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  • Crossover design

  • Ramil

    March 27, 2021 at 1:43 pm

    Hi all. I’m new on the hifi amps and speakers. I started a speakers project. Selected drives. Dayton rs270p-8a woofer, dayton rs125p-8 mid , dayton nd25fa-4 tweeter. Put all zma info and did the process in the passive crossover designer 8 as I learned on a youtube video. I studied the drivers curves and decided to make crossover at 500hz and 3500hz. I’ll add a picture of the graphic that I got. Let me know how it looks to you. Thanks.


  • 123Toid

    April 12, 2021 at 5:03 am


    Since these aren’t real measurements a few things you did not account for.  First is the baffle step loss. Second is the offsets.  You really should be estimating the Z offset, which will give you a better picture of what is going on. But it looks like you are on the right track. 

  • Ramil

    April 12, 2021 at 10:54 am

    @123toid how do I do that? 😁😁

  • 123Toid

    April 13, 2021 at 3:58 am

    Baffle step loss will really depend on the width of your baffle.  Here is a great video by Impulse Audio which talks about what BSC is 

    A helpful site which will help determine your BSC loss is here.


    The Z offset will literally be a guess, but you are trying to figure out the acoustic center of the tweeter in association to the woofer and mid.  This talks about the Zoffset: https://youtu.be/zW5ZjN-gp_Q


    For this, you could try to measure it based off the physical measurements of the driver, just to get an idea of what will work well with each other.  BUt you will eventually want to take your own measurements.

  • Bayilo

    April 27, 2021 at 7:26 pm

    I am trying to upload files so the forum can help with designing a passive crossover, but this forum website will not accept any of the following files: frd, zma, zip, rar, REW data, Xsim


    What type of files are acceptable for submission through this site?

  • Mistersota

    April 27, 2021 at 7:55 pm

    @bayilo You’ll just have to upload jpegs of the graphs and we can use a tracing program to convert them ourselves.

  • 123Toid

    April 28, 2021 at 12:24 am


    Great call!  He can also zip the files and upload them. Even so, I still prefer to see picture of what is going on before downloading a bunch of files.  He did send the files to me and I uploaded them on a new post he created.

  • Donnie

    May 1, 2021 at 12:19 pm


         Here are are few pics and link to my Cedar Speaker build using the Dayton Audio RS100 Driver and your Crossover recommendations from your youtube video. The audio quality is much better than the cell phone video I posted. Will hopefully follow up with some better recordings later.

    youtube link:

    Cedar Desktop Speaker Build – YouTube

    Cedar Speaker Sound Demos:


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