Here I present a very simple and powerful headphone amplifier Circuit using NE5534/2 . In addition to the IC NE5534/2, the circuit uses only few passive components and can easily generate a lot of sound from even the most inefficient headphones and there will be no compromise for the quality.
Circuit of 9 Volt Portable Headphone Amplifier
The 5534/2 is a low-distortion, low-noise device, having also the ability to drive low-impedance loads to a full voltage swing while maintaining low distortion. Furthermore, it is fully output short-circuit proof. Therefore, this circuit was implemented with a single 5532 chip forming a pair of stereo, inverting amplifiers, having an ac gain of about 3.5 and capable of delivering up to 3.6V peak-to-peak into a 32 Ohm load (corresponding to 50mW RMS) at less than 0.025% total harmonic distortion (1kHz & 10kHz).
List Component of Portable Headphone Amplifier
P1 = 22K R1 = 18K R2 = 68K R3 = 68K R4 = 68K R5 = 18K R6 = 68K C1 = 4.7uF/25v C2 = 4.7uF/25v C3 = 22pF C4 = 220uF/25v C5 = 220uF/25v C6 = 4.7uF/25v C7 = 22pF C8 = 220uF/25v J1 = 3.5mm Stereo Jack B1 = 9V Alkaline Battery IC1 = NE5532 or NE5534 SW1 = SPST Toggle SwitchCircuit From: www.redcircuits.com
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