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ISO Project designer of: M6N 2-way (Greg) Published October 7

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  • #16
    Originally posted by Chris Roemer View Post
    Here we go (this is for the Dayton ND20 tweeter):

    2nd order HP w/L-pad: 4uF series cap, 0.25mH shunt coil (to gnd), "L": SR = 4n / PR = 4n(ohms) - reverse polarity is indicated on tweeter - try it both ways

    Woofer - "tanked" 3rd order: 1.6mH series coil (w/a "tiny" cap across it to act as a notch filter = 0.22uF), then a 4uF shunt cap (to gnd), lastly a 0.52mH series coil.

    This runs around 83dB w/essentially NO baffle step comp. Fc near 3.7kHz. I think they'll be fine for surround (on wall) duties.
    Oh no. I am embarrassed now. I do not follow most of that. MY brain doesn't work this way. I can't read a description of a crossover like this and draw it out. I can follow a schematic, I have all of the necessary components... but that's about as far as I can go with this. Sorry to waste your time but we're obviously light years away from each other in ability here. I didn't want you to think I didn't appreciate it, because I do. I just can't build whatever it is you're describing here. Again... really sorry to waste your time and skills on my stupidity.
    My Studio Music Production Gear: http://equipboard.com/spaker
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    • #17
      Here you go Spaker. As described by Chris.

      Click image for larger version

Name:	Schematic.PNG
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      Electronics engineer, woofer enthusiast, and musician.
      Wogg Music
      Published projects: PPA100 Bass Guitar Amp, ISO El-Cheapo Sub, Indy 8 2.1 powered sub, MicroSat, SuperNova Minimus

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      • #18
        Thank you wogg.

        I like the XO work, but not screwing w/drawing it out (except sometimes on paper w/pencil).
        I CAN scribble it out w/ MSPaint, but it ends up looking so embarrassing !

        Spaker - no worries. It's not that complicated. I describe an XO (as if) drawn from left to right (which is amp to driver), this is sort of the "convention".
        You know cap values (uF), inductor/coils (mH), and resistors (ohms - or "n" as I like to call it)
        Both (lines to) the tweeter and woofer start at the amp (the "+" or red terminal, actually).
        SERIES components just mean that they are in the line (from the amp) to the speaker.
        SHUNT parts run (off that "series" line) to GROUND (the upside down triangle - or Xmas tree, if you will). All those gnd. points CAN be tied together (if you like). They all actually have to make their way back to the amp's "-" or black terminal.

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        • #19
          Originally posted by wogg View Post
          Here you go Spaker. As described by Chris. Click image for larger version

Name:	Schematic.PNG
Views:	146
Size:	6.1 KB
ID:	1425718
          Oh! oh! I can do THAT! No problemo. I read pictures real good. My reading of words no so good Sent from my SM-G892A using Tapatalk
          My Studio Music Production Gear: http://equipboard.com/spaker
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          • #20
            Originally posted by Chris Roemer View Post
            Thank you wogg. I like the XO work, but not screwing w/drawing it out (except sometimes on paper w/pencil). I CAN scribble it out w/ MSPaint, but it ends up looking so embarrassing ! Spaker - no worries. It's not that complicated. I describe an XO (as if) drawn from left to right (which is amp to driver), this is sort of the "convention". You know cap values (uF), inductor/coils (mH), and resistors (ohms - or "n" as I like to call it) Both (lines to) the tweeter and woofer start at the amp (the "+" or red terminal, actually). SERIES components just mean that they are in the line (from the amp) to the speaker. SHUNT parts run (off that "series" line) to GROUND (the upside down triangle - or Xmas tree, if you will). All those gnd. points CAN be tied together (if you like). They all actually have to make their way back to the amp's "-" or black terminal.
            ok. ok. ok deserve the dummed down version. I asked for it for christ sakes. seriously. thanks for taking the time. now that you did, I will follow thru and build it. today (dec 20, 2019) is my kids last day of school before an ungodly SIXTEEN days off. Christmas and New Years falling on Wednesday's means our district all the sudden gets real about having any 1 or 2 day school weeks at either end of the holidays. But that means I need a very important thing to do during those 16 days, and cannot be bothered. I will act as if my work hinges on separating conjoined twins, attached at the forehead, with a single -but double size- brain. The twins will survive. The brain surgery is unprecedented in medicine. One twin will have their entire memory wiped, yet have the capacity, moving forward, to be Einstein level genius. The other twin will retain all information it has already, but ultimately grow to resent and even hate her much more interesting "genius" sister. She'll slowly poison her meals over a period of years. The genius twin will die and the world scientific community will mourn as one big family. The deceased twin academic publications and books will be celebrated at institutes for higher learning for decades. Her death will be chalked up to complications from her original separation surgery. But I will know the truth- that surgery was flawless. I will hire teams of investigators that all want to point to the sister, but on hunches and gut feeling alone, as there is no proof. On her deathbed, 57 years later, the surviving twin will whisper a few words to the priest the staff have summoned to administer her last rights. "I got all her money. I took all her men. I had the time of my life... and all I had to do for it was kill that bitch." Sent from my SM-G892A using Tapatalk
            My Studio Music Production Gear: http://equipboard.com/spaker
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