Build an LM1875 gainclone amplifier + Cmoy preamp

Build an LM1875 gainclone amplifier + Cmoy preamp

This time, I want to make an amp that can produce a very detailed, smooth, and clear sound, namely the gainclone LM1875.

This LM1875 gainclone amp requires only a few components which are certainly easy to find on the market. The power that this amp can produce is about 2X20Watt only.

However, the sound produced is very good. The separation is good, the bass is decent, the vocals are clear and the treble is crisp but not ear-piercing. No wonder this LM1875 amp is loved by audiophiles.

For those of you who want to make it, I will attach a Gerber file that you can use to print to PCBWay. there is also a pdf file if you want to print it yourself.

Here's a schematic of the gainclone LM1875 plus preamp with the addition of a simple cmoy preamp to its input

The addition of this pre-amp serves to increase the input signal to a better level so that this lm1875 amp gets a sufficient input voltage, and the selection of the op-amp ic here greatly affects the sound that will be produced by this amp, so please choose an op-amp ic best you like.

The following is an example of the layout of the LM1875 gainclone amp that I made:

So that your PCB is good and quality, I suggest printing PCB on PCBWay with the downloaded gerber file, the download link is at the end of the post.

By the way, PCBWay provides New Soldermask Colors - Pink, Gray, Orange, and Transparent.

Each additional choice in PCB manufacturing, means adding more customization for those of you who want to make PCBs on PCBWay, this is very important to interpret your project perfectly, especially for electronics enthusiasts and creative makers who like to show individuality. 

PCBWay offers you the most options for creating unique products, such as color and material customization.

The new solder mask colors include PINK, ORANGE, GRAY, and even TRANSPARENT. What’s more, to meet some clients’ needs, we also release the “Black Core PCB” materials, so you can use them for your specific requirement. Now you can check all the available solder mask colors at the "Advanced PCB" online quote page, and we're excited to see your new boards with these new glamorous colors!

New Soldermask PCBWay

Gainclone lm1875 amp component installation process:

You can watch the results of the soundcheck on the Barlex Respectaizer youtube video

Download gerber file   

Download file pdf nya