Saturday, November 17, 2018

5.1 Home theater Power Amplifier with Gainclone LM1875 + LM3886

At this time I will share about the power amplifier which is devoted to the use of a home theater that has a 5.1 / 6 channel amplifier that is, front right. front left, rear right, rear left, center, and subwoofer. For each channel, I use the LM1875 gainclone amplifier and specifically for the subwoofer channel I use the IC gainclone LM3886 which I BTL has to be more powerful to move the subwoofer speaker.

Why am I using a gainclone amplifier? because this gainclone amplifier has a very clear output due to very low noise and very low distortion. But the power output is'nt big, for the LM1875 it has a power output of around 20W and the LM3886 has a power of around 68W.

Here's the 5.1 power amplifier circuit with Gainclone:
5.1 Home theater Power Amplifier with Gainclone LM1875 + LM3886
Download Schematic.PDF for more detail and part list in BoM file at the end of post

The 5.1 Home theater power amplifier scheme above is equipped with a power supply circuit, preamplifier, subwoofer preamplifier, and also a 15V power supply regulator circuit for the preamplifier. This power amplifier is not equipped with a 5.1 sound processor, so to get a more 3D sound you can add 5.1 sound processor. Or you can take input from a soundcard that already has 5.1 audio output system. And this amplifier required analog audio input.

Power supply specifications:
Minimum power supply: 15VAC 5A
Maximum power supply: 24VAC 10A

PCB Layout 5.1 Home theater Power Amplifier with Gainclone LM1875 + LM3886
PCB Layout 5.1 Home theater Power Amplifier with Gainclone LM1875 + LM3886

Check this building video 5.1 Home theater Power Amplifier with Gainclone LM1875 + LM3886
Download
Schematic Power Amplifier 5.1 with Gainclone LM1875 + LM3886
BoM (Part List) Power Amplifier 5.1 with Gainclone LM1875 + LM3886
Gerber File (PCB Production) Power Amplifier 5.1 with Gainclone LM1875 + LM3886

Electronic Circuit is a good site for hobbyist also who would like to try DIY because it shared good circuits. If you have a personalized circuit requirement you may feel free to request it through the comment box or contact me.


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