Version 4 SHEET 1 1692 1236 WIRE 64 480 -80 480 WIRE 80 480 64 480 WIRE 192 480 128 480 WIRE 288 480 256 480 WIRE 320 480 288 480 WIRE 400 480 384 480 WIRE 432 480 400 480 WIRE 512 480 496 480 WIRE 544 480 512 480 WIRE 624 480 608 480 WIRE 656 480 624 480 WIRE 752 480 736 480 WIRE 784 480 752 480 WIRE 880 480 864 480 WIRE 960 480 880 480 WIRE 1056 480 1008 480 WIRE 1088 480 1056 480 WIRE 128 512 128 480 WIRE 1008 512 1008 480 WIRE 80 528 80 480 WIRE 960 528 960 480 WIRE -80 544 -80 480 WIRE 288 544 288 480 WIRE 400 544 400 480 WIRE 512 544 512 480 WIRE 624 544 624 480 WIRE 752 576 752 480 WIRE 880 576 880 480 WIRE 80 608 80 576 WIRE 128 608 128 592 WIRE 128 608 80 608 WIRE 960 608 960 576 WIRE 1008 608 1008 592 WIRE 1008 608 960 608 WIRE -80 672 -80 624 WIRE 128 672 128 608 WIRE 288 672 288 624 WIRE 400 672 400 624 WIRE 512 672 512 624 WIRE 624 672 624 624 WIRE 752 672 752 640 WIRE 880 672 880 640 WIRE 1008 672 1008 608 FLAG -80 672 0 FLAG 288 672 0 FLAG 400 672 0 FLAG 512 672 0 FLAG 624 672 0 FLAG 752 672 0 FLAG 880 672 0 FLAG 1008 672 0 FLAG 1056 480 Vout FLAG 128 672 0 FLAG 64 480 Vin SYMBOL voltage -80 528 R0 WINDOW 3 -181 172 Left 0 WINDOW 123 24 132 Left 0 WINDOW 39 0 0 Left 0 SYMATTR Value "" SYMATTR Value2 AC 1 SYMATTR InstName V3 SYMBOL cap 256 464 R90 WINDOW 3 32 32 VTop 0 WINDOW 0 0 32 VBottom 0 SYMATTR Value 1.0µ SYMATTR InstName C1 SYMBOL res 272 528 R0 SYMATTR InstName R1 SYMATTR Value 7.5k SYMBOL cap 384 464 R90 WINDOW 3 32 32 VTop 0 WINDOW 0 0 32 VBottom 0 SYMATTR Value 0.1µ SYMATTR InstName C2 SYMBOL res 384 528 R0 SYMATTR InstName R2 SYMATTR Value 68k SYMBOL cap 496 464 R90 WINDOW 3 32 32 VTop 0 WINDOW 0 0 32 VBottom 0 SYMATTR Value 0.01µ SYMATTR InstName C3 SYMBOL res 496 528 R0 SYMATTR InstName R3 SYMATTR Value 22k SYMBOL cap 608 464 R90 WINDOW 3 32 32 VTop 0 WINDOW 0 0 32 VBottom 0 SYMATTR Value 0.01µ SYMATTR InstName C4 SYMBOL res 608 528 R0 SYMATTR InstName R4 SYMATTR Value 130k SYMBOL res 752 464 R90 WINDOW 0 0 56 VBottom 0 WINDOW 3 32 56 VTop 0 SYMATTR InstName R5 SYMATTR Value 15k SYMBOL cap 768 640 R180 WINDOW 3 -70 49 Left 0 WINDOW 0 -39 78 Left 0 SYMATTR Value 0.001µ SYMATTR InstName C5 SYMBOL res 880 464 R90 WINDOW 0 0 56 VBottom 0 WINDOW 3 32 56 VTop 0 SYMATTR InstName R6 SYMATTR Value 150k SYMBOL cap 896 640 R180 WINDOW 3 -47 50 Left 0 WINDOW 0 -31 75 Left 0 SYMATTR Value 100p SYMATTR InstName C6 SYMBOL e 1008 496 R0 SYMATTR InstName E2 SYMATTR Value 1.64 SYMBOL e 128 496 R0 SYMATTR InstName E1 SYMATTR Value 1 TEXT -112 280 Left 0 !;op TEXT -112 312 Left 0 !.ac dec 100 20 20k TEXT 400 272 Left 0 ;A Weighting Filter TEXT 728 824 Left 0 ;copyright Cordell Audio 11/30/2010