Version 4
SHEET 1 1788 1012
WIRE -96 -320 -304 -320
WIRE -64 -320 -96 -320
WIRE -304 -256 -304 -320
WIRE -64 -240 -64 -320
WIRE 32 -240 -64 -240
WIRE 32 -144 -64 -144
WIRE -304 -96 -304 -176
WIRE -64 -96 -64 -144
WIRE 16 48 -16 48
WIRE 128 48 96 48
WIRE 160 48 128 48
WIRE 272 48 240 48
WIRE -224 144 -304 144
WIRE -160 144 -224 144
WIRE -16 144 -16 48
WIRE -16 144 -80 144
WIRE 16 144 -16 144
WIRE 128 144 128 48
WIRE 128 144 96 144
WIRE 160 144 128 144
WIRE 272 144 272 48
WIRE 272 144 240 144
WIRE 352 144 272 144
WIRE 512 144 352 144
WIRE 688 144 512 144
WIRE 352 176 352 144
WIRE 688 176 688 144
WIRE -304 192 -304 144
WIRE 512 192 512 144
WIRE -304 304 -304 272
WIRE 352 304 352 256
WIRE 512 304 512 256
WIRE 512 304 352 304
WIRE 688 304 688 256
WIRE 688 304 512 304
WIRE 352 320 352 304
FLAG -64 -96 0
FLAG -304 -96 0
FLAG -304 304 0
FLAG 352 320 0
FLAG -96 -320 z
FLAG -224 144 z1
SYMBOL EL_SPEAKER 80 -192 R0
SYMATTR Value SP100
SYMATTR InstName U1
SYMBOL cap 496 192 R0
SYMATTR InstName C1
SYMATTR Value {250µ/0.95}
SYMBOL res -176 160 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 0 56 VBottom 2
SYMATTR InstName R0
SYMATTR Value 5.7
SYMBOL ind 336 160 R0
SYMATTR InstName L1
SYMATTR Value {28m*0.95}
SYMBOL res 672 160 R0
SYMATTR InstName R1
SYMATTR Value 56.4
SYMBOL ind 144 160 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 5 56 VBottom 2
SYMATTR InstName L3
SYMATTR Value {l3}
SYMBOL res 144 64 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 0 56 VBottom 2
SYMATTR InstName R3
SYMATTR Value {r3}
SYMBOL ind 0 160 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 5 56 VBottom 2
SYMATTR InstName L2
SYMATTR Value {l2}
SYMBOL res 0 64 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 0 56 VBottom 2
SYMATTR InstName R2
SYMATTR Value {r2}
SYMBOL current -304 -176 M180
WINDOW 0 24 80 Left 2
WINDOW 3 24 0 Left 2
SYMATTR InstName I1
SYMATTR Value AC 1
SYMBOL current -304 272 M180
WINDOW 0 24 80 Left 2
WINDOW 3 24 0 Left 2
SYMATTR InstName I2
SYMATTR Value AC 1
TEXT -328 -392 Left 2 !.ac dec 100 10 20k
TEXT -32 -176 Left 2 ;Z
TEXT -328 -504 Left 2 ;Using a Z(freq) table\n \n(All in blue text is just comment)
TEXT 40 -312 Left 2 ;Z(freq)
TEXT -56 -392 Left 2 !.inc SP100.txt
TEXT 64 208 Left 2 ;Skin Effekt
TEXT -328 -552 Left 4 ;Equivalent Speaker Circuit
TEXT 248 -536 Left 2 !.param r2opt=2.6\n.param l2opt=255u\n.param r3opt=30\n.param l3opt=48u\n.param r2={r2opt}\n.param l2={l2opt}\n.param r3={r3opt}\n.param l3={l3opt}
TEXT 512 -496 Left 2 !.MEASURE AC cost INTEG abs(abs(V(z1)/V(z))-1)/freq
TEXT 504 -408 Left 3 ;Manual Optimization Procedure
TEXT 520 -536 Left 3 ;Cost function
TEXT 504 -368 Left 2 ;L1, C1 for center frequency\nR0 at f=10Hz\nR1 for mimmum cost function\n*facor, /factor of L1, C1 for minimum cost function\nR2, L2 for mimmum cost function\nR3, L3 for mimmum cost function
LINE Normal 8 -208 -56 -208
LINE Normal -8 -224 8 -208
LINE Normal -8 -224 -8 -224
LINE Normal 8 -208 -8 -224
LINE Normal -8 -192 8 -208
LINE Normal -8 -192 -8 -192
RECTANGLE Normal 784 352 -176 -32 2
RECTANGLE Normal 288 224 -32 0 2
RECTANGLE Normal 1104 -464 496 -560 2