is you have them series/parallel wired to 2 ohms, correct?....with the room available, you would probably be better off with a quality 10 ported on 1200 watts.




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    Re: Subwoofer and Amplifier Help!

    Quote Originally Posted by quackhead View Post
    my bad, so what you are saying is you have them series/parallel wired to 2 ohms, correct?....with the room available, you would probably be better off with a quality 10 ported on 1200 watts.
    I really cannot emphasize enough how little room there is in a Single Cab truck. The sealed box I have now is perfect because it is molded to my truck. There's just no room for a ported box in my truck.




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    Re: Subwoofer and Amplifier Help!

    I would suggest buying a matching MTX 10 to the one you have, or going with 2 DVC 4 ohms wired to 4ohms on that amp. Just because Kicker says they will work in .8 cubes does not mean they will sound very good with any decent power, I have never heard one sound good sealed at all. you start throwing power to them in that small a space sealed, and you might burn a coil from too much compression, even worse if you clip them trying to get more volume.....or too big a box with too much power will make them exceed xmax and bottom themselves.
    Last edited by quackhead; 07-05-2012 at 04:31 PM. Reason: DVC




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