The amplifier to go with my computer speakers. It uses pairs of TDA2040s in bridge formation, one for each main driver. A final single chip then runs each of the two front tweeters, driving the speakers in full bi-wired mode. The crossover for the front amps is built into the same box; an active circuit using a standard op-amp chip (as I sit and type this page I forget which one exactly... it's not important). The whole thing is then powered by a split +/-12V power supply, also built by me, in a separate box. (This allows me to experiment on the amp itself at safe voltage without exposing the mains-inlet side).