Headphone Amp with 3D Sound
Sound reinforcement for iPod & Co.
Materials
Gerber file
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Component list
Resistors
(SMD 1206 case)
R1,R21 = 33
R2,R22 = see text
R3,R23 = 15k
R4, R24 = 560
R5,R25,R43,R44 = 33k
R6,R12,R26,R32 = 100k
R7,R11,R27,R31 = 1k
R8,R28 = 1kΩ5
R9,R29,R41,R42,R45,R46,R47 = 10k
R10,R30 = 330k
R13,R33 = 2kΩ7
R14,R50,R122,R222 = 0
Capacitors
(SMD 1206 case unless otherwise indicated
C1,C21 = 22nF
C2,C22 = see text
C3,C4,C5,C7,C23,C24,C25 = 470nF
C6,C26 = 470pF
C41,C42,C43 = 4µF7 (SMD 1812)
C44,C45 = 1µF
C50 = 100µF 16V radial (can-style electrolytic)
Semiconductors
T1-T4 = BC847 (SOT-23)
IC1 = MAX4409EUD+ (14-pin TSSOP; Maxim)Miscellaneous
3.5-mm stereo socket, PCB mount with collet nut
PCB, order code 070393-1 from www.thepcbshop.com
Enclosure
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