Version 4
SHEET 1 880 680
WIRE -400 32 -464 32
WIRE -288 32 -320 32
WIRE -240 32 -288 32
WIRE -144 32 -176 32
WIRE -48 32 -144 32
WIRE 240 32 32 32
WIRE -288 48 -288 32
WIRE -144 48 -144 32
WIRE 336 80 144 80
WIRE 336 96 336 80
WIRE 144 112 144 80
WIRE -288 128 -288 112
WIRE -208 128 -208 64
WIRE -208 128 -288 128
WIRE -144 128 -144 112
WIRE -144 128 -208 128
WIRE -112 128 -144 128
WIRE -16 128 -32 128
WIRE 112 128 -16 128
WIRE 208 144 176 144
WIRE 240 144 240 32
WIRE 240 144 208 144
WIRE 304 144 272 144
WIRE -464 160 -464 32
WIRE -416 160 -464 160
WIRE -304 160 -352 160
WIRE 112 160 96 160
WIRE -304 176 -304 160
WIRE -16 176 -16 128
WIRE 96 176 96 160
WIRE 272 176 272 144
WIRE 144 224 144 176
WIRE 336 224 336 192
WIRE 336 224 144 224
WIRE -304 272 -304 256
WIRE -16 288 -16 256
WIRE 96 288 96 256
WIRE -464 320 -464 160
WIRE -208 320 -464 320
WIRE -48 320 -144 320
WIRE 128 320 16 320
WIRE 240 320 240 144
WIRE 240 320 192 320
FLAG 96 288 0
FLAG 272 176 0
FLAG -304 272 0
FLAG 208 144 Out
SYMBOL Robertugo\\opamp5 144 80 R0
WINDOW 0 -29 64 Left 0
WINDOW 38 4 23 Left 0
SYMATTR InstName U1
SYMATTR SpiceModel Level3b
SYMBOL Robertugo\\Pote -80 304 M90
WINDOW 0 1 -36 VRight 0
WINDOW 3 2 92 VRight 0
WINDOW 123 -29 4 VCenter 0
SYMATTR InstName Treble
SYMATTR Value Rt=50K
SYMATTR Value2 Set={cur}
SYMBOL res -32 160 R0
WINDOW 0 29 48 Left 0
WINDOW 3 24 81 Left 0
SYMATTR InstName R1
SYMATTR Value 1k5
SYMBOL res 80 160 R0
WINDOW 0 -22 30 Left 0
WINDOW 3 -34 64 Left 0
SYMATTR InstName R2
SYMATTR Value 10k
SYMBOL cap 192 304 R90
WINDOW 0 16 58 VBottom 0
WINDOW 3 -11 -3 VTop 0
SYMATTR InstName C1
SYMATTR Value 68n
SYMBOL cap -144 304 R90
WINDOW 0 16 58 VBottom 0
WINDOW 3 -11 -3 VTop 0
SYMATTR InstName C2
SYMATTR Value 68n
SYMBOL Robertugo\\Pote -272 48 R270
WINDOW 0 30 -32 VRight 0
WINDOW 3 30 104 VRight 0
WINDOW 123 -96 62 VCenter 0
SYMATTR InstName Bass
SYMATTR Value Rt=50K
SYMATTR Value2 Set={cur}
SYMBOL res 48 16 R90
WINDOW 0 16 103 VBottom 0
WINDOW 3 -12 19 VTop 0
SYMATTR InstName R3
SYMATTR Value 5k
SYMBOL res -304 16 R90
WINDOW 0 17 105 VBottom 0
WINDOW 3 -12 20 VTop 0
SYMATTR InstName R4
SYMATTR Value 5k
SYMBOL cap -304 48 R0
WINDOW 0 -35 30 Left 0
WINDOW 3 -35 54 Left 0
SYMATTR InstName C3
SYMATTR Value 68n
SYMBOL cap -128 48 M0
WINDOW 0 -35 30 Left 0
WINDOW 3 -30 55 Left 0
SYMATTR InstName C4
SYMATTR Value 68n
SYMBOL res -16 112 R90
WINDOW 0 0 56 VBottom 0
WINDOW 3 32 56 VTop 0
SYMATTR InstName R5
SYMATTR Value 5k
SYMBOL Miscel\\v+&- 336 160 R180
WINDOW 0 -55 79 Left 0
SYMATTR InstName V+-
SYMATTR Value VNP=15
SYMBOL polcap -352 144 R90
WINDOW 0 16 63 VBottom 0
WINDOW 3 -12 -21 VTop 0
SYMATTR InstName C5
SYMATTR Value 2.2µ
SYMATTR Description Capacitor
SYMATTR Type cap
SYMATTR SpiceLine V=50 Irms=54m Rser=3 Lser=0 Rpar=1e7 mfg="Nichicon" pn="UPL1H2R2MAH" type="Al electrolytic"
SYMBOL Misc\\signal -304 160 R0
WINDOW 3 37 57 Left 0
WINDOW 123 37 84 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName Vin
SYMATTR Value2 AC 1
TEXT -454 304 Left 0 !.ac dec 100 1e1 1e5
TEXT 88 16 Left 0 !.step param cur 1 0 -1