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
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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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