The Chu Moy Pocket Headphone Amplifier is a very simple, yet, quite good sounding amplifier. As the name says, it is intended for use with headphones. This little amp can be very effective in combination with a discman for example. You could put the discman volume at a very low level, thus using less battery power. The amplifier only needs a minimum number of parts and can be build as small as the 9v battery it needs for power. However, it’s not possible to convert that layout into a PCB
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