Here is a headphone guitar amplifier from Nobels. This is an excellent sounding little box. Crystal clean tones, awesome overdrive and distortion selections too. Offboard connections are not shown. The selector switch is a DP3T(double pole - three throw) ie like the one used in diy sansamp GT-2(Alco switch). Switching configuration is this:
P1 T1 T2 T3
P2 T1 T2 T3
Each point corresponds each pins of the switch. Layout is verified!
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