Version 4 SHEET 1 1856 1012 WIRE 512 -80 480 -80 WIRE 672 -80 512 -80 WIRE 512 -64 512 -80 WIRE 672 -64 672 -80 WIRE 816 -64 736 -64 WIRE 448 -32 208 -32 WIRE 512 -32 544 -64 WIRE 576 -32 640 -64 WIRE 736 -32 672 -64 WIRE 880 -32 736 -32 WIRE 480 0 480 -80 WIRE 544 0 544 -32 WIRE 576 0 544 0 WIRE 768 0 736 -32 WIRE 880 0 880 -32 WIRE 544 32 544 0 WIRE 608 32 736 -64 WIRE 608 32 576 32 WIRE 672 32 736 0 WIRE 208 64 208 -32 WIRE 512 64 512 -32 WIRE 608 64 672 32 WIRE 704 64 704 32 WIRE 448 96 448 32 WIRE 480 96 480 32 WIRE 512 96 480 96 WIRE 544 96 576 32 WIRE 736 96 736 64 WIRE 736 96 608 96 WIRE 912 96 736 96 WIRE 480 128 480 96 WIRE 608 128 608 96 WIRE 608 128 560 128 WIRE 736 128 736 96 WIRE 480 160 480 128 WIRE 608 160 608 128 WIRE 704 160 704 128 WIRE 432 176 448 128 WIRE 560 192 560 128 WIRE 608 192 672 160 WIRE 816 192 736 192 WIRE 880 224 880 80 WIRE 880 224 736 224 WIRE 752 240 736 224 WIRE 880 240 880 224 WIRE 512 256 512 128 WIRE 640 256 736 192 WIRE 640 256 608 224 WIRE 672 256 736 224 WIRE 704 256 672 160 WIRE 736 256 704 256 WIRE 704 288 544 288 WIRE 448 304 560 192 WIRE 464 304 512 256 WIRE 624 304 480 192 WIRE 448 320 448 304 WIRE 512 320 480 320 WIRE 544 320 544 288 WIRE 544 320 512 320 WIRE 704 320 704 288 WIRE 704 320 672 320 WIRE 816 320 736 320 WIRE 912 320 912 96 WIRE 480 352 448 352 WIRE 544 352 512 352 WIRE 576 352 640 320 WIRE 736 352 672 320 WIRE 768 352 768 0 WIRE 768 352 736 352 WIRE 464 368 464 304 WIRE 448 384 464 368 WIRE 576 384 544 384 WIRE 448 416 448 384 WIRE 480 416 480 352 WIRE 512 416 512 352 WIRE 544 416 544 384 WIRE 608 416 736 320 WIRE 608 416 576 416 WIRE 672 416 736 384 WIRE 448 448 448 416 WIRE 480 448 480 416 WIRE 512 448 480 448 WIRE 608 448 672 416 WIRE 704 448 704 416 WIRE 432 464 432 176 WIRE 624 464 624 304 WIRE 448 480 432 464 WIRE 480 480 448 480 WIRE 544 480 576 416 WIRE 608 480 624 464 WIRE 736 480 736 448 WIRE 736 480 608 480 WIRE 912 480 912 400 WIRE 912 480 736 480 WIRE 736 512 736 480 WIRE 608 544 608 480 WIRE 704 544 704 512 WIRE 512 576 512 480 WIRE 608 576 672 544 WIRE 816 576 736 576 WIRE 752 592 752 240 WIRE 736 608 752 592 WIRE 208 640 208 144 WIRE 480 640 480 480 WIRE 480 640 208 640 WIRE 512 640 480 640 WIRE 640 640 736 576 WIRE 640 640 608 608 WIRE 672 640 736 608 WIRE 704 640 672 544 WIRE 736 640 704 640 WIRE 480 656 480 640 WIRE 672 656 672 640 WIRE 672 656 480 656 FLAG 880 240 0 SYMBOL 2N3906 576 0 R180 WINDOW 0 -14 0 Center 0 SYMATTR InstName Q1 SYMBOL 2N3904 512 96 R0 WINDOW 0 -5 0 Center 0 SYMATTR InstName Q3 SYMBOL 2N3904 480 416 R90 WINDOW 0 -12 -7 VCenter 0 SYMATTR InstName Q4 SYMBOL rn55upright 512 -32 R0 WINDOW 0 0 0 Invisible 0 SYMATTR InstName R2 SYMATTR Value 5K SYMATTR Type rn55 SYMBOL 2N3904 608 64 R0 WINDOW 0 -17 -3 Center 0 SYMATTR InstName Q9 SYMBOL 2N3906 608 192 R180 WINDOW 0 9 -17 Invisible 0 SYMATTR InstName Q10 SYMBOL RN55upright 640 -64 R90 WINDOW 0 -16 -16 Invisible 0 SYMATTR InstName R12 SYMATTR Value 500 SYMBOL RN55upright 640 256 R90 WINDOW 0 -16 -16 VBottom 0 SYMATTR InstName R13 SYMATTR Value 3K SYMBOL SMdiode 816 -32 R0 SYMATTR InstName D1 SYMATTR Value 1N4148 SYMBOL SMcap 544 64 M0 SYMATTR InstName C1 SYMATTR Value 100p SYMBOL rn55upright 480 32 R0 WINDOW 0 0 0 Invisible 0 SYMATTR InstName R17 SYMATTR Value 50K SYMATTR Type rn55 SYMBOL rn55upright 512 480 R0 WINDOW 0 -3 3 Invisible 0 SYMATTR InstName R21 SYMATTR Value 10K SYMATTR Type rn55 SYMBOL rn55upright 448 96 M270 WINDOW 0 16 -16 Invisible 0 SYMATTR InstName R22 SYMATTR Value 10K SYMATTR Type rn55 SYMBOL SMcap 448 0 R180 SYMATTR InstName C3 SYMATTR Value .33µ SYMBOL 2N3906 576 384 R180 WINDOW 0 -24 -1 Invisible 0 SYMATTR InstName Q2 SYMBOL 2N3904 608 448 R0 WINDOW 0 -17 -3 Invisible 0 SYMATTR InstName Q11 SYMBOL 2N3906 608 576 R180 WINDOW 0 2 -16 Invisible 0 SYMATTR InstName Q12 SYMBOL RN55upright 640 320 R90 WINDOW 0 -16 -16 Invisible 0 SYMATTR InstName R23 SYMATTR Value 500 SYMBOL RN55upright 640 640 R90 WINDOW 0 -16 -16 VBottom 0 SYMATTR InstName R24 SYMATTR Value 3K SYMBOL SMcap 544 448 M0 SYMATTR InstName C4 SYMATTR Value 100p SYMBOL voltage 208 48 R0 WINDOW 123 37 64 Left 0 SYMATTR Value2 AC 1 SYMATTR InstName V2 SYMATTR Value SINE(0 {A} 1K) SYMBOL RN55upright 544 352 R180 WINDOW 0 -18 -30 Invisible 0 SYMATTR InstName R25 SYMATTR Value 10K SYMBOL RN55upright 544 -64 R180 WINDOW 0 -18 -30 Invisible 0 SYMATTR InstName R14 SYMATTR Value 10K SYMBOL RN55upright 448 480 R0 WINDOW 0 -18 -30 Invisible 0 SYMATTR InstName R1 SYMATTR Value 10K SYMBOL RN55upright 480 480 R0 WINDOW 0 -18 -30 Invisible 0 SYMATTR InstName R16 SYMATTR Value 50K SYMBOL RN55upright 480 352 R0 WINDOW 0 -18 -30 Invisible 0 SYMATTR InstName R15 SYMATTR Value 50K SYMBOL RN55upright 512 352 R0 WINDOW 0 -18 -30 Invisible 0 SYMATTR InstName R3 SYMATTR Value 5K SYMBOL RN55upright 448 352 R0 WINDOW 0 -18 -30 Invisible 0 SYMATTR InstName R28 SYMATTR Value 200K SYMBOL RN55upright 480 160 R180 WINDOW 0 -18 -30 Invisible 0 SYMATTR InstName R20 SYMATTR Value 200K SYMBOL RN55upright 480 128 M90 WINDOW 0 -16 -16 Invisible 0 SYMATTR InstName R18 SYMATTR Value 50K SYMBOL UprightPowerResistor 672 32 R90 SYMATTR Value .2 SYMATTR InstName R26 SYMBOL UprightPowerResistor 672 160 R90 SYMATTR Value .2 SYMATTR InstName R5 SYMBOL UprightPowerResistor 736 64 R270 SYMATTR Value .2 SYMATTR InstName R4 SYMBOL UprightPowerResistor 736 128 R270 SYMATTR Value .2 SYMATTR InstName R6 SYMBOL UprightPowerResistor 736 448 R270 SYMATTR Value .2 SYMATTR InstName R7 SYMBOL UprightPowerResistor 672 416 R90 SYMATTR Value .2 SYMATTR InstName R8 SYMBOL UprightPowerResistor 672 544 R90 SYMATTR Value .2 SYMATTR InstName R9 SYMBOL UprightPowerResistor 736 512 R270 SYMATTR Value .2 SYMATTR InstName R10 SYMBOL SMdiode 816 32 R0 WINDOW 0 -1 -1 VCenter 0 SYMATTR InstName D2 SYMATTR Value 1N4148 SYMBOL SMdiode 816 96 R0 SYMATTR InstName D3 SYMATTR Value 1N4148 SYMBOL SMdiode 816 160 R0 SYMATTR InstName D4 SYMATTR Value 1N4148 SYMBOL SMdiode 816 352 R0 WINDOW 0 0 -3 VCenter 0 SYMATTR InstName D5 SYMATTR Value 1N4148 SYMBOL SMdiode 816 416 R0 WINDOW 0 0 -3 VCenter 0 SYMATTR InstName D6 SYMATTR Value 1N4148 SYMBOL SMdiode 816 480 R0 WINDOW 0 0 -3 VCenter 0 SYMATTR InstName D7 SYMATTR Value 1N4148 SYMBOL SMdiode 816 544 R0 WINDOW 0 0 -3 VCenter 0 SYMATTR InstName D8 SYMATTR Value 1N4148 SYMBOL MylarCap 512 576 R180 SYMATTR Value .33µ SYMATTR InstName C5 SYMBOL res 896 304 R0 SYMATTR InstName Speaker SYMATTR Value 8 SYMBOL voltage 880 -16 R0 WINDOW 3 23 94 Left 0 SYMATTR Value 19.5 SYMATTR InstName V3 SYMBOL TIP121 736 -32 R180 WINDOW 0 -38 -2 Center 0 SYMATTR InstName Q5 SYMATTR Prefix X SYMBOL TIP121 736 352 R180 WINDOW 0 -38 -2 Center 0 SYMATTR InstName Q7 SYMATTR Prefix X SYMBOL TIP127 736 224 R180 WINDOW 0 -34 -1 Center 0 SYMATTR InstName Q6 SYMATTR Prefix X SYMBOL TIP127 736 608 R180 WINDOW 0 -34 -1 Center 0 SYMATTR InstName Q8 SYMATTR Prefix X TEXT 800 608 Left 0 !.lib TIP121.LIB\n.lib TIP127.LIB TEXT 336 -56 Left 0 ;1" x 2.3" TEXT 1064 312 Left 0 !.tran 0 10m 0 1u TEXT 1040 432 Left 0 !.step param A .1 .7 .1 TEXT 1080 -48 Left 0 ;--- THD ---\n0.5W 0.07%\n1.0W 0.08%\n2.0W 0.11%\n3.0W 0.15%\n4.0W 0.21%\n5.0W 0.28%\n6.0W 0.37%\n7.0W 0.56%\n8.0W 1.13%\n9.0W 4.05%\n10.W 9.06% TEXT 1064 360 Left 0 !.four 1K I(Speaker)\n.option plotwinsize=0 TEXT 1024 496 Left 0 ;Notes:\n 1. Q5, Q6, Q7 and Q8 are on a heat sink.\n 2. D1 and D2 are epoxied onto the front side of Q5.\n 3. D3 and D4 are epoxied onto the front side of Q6.\n 4. D5 and D6 are epoxied onto the front side of Q7.\n 5. D6 and D8 are epoxied onto the front side of Q8. RECTANGLE Normal 752 656 432 -80 2