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The Hypothetical's

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  • #16
    Originally posted by Bholt View Post
    Ok first off, hello everyone. I have decided to join the forums in the hopes of taking in all the knowledge i can. I am currently working on a possible design, and i would love to have peoples thoughts and opinions about it. This is the reason i have decided to call them the hypothetical's, because as of right now. It is just a design i am considering, until i have to means to put it all together. my current idea is to put these two drivers together, in a sealed box.

    The tweeter: Vifa BC25SC06-04 https://www.parts-express.com/peerle...eter--264-1028 (I already have two of these.)
    The woofer: HiVi F5 https://www.parts-express.com/hivi-f...range--297-435 (I do not own these)

    My current thoughts are a 3000Hz XO, and based off my image included. I did use online calculators (yes i know, not ideal). Any help with the crossover would be absolutely appreciated. And if you can tell me why something is wrong, i will happily love to know why. The driver choices were based on, i already had the tweeters and the woofer (admittedly based on another build of the same materials and smaller) should sound good. But hey, this is my first serious poke at it.
    I have the bc25 tweeters, and this woofer which is on sale at the moment. https://www.parts-express.com/peerle...ofer--264-1090


    I
    've been looking for a reason to do a x-over for this combo. I can help, or bail you out if needed. I think it would make a pretty good speaker. The 874 is very flexible as far as x-over frequency. I've got good results crossing anywhere from 1.5k to 4k.

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    • #17
      Originally posted by Bholt View Post


      Wogg, i went through your page and it seems as though SPL Copy is no longer available. I did try playing with SPL Trace but that did not go so well. Is there any other place i might be able to find it. Googling didn't really net me anything here.
      ​I had heard about that, need to update the page a bit. I do have the file so I think I'll host it to keep the content valid, with the caveat that it's now completely unsupported. The other options above a good too, I've heard they're better but haven't tried myself.
      Originally posted by Wolf View Post
      Try fprawn's tracer:
      Originally posted by Wolf View Post
      It rocks!
      Wolf
      PS- I think we're more geeky than nerdy here... Nope- not same thing...
      ​LOL, I always used them interchangeably. And for the record, I'm perfectly comfortable labeling myself as a big ol' speaker nerd. I'm equally fine with geek though
      Electronics engineer, woofer enthusiast, and musician.
      Wogg Music

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      • #18
        "I don't get it."

        Originally posted by wogg View Post
        I love the name. Most of my designs could have that same name
        Just agreeing on the great name. I'd venture to say that would be a great name for a lot of our projects ... the hypotheticals. How many of us have went through all the processes of designing and building our best speaker EveR ... but never actually got around to building it.

        Just saying.

        I'll have to give fprawn's tracer a try.
        http://techtalk.parts-express.com/fo...khanspires-but
        http://techtalk.parts-express.com/fo...pico-neo-build
        http://techtalk.parts-express.com/fo...ensation-build

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        • #19
          Wolf, when you import the image to fprawn's tracer how do you normally do so. I'm using foxit reader for the PDF's taking just a snapshot of the graphs but the resolution on them is so low that the tracer has no idea what to follow. I've tried taking bigger and smaller snippits but the tracer only follows about a 1/4 of it before going in some random direction.

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          • #20
            Zoom the PDF to fill your screen (even 200-300%), then do a "PrtScr" and paste. SOMEtimes (if the PDF's native image res is too low) the tracer just can't get the whole curve in one piece. Just do it in chunks and edit the text files together.

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            • #21
              I use MSPaint. I like MWsnap3 to snap the image. Import to MSPaint, select all, copy.

              While you're in paint you can also draw a colored line overtop the plot for better/easier tracing. John likes to print the plot, sharpie-color the graph, and scan back in and import.

              Later,
              Wolf
              "Wolf, you shall now be known as "King of the Zip ties." -Pete00t
              "Wolf and speakers equivalent to Picasso and 'Blue'" -dantheman
              "He is a true ambassador for this forum and speaker DIY in general." -Ed Froste
              "We're all in this together, so keep your stick on the ice!" - Red Green aka Steve Smith

              *InDIYana event website*

              Photobucket pages:
              http://photobucket.com/Wolf-Speakers_and_more

              My blog/writeups/thoughts here at PE:
              http://techtalk.parts-express.com/blog.php?u=4102

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              • #22
                Originally posted by Chris Roemer View Post
                Zoom the PDF to fill your screen (even 200-300%), then do a "PrtScr" and paste. SOMEtimes (if the PDF's native image res is too low) the tracer just can't get the whole curve in one piece. Just do it in chunks and edit the text files together.
                Did you know that Alt-PrtScr will copy only the active window (instead of the entire screen / desktop)? Saves a little time here and there ...

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                • #23
                  The Windows Snipping Tool is my friend. Sent from my SM-G920P using Tapatalk
                  Electronics engineer, woofer enthusiast, and musician.
                  Wogg Music

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                  • #24
                    I was also considering using these Dayton woofers. I like the sensitivity and they should sound better than the KEF Chorale III's that i have. Not to mention i'd only have to come up with the ZMA/FRD files just for the Vifa tweeter which i'm still trying to do. https://www.parts-express.com/dayton...4-ohm--295-371

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                    • #25
                      Originally posted by Bholt;n1353096Not to mention i'd only have to come up with the ZMA/FRD files just for the Vifa tweeter which i'm still trying to do. [url
                      https://www.parts-express.com/dayton-audio-rs125p-4-5-reference-paper-woofer-4-ohm--295-371[/url]
                      bc25sc06-04 .zma and .frd

                      bc25sc06-04 frd.frd

                      bc25sc06-04 zma.zma

                      Made with spltrace, deleted commentary lines.



                      http://techtalk.parts-express.com/fo...khanspires-but
                      http://techtalk.parts-express.com/fo...pico-neo-build
                      http://techtalk.parts-express.com/fo...ensation-build

                      Comment

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