TL's elektronik ting og sager
4-channel TDA2030 based mini amp with built-in DAC
Back in 2008 I needed an amplifier for my PC and decided to build this little thing. It had to be a 4 channel amplifier because it had to be used for two small speakers and a subwoofer. I love large amplifiers, but this one had to be made quickly and with the things I just had lying around. It should have an S/P-Dif input so the sound was as clean as possible without hiss, hum and noise. I already had a DAC that fits perfectly with what I wanted to do. It also fit exactly in the box I wanted to use. Here you can check it out: DAC24192.
The DAC had two balanced outputs with XLR connectors. That was fine because now I wanted to use them for speaker connectors instead of signal outputs. I cutted the PCB tracks so I could put the amplifiers in between the DAC and the connectors. I wanted to finish this project quickly so I found four TDA2030 amplifier circuits and built them on a heat sink. I soldered it all together like a bird's nest.
Four outputs were smart for the two of them could be used for the small speakers and the last two could be bridged so there was more power for my subwoofer, a home built mono sub with a Beyma 15G400 driver.
The amplifier sounds so well that I have never made a new one. I have used it approx. 8-12 hours almost every day since I built it in 2008. We use it in my company during the day and I use it in the evenings when I do hobby things. It is not very powerful because it only runs at +/-18Vdc which gives approx. 2x15 watts for the small speakers (Electro Voice S-40) and 1x40 watts for the subwoofer, but my speakers are very sensitive so it can actually play really loud anyway. Plenty for work.
Some more pictures here.
