Transistored 10W Audio Amplifier


Posted on Feb 4, 2014

Build based operational amplifier NE5532 and a couple of power transistor TIP41A / TIP42A, this audio amplifier circuit has capability to deliver up to 10W audio power output into 8 ohm speaker. This circuit is related to the 18 Watt Audio Amplifier, and was designed mainly to satisfy the requests of correspondents unable to locate the TLE2141C c


Transistored 10W Audio Amplifier
Click here to download the full size of the above Circuit.

hip. It works with the widespread NE5532 Dual IC but, certainly, its capability output is going to be comprised around the 9. 5 11. 5W range, because the voltage supply rails can not exceed ±18V. As amplifiers of this variety are usually applied to drive small loudspeaker cabinets, the bass frequency range is rather sacrificed. As a result a bass-boost manage was inserted within the feedback loop of the amplifier, so as to overcome this issue with out top quality losses. The bass lift curve can reach a maximum of +16. 4dB @ 50Hz. In any case, even when the bass manage is rotated totally counterclockwise, the amplifier frequency response shows a gentle raising curve: +0. 8dB @ 400Hz, +4. 7dB @ 100Hz and +6dB @ 50Hz (referred to 1KHz). A right grounding is extremely necessary to eradicate hum and ground loops. Connect for the identical point the ground sides of J1, P1, C2, C3 &C4. Connect C9 towards the output ground. Then connect separately the input and output grounds to the power supply ground.




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