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Thread: Can I run this amp with this sub, how do ohms work, help/recommendations...

  1. #11
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    Quote Originally Posted by spuzzdawg View Post
    I haven't answered any of your other questions because I found your post a little hard to follow. Draw up some pictures in pait of the way everything was/is connected and how they relate to your questions

    Spuzzdawg
    spuzz,

    here you go man. sorry its primitive. I had a hard time following the diagrams on our amplifiers wiki about series and parellel.

    How is this sub wired? This is how that audiobahn was wired when I got it second hand.

    Assuming that its a 4 ohm rated sub. What does that do? Lower or higher the ohm impedance?

    thanks!
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  2. #12
    FLAC XC-C30's Avatar
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    that way the sub"ll play at 8Ohm


    You need to wire it this way to play @ 2Ohm :
    Xenia & Isabelle, totally in love!

    'T SQiekenkot: VOLVO 740GL 2.3

    CarPC: none at the moment
    CLARION HX-D2
    CLARION APA4300HX => Fountek NeoCd1.0 + TB W4-1337SD
    CLARION APA4300HX => CSS Trio8
    CLARION APA2100 => Dayton IB385-8

  3. #13
    Newbie TheQuinsta's Avatar
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    Dude

    No way in hell you can run that sub off that amp, common problem with boys and their toys is they look at the max power and go WOW Your RMS is the key your sub (from the page you posted up) says that it is 500W RMS if you amp is output power (100W @14.4 ) this is basically your RMS value you are running your sub way under at least half of what it should be. Ideally you should run a speaker over its rating by a small percent of its total so that your amp doesnt work as hard.

    Normally you would connect up DVC (dual voice coils) subs in parallel that is what they were designed for basic SPL for the big boys doing sound offs, alternativly you would place two single speakers in parallel to achieve this as long as the amp is rated to go into 2 ohms, the amp doesnt have switches to change this its just how the amp works..

    Resistances in parallel effectivly halve ie 4 ohm spk in parallel with another gives you two speakers at 2 ohms this allows you to split the power over both speakers without ****ting you amp and gives you "twice the sound".
    As IC-C30 pic shows this is correct the coils are 4 ohm coils so if you parallel the coils up like the picture you effectivly get one speaker at 2 ohms.


    In short get a bigger amp, if you are running a single 15 and thats it probably go for a single channel amp 2 ohm supporting and dont forget

  4. #14
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    Quote Originally Posted by IC-C30 View Post
    that way the sub"ll play at 8Ohm


    You need to wire it this way to play @ 2Ohm :
    is that series or parellel?

  5. #15
    Newbie TheQuinsta's Avatar
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    Thats parallel, series would as you had it wired in your previous pic that you had drawn amp to red, loop black to red, black to amp

  6. #16
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    thanks quinsta, i know this is all newbie stuff, but its confusing until you get it down...

    appreciate it

  7. #17
    Newbie TheQuinsta's Avatar
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    No worries i started out like you blew up a head unit cause i trusted the existing earth, shat an amp cause of a **** connection, been there done that all my experience is thru my own sorting stuff out reading forums and web pages and the helpful use a audio specialist in town who is a mate of mine been in the business for years.

    And hopefully if people find faults in my posts they can set me straight if they dissagree

  8. #18
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    OHH!!!

    how did you blow up that HU exactly? my buddy blew up one and he was trying to power 500 watt subs with the bazooka i'm using now... i don't think i'm in any danger as I do a lot of fusing. But I'm curious

    ~mikeym

  9. #19
    FLAC XC-C30's Avatar
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    fusing is one thing. If you underpower your sub you will make the amp clip. no fuse will help you there.
    Xenia & Isabelle, totally in love!

    'T SQiekenkot: VOLVO 740GL 2.3

    CarPC: none at the moment
    CLARION HX-D2
    CLARION APA4300HX => Fountek NeoCd1.0 + TB W4-1337SD
    CLARION APA4300HX => CSS Trio8
    CLARION APA2100 => Dayton IB385-8

  10. #20
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    might want to check the wiki again, I worked on it some more...but I noticed that no one else had touched it...
    Jan Bennett
    FS: VW MKIV Bezel for 8" Lilliput - 95% Finished

    Please post on the forums! Chances are, someone else has or will have the same questions as you!

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