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Thread: Custom 3 way speaker

  1. #1

    Custom 3 way speaker

    I am making a custom 3-way front speaker. The question is what do you suggest my crossover points should be and what type of crossover should I use.
    All 3 speakers are 4 ohms.
    The Tweeter is a ribbon tweeter with a RMS is 25 watts and Usable Frequency Range 1900-18kHz
    The midrange woofer has a RMS of 300 watts and Usable Frequency Range 95-9.5kHz
    The sub woofer has a RMS of 200 watts and Usable Frequency Range 10-400 hz
    I am powering it with a 575watt @ 4ohms per channel. So I need a crossover that can handle that much watts.

    What are you suggestions on the crossover, I am thinking I might need to make one.
    Last edited by brad2525; 10-30-2016 at 08:03 PM. Reason: More Info

  2. #2
    VIP/Donor [VIP/Donor] Folsom's Avatar
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    It's a bit more complicated than that. You have to deal with sensitivities of the drivers and baffle compensation.

    Given that info 300hz and 3000hz might be somewhat ideal, possibly, if all else is accounted for.

  3. #3
    Member Sponsor [VIP/Donor] GaryProtein's Avatar
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    Quote Originally Posted by brad2525 View Post
    I am making a custom 3-way front speaker. The question is what do you suggest my crossover points should be and what type of crossover should I use.
    All 3 speakers are 4 ohms.
    The Tweeter is a ribbon tweeter with a RMS is 25 watts and Usable Frequency Range 1900-18kHz
    The midrange woofer has a RMS of 300 watts and Usable Frequency Range 95-9.5kHz
    The sub woofer has a RMS of 200 watts and Usable Frequency Range 10-400 hz
    I am powering it with a 575watt @ 4ohms per channel. So I need a crossover that can handle that much watts.

    What are you suggestions on the crossover, I am thinking I might need to make one.
    Have you ever built a crossover before or any other device?

    If you have made crossovers before, why not make a 3 way ACTIVE crossover and get four more channels of amplification? That would give you adjustability in the frequency of the crossover points, their slopes as well as the volumes to each of the amplifiers which would take differing driver sensitivities into account.
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  4. #4
    I am thinking i didn't give all the information so here is more
    The cavity of the speaker is limited to about 6" deep, 15" wide and anywhere from 40 to 60" tall. These dimensions are because i want it mounted into the wall. So the woofer is 8" and is the CDT-800CF. I was going to do a sealed enclosure because from what i understand the woofer hits 0 db around 200hz if it is not ported. I am not sure what to do about the midrange which is a DS18 PRO-NEO8 8" which i hooked up in a temp system and sound good but I am thinking it is not as high quality as i wanted so i might switch them out. The tweeter is the Dayton Audio AMT3-4 Air Motion Transformer Tweeter 4 Ohm, i know it is not the best tweeter and the AMTPro-4 is better but money is not unlimited. So right now i have already into it $600 dollars for the speakers and 300 for the amp. I still need to build the crossover and speaker box.

    So I would like as high fidelity as possible on my budget.

    Does this help? Do you have suggestions for a better Midrange woofer?


    Active crossover would be a lot mroe from my research. If i went cheap on the active crossover then it was give a lot more distoration to my speakers. I have a crown amp which allows me to use it as a active crossover but i would have to buy 2 of them which would increase my cost another 300 dollars plus i would still need to limit the high of the mid range and have a inline crossover for the tweeter. So that is why i why I thought a passive crossover would be best.

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