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    aaron9060's Avatar
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    Need help replacing 3x10" MTX Blue Thunder subs

    Hi, I fear my old MTX 10" woofers aren't kicking like they used to, so I want to replace them - but keep the enclosure (which apparently makes a nice scratching post).

    The enclosure is powered by an MTX Thunder 2300 amp with these specs -

    150 Watts x 2 into a 4 Ohm load with less than 0.05% THD+N
    300 Watts x 2 into a 2 Ohm load with less than 0.1% THD+N
    600 Watts bridged into a 4 Ohm load with less than 0.1% THD+N

    Here's a closeup of the writing on the magnet, 12ohm? Really? That sounds high to me.

    And here's how the subs are wired up to the terminal.


    I calculated the enclosure's area to be 1.23 ft^3. But where the hell do i find 3 12-ohm woofers?

    Any suggestions or advice are much appreciated.

    Aaron







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    Re: Need help replacing 3x10" MTX Blue Thunder subs

    OK seems like there are no 12-ohm woofers to replace these with, but, I can get 3x 2-ohm subs wired in parallel to achieve a 6 ohm load. Not the 4 ohm load I was hoping for, but the amp should do fine.




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    Re: Need help replacing 3x10" MTX Blue Thunder subs

    well it would be 5.67 ohm load.



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    Quote Originally Posted by BayAreaBimmer View Post
    And the big three are subs, an amp, and head unit?

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    Re: Need help replacing 3x10" MTX Blue Thunder subs

    When you wire stuff in parallel it brings the impedance down, not up. You're talking about series.

    If I were you, I would look into an amp that is 1 ohm stable so you could wire 3x 4ohm subs down to 1.3 ohms, or downgrade to 2x 2ohm subs. You would be able to do 300 watts to each sub @ 2 ohms.




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    Re: Need help replacing 3x10" MTX Blue Thunder subs

    Quote Originally Posted by Kangaroux View Post
    When you wire stuff in parallel it brings the impedance down, not up. You're talking about series.

    If I were you, I would look into an amp that is 1 ohm stable so you could wire 3x 4ohm subs down to 1.3 ohms, or downgrade to 2x 2ohm subs. You would be able to do 300 watts to each sub @ 2 ohms.
    Yeah i didnt see that he put parallel. I think he should either get a 1 ohm amp or upgrade to 2 15"s. cone area FTMFW!



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    Quote Originally Posted by BayAreaBimmer View Post
    And the big three are subs, an amp, and head unit?

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    aaron9060's Avatar
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    Re: Need help replacing 3x10" MTX Blue Thunder subs

    Right, sorry, I meant series. This wouldn't run my amp any harder but would put out less power, right? Say, 400W instead of 600W? I was hoping to avoid buying a new amp; i love my blue thunders! My cabin speaker amp is also a blue thunder, and they look lovely together.

    * there was a picture here but the forum registration is borked and i can't post pics.




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