198 lines
6.0 KiB
Plaintext
198 lines
6.0 KiB
Plaintext
Version 4
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SHEET 1 3960 2816
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WIRE -192 1200 -224 1200
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WIRE -80 1200 -112 1200
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WIRE 32 1200 -16 1200
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WIRE -224 1296 -224 1200
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WIRE -208 1296 -224 1296
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WIRE -96 1296 -128 1296
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WIRE -64 1296 -96 1296
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WIRE 32 1296 32 1200
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WIRE 32 1296 16 1296
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WIRE -96 1312 -96 1296
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WIRE -480 1344 -512 1344
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WIRE -352 1344 -400 1344
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WIRE -240 1344 -288 1344
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WIRE -96 1392 -96 1376
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WIRE -512 1440 -512 1344
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WIRE -512 1440 -592 1440
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WIRE -496 1440 -512 1440
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WIRE -384 1440 -416 1440
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WIRE -336 1440 -384 1440
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WIRE -240 1440 -240 1344
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WIRE -240 1440 -256 1440
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WIRE -224 1440 -224 1296
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WIRE -224 1440 -240 1440
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WIRE -128 1440 -224 1440
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WIRE -592 1456 -592 1440
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WIRE -384 1456 -384 1440
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WIRE 32 1456 32 1296
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WIRE 32 1456 -64 1456
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WIRE 64 1456 32 1456
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WIRE -128 1472 -144 1472
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WIRE -592 1552 -592 1536
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WIRE -384 1552 -384 1520
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WIRE 224 1584 208 1584
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WIRE 320 1584 304 1584
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WIRE -880 1648 -896 1648
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WIRE -784 1648 -800 1648
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WIRE -560 1648 -576 1648
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WIRE -464 1648 -480 1648
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WIRE 400 1744 272 1744
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WIRE 560 1744 464 1744
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WIRE 272 1760 272 1744
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WIRE 560 1760 560 1744
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WIRE -880 1776 -896 1776
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WIRE -784 1776 -800 1776
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WIRE -560 1776 -576 1776
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WIRE -464 1776 -480 1776
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WIRE 64 1776 64 1456
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WIRE 224 1776 64 1776
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WIRE 272 1856 272 1840
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WIRE 560 1856 560 1840
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WIRE -880 1904 -896 1904
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WIRE -784 1904 -800 1904
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FLAG 224 1824 0
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FLAG 272 1856 0
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FLAG 560 1744 OUT
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FLAG 560 1856 0
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FLAG -592 1552 0
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FLAG -96 1392 0
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FLAG -384 1552 0
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FLAG -144 1472 0
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FLAG -896 1648 0
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FLAG -896 1776 0
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FLAG -896 1904 0
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FLAG -576 1648 0
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FLAG -576 1776 0
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FLAG 64 1456 EQ
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FLAG 208 1584 0
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FLAG -592 1440 IN
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DATAFLAG -784 1648 ""
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DATAFLAG -784 1776 ""
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DATAFLAG -784 1904 ""
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DATAFLAG -464 1648 ""
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DATAFLAG -464 1776 ""
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DATAFLAG 320 1584 ""
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SYMBOL e 272 1744 R0
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SYMATTR InstName E1
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SYMATTR Value 1
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SYMBOL cap 464 1728 R90
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WINDOW 0 0 32 VBottom 2
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WINDOW 3 32 32 VTop 2
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WINDOW 123 53 32 VTop 2
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SYMATTR InstName C1
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SYMATTR Value {Cspk}
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SYMATTR Value2 Rser={Rspk}
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SYMBOL ind 544 1744 R0
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SYMATTR InstName L1
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SYMATTR Value {Lspk}
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SYMATTR SpiceLine Rser=0
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SYMBOL voltage -592 1440 R0
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SYMATTR InstName V1
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SYMATTR Value ac 1
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SYMBOL res -400 1424 R90
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WINDOW 0 0 56 VBottom 2
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WINDOW 3 32 56 VTop 2
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SYMATTR InstName R1
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SYMATTR Value {R1}
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SYMBOL res -240 1424 R90
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WINDOW 0 0 56 VBottom 2
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WINDOW 3 32 56 VTop 2
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SYMATTR InstName R2
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SYMATTR Value {R1}
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SYMBOL res -384 1328 R90
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WINDOW 0 0 56 VBottom 2
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WINDOW 3 32 56 VTop 2
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SYMATTR InstName R3
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SYMATTR Value {R2}
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SYMBOL res -96 1184 R90
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WINDOW 0 0 56 VBottom 2
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WINDOW 3 32 56 VTop 2
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SYMATTR InstName R4
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SYMATTR Value {R2}
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SYMBOL res -112 1280 R90
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WINDOW 0 0 56 VBottom 2
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WINDOW 3 32 56 VTop 2
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SYMATTR InstName R5
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SYMATTR Value {R3}
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SYMBOL res 32 1280 R90
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WINDOW 0 0 56 VBottom 2
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WINDOW 3 32 56 VTop 2
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SYMATTR InstName R6
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SYMATTR Value {R3}
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SYMBOL cap -16 1184 R90
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WINDOW 0 0 32 VBottom 2
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WINDOW 3 32 32 VTop 2
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SYMATTR InstName C2
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SYMATTR Value {C2}
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SYMBOL cap -288 1328 R90
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WINDOW 0 0 32 VBottom 2
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WINDOW 3 32 32 VTop 2
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SYMATTR InstName C3
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SYMATTR Value {C2}
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SYMBOL cap -400 1456 R0
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SYMATTR InstName C4
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SYMATTR Value {C1}
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SYMBOL cap -112 1312 R0
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SYMATTR InstName C5
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SYMATTR Value {C3}
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SYMBOL voltage -784 1648 R90
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WINDOW 0 -32 56 VBottom 2
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WINDOW 3 32 56 VTop 2
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SYMATTR InstName V2
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SYMATTR Value {R1/1K}
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SYMBOL voltage -784 1776 R90
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WINDOW 0 -32 56 VBottom 2
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WINDOW 3 32 56 VTop 2
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SYMATTR InstName V3
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SYMATTR Value {R2/1K}
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SYMBOL voltage -784 1904 R90
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WINDOW 0 -32 56 VBottom 2
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WINDOW 3 32 56 VTop 2
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SYMATTR InstName V4
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SYMATTR Value {R3/1K}
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SYMBOL voltage -464 1648 R90
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WINDOW 0 -32 56 VBottom 2
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WINDOW 3 32 56 VTop 2
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SYMATTR InstName V5
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SYMATTR Value {C1/1u}
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SYMBOL voltage -464 1776 R90
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WINDOW 0 -32 56 VBottom 2
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WINDOW 3 32 56 VTop 2
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SYMATTR InstName V6
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SYMATTR Value {C3/1u}
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SYMBOL voltage 320 1584 R90
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WINDOW 0 -32 56 VBottom 2
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WINDOW 3 32 56 VTop 2
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SYMATTR InstName V7
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SYMATTR Value {Vb}
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SYMBOL opamps\\UniversalOpamp2 -96 1456 R0
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SYMATTR InstName U1
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SYMATTR SpiceModel level.1
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TEXT 136 1376 Left 2 !.param Vb = Vas / ((Qtc/Qts) * (Qtc/Qts) - 1.)\n.param Fc = Fs * sqrt(( Vas/Vb) + 1.) \n.param Lspk = 1\n.param Cspk = 1. / (39.47842 * Fc * Fc * Lspk)\n.param Rspk = 6.2831853 * Fc / Qtc
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TEXT 136 1152 Left 2 !.param Fs =95\n.param Qts=0.472\n.param Vas=0.04481
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TEXT 440 2008 Left 2 !.ac oct 10 10 10K
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TEXT -1248 1368 Left 2 !.param k = (Fc0/Fcx-Qt0/Qtx)/(Qt0/Qtx-Fcx/Fc0)\n.param R1 = (1/(2*pi*Fc0*C2*(2*Qt0*(1+k))))\n.param R2 = 2*k*R1\n.param R3 = R1*(Fc0/Fcx)**2\n.param C1 = C2*(2*Qt0*(1+k))**2\n.param C3 = C1*(Fcx/Fc0)**2\n;.param gain=40*Log10(Fc0/Fcx) ; FYI
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TEXT -576 1096 Top 2 ;Linkwitz-Riley Transform: equalize a driver in a sealed box to a different Q and cutoff frequency
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TEXT 416 1096 Top 2 ;Driver Characteristics
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TEXT 408 1264 Top 2 ;Sealed Box
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TEXT 440 1912 Center 2 ;Plot V(eq) to see Linkwitz transfer function\nPlot V(out)/V(eq) to see speaker transfer function\nPlot V(out) for net transfer function
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TEXT 432 1672 Top 2 ;Voltage to Sound Pressure Level Equiv. Circuit
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TEXT -184 1992 Top 2 ;This example schematic is supplied for informational/educational purposes only.
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TEXT -224 1080 Bottom 2 ;This is the theory of the PA system used in the 2015 World Circuit Seminar\nTour except (i) the electronics I traveled with include baffle step\ncompensation (ii) the microphone aperture was adjusted to add\n4dB @ 16kHz to enhance sibilance and (iii) the drivers were a vertical array.
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TEXT -472 1880 Center 2 ;These voltage sources read\nout the component values to\nimplement the equalizer
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TEXT 560 1552 Center 2 ;Sealed box\nvolume in same\nunits as Vas
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TEXT -592 1168 Center 2 ;Input Parameters
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TEXT 168 1320 Left 2 !.param Qtc = 0.7071
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TEXT 536 1320 Center 2 ;Input parameter
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TEXT 544 1152 Center 2 ;Input parameters appropriate\nfor the Fountek FR88EX\n 3" Full Range Al cone
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TEXT -1256 1152 Left 2 !.param C2=.047u\n.param Fc0 = Fc ; Fc untransformed\n.param Qt0 = Qtc ; Qtc untransformed\n.param Fcx = 80 ; Fc transformed(chosen on spectral analysis of my voice)\n.param Qtx = 0.7071 ; Qtc transformed
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RECTANGLE Normal 96 1984 -1280 1088 2
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RECTANGLE Normal -288 1968 -960 1584 2
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RECTANGLE Normal 672 1648 176 1520 2
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RECTANGLE Normal 672 1344 144 1296 2
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RECTANGLE Normal 736 1248 128 1088 2
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RECTANGLE Normal 752 1888 128 1264 2
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RECTANGLE Normal -336 1288 -1264 1128 2
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