B = 19.05; // Bushing outer diameter
M = 6.35; // Mill diameter
J = 100; // Mill pad
A = 5; // Alignment pad size
P = 17; // Alignment pad placement
BD = B - M; // Bushing offset

W = 150; // Internal width
H = 280; // Internal height
D = 240; // Internal depth

S = 5;
F = "IBM Plex Sans Condensed:style=Regular";

// Label
translate([400, 0]) {
  text("Kormoran", S, F, halign="center");
  translate([0, -S*1.5]) text("8Ω", S, F, halign="center");
  translate([0, -S*3]) text("55W", S, F, halign="center");
}

// Woofer mounting hole alignment
translate([-400, 0]) {
  difference()  {
    circle(d=146, $fn=100);
    for ( i = [0 : 45 : 360] ){
      rotate(i) {
          translate([138/2,0]) circle(d=4, $fn=30);
          translate([146/2,0]) rotate(45) square(1,center=true);
      }
    }
  }
}

translate([200, 0]) {
  difference() {
    square([W-BD, D+100], center=true);

    // Alignment squares
    translate([50,0]) rotate(45) square(A, center=true);
    translate([-50,0]) rotate(45) square(A, center=true);
    translate([0,150]) rotate(45) square(A, center=true);
    translate([0,-150]) rotate(45) square(A, center=true);

    // Terminal
    translate([0, +312/2-82]) {
      difference() {
       offset(r=BD/2) square([93, 80], center=true);
       offset(r=BD/2) square([76, 56], center=true);
      }
    }

    // Bass reflex tube
    translate([0, -312/2+60]) {
      circle(d=69-0.5+BD, $fn=100);
    }
  }
}

// Front/back groove
translate([-200, 0]) {
  difference() {
    square([W-BD, H-BD], center=true);
    translate([60,0]) rotate(45) square(A, center=true);
    translate([-60,0]) rotate(45) square(A, center=true);
    translate([0,120]) rotate(45) square(A, center=true);
    translate([0,-120]) rotate(45) square(A, center=true);

    difference()  {
      circle(d=90, $fn=100);
      for ( i = [0 : 90 : 360] ){
        rotate(i) {
            translate([82/2,0]) circle(d=4, $fn=30);
            translate([90/2,0]) rotate(45) square(1,center=true);
        }
      }
    }
  }
}

module alignment() {
  translate([95,0]) rotate(45) square(A, center=true);
  translate([-95,0]) rotate(45) square(A, center=true);
}

difference() {
  square([D-BD, H+100], center=true);

  // Horiz align
  translate([0,170]) rotate(45) square(A, center=true);
  translate([0,-170]) rotate(45) square(A, center=true);

  // Tweeter
  translate([0,15]) {
    alignment();
    translate([-182/2+117, +312/2-82]) {
      translate([0,-60]) rotate(45) square(A, center=true);
      translate([0,60]) rotate(45) square(A, center=true);

      difference() {
        circle(d=90+BD, $fn=100);
        circle(d=65+BD, $fn=100);
      }
    }
  }

  // Woofer
  translate([0,-15]) {
    alignment();
    translate([0, -312/2+110])
    difference() {
      circle(d=146+BD, $fn=100);
      circle(d=119+BD, $fn=100);
    }
  }
}