They say LM1875 is the low-power version of famous LM3875 (which is the heart of Gaincard power amplifier). Someone say, the sound is very good, and very alike tube-amplifier. I am not good at listening, so I am not sure if they are right or wrong. But still, I like this one.
The first purpose of making this one is kinda odd: use it as head-amp. Hmm, this IC is just like an opamp but it can provide good power for loud speaker. To use with head-phone I guess I need to reduce the gain to 3 or 5 and use lower voltage (dual 12v), and some other tweak. But I think I will save that for another day.
Schema from datasheet (I ripped some filter out of schema)
PDF file for printing:[attach=att/LM1875_pcb.pdf]LM1875_pcb.pdf[/attach]
This one can be use with the simple dual power supply.
Put in a box:
[tag]LM1875[/tag]
