DIY 5.1 Home Theater with Gainclone Power Amplifier

Hello, after a few busy days with making a 5.1-channel home theater project using a Ggainclone power amplifier, this finally comes with very satisfying results. It is undoubtedly the performance of the Gainclone amplifier, in this project I use LM1875 IC and also LM3886. The number of IC that I use 5 pieces LM1875 and also 2 pieces LM3886. 

Where is the LM1875 IC for controlling Front speakers, Rear, and Center. IC LM3886 I use to control speaker subwoofer. Some components for making this home theater project is not small as well. There are several amplifier supporting components such as stereo and mono tone control, subwoofer module, and also USB soundcard to separating the sound output from laptop/ pc into 6 channel: Front Left, Front Right, Rear Left, Rear Right, Bass / Subwoofer and Center.

First I do the power amplifier assembly LM3886 and LM1875 I have prepared all the necessary components, for the circuit scheme you can visit this page: 

• LM1875 Gainclone Amplifier Circuit
• LM3886 Gainclone Amplifier

Some components are ready to be assembled, for the more complete gainclone amplifier can visit the link above. IC LM1875 and also IC LM3886 you can buy at www.utsource.net and also other components you can buy the site at a relatively cheap price and good service. I myself bought IC Gainclone in utsource, very safe and comfortable buy there and do not hesitate to buy it I guarantee original.

You can visit this link to buy IC:

• Buy LM3886 Original
• Buy LM1875 Original

To buy it please you can register first at utsource.net if you feel confusion you can ask the customer service is very friendly.

After that, the components are ready to assemble on PCB and ready to solder, do not forget to pay attention first PCB line path is correct what not before do soldering. If it feels right ready to be soldered.

Soldering the Gainclone Amplifier

After it is soldered and ready to be assembled with tone control and power supply.

Wiring Circuit 5.1 Home Theater Gainclone Amplifier

After a good soldering and tested power amplifier. I have set up tone control, subwoofer filter, and also power supply. The power supply I use the switching mode power supply instead of using a conventional transformer.

To Assemble a tone control you can visit this link: Stereo tone control TL084 & Mono Tone Control 4558

Assemble the subwoofer filter you can visit this link: Subwoofer Module 4558

And also the power supply you can visit this link: DIY SMPS 10A 20-50VDC CT

Left / Right Left / Right Channel from TL084 stereo tone control to LM1875 stereo amplifier circuit

Channel Rear Left / Right from TL084 stereo tone control to LM1875 stereo amplifier circuit

Channel Center from Mono Tone Control 4558 to LM1875 mono amplifier circuit

Channel Bass / Subwoofer from 4558 Subwoofer module to LM3886 stereo Bridge amplifier circuit

voltage supply IC LM1875 I give voltage 25VDC CT, LM3886 power supply voltage I give 30VDC CT.

5.1 Home Theater Box Amplifier

Then for the amplifier box, I also make my own using plywood, aluminum, and acrylic as the material.

Add led to beautify box

Input-Output Terminals

I just added the output terminal with the usual terminal, you can also upgrade it yourself. Chanel FR, FL, RR, RL, and center of Gainclone LM1875 and Channel Bass / Subwoofer output from LM3886 Gainclone Power Amplifier.

USB Soundcard/ Decoder 5.1 Channel

This 5.1 channel decoder is necessary to generate 6 different channel signals, for this home theater amplifier input I take from USB soundcard that I bought from the online store at a relatively affordable price. But the weaknesses can only be able to play music from a PC or Laptop because he is like a soundcard. For the installation directly plug this USB soundcard into a laptop and install the driver to a PC or laptop, then install the application as shown below.

Just choose the picture with number 6 speakers, to make output 6 channel and connect the output to each input amplifier.

Speaker Placement 5.1 Home Theater Amplifier

After the amplifier is tried normally, prepare your speakers for placement like the picture above so as to get the sound quality alive. Below the video test from my home theater amplifier.

Wiring Circuit

 [Video Test] 5.1 Home Theater with Gainclone Power Amplifier 

Upgrade for subwoofer channel using Yiroshi Audio amplifier Project

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