The nanoo is a compact (read small) amp using two LM3875 chip amps for full stereo delivery. I included two attenuators to help keep Xtalk down and to allow balancing between speakers. Also for the looks. I intended this amp to look like some small audio creature and I think I succeeded. Though diminutive in size at can be played quite loud. Because cooling is provided mainly by the sides of the case, with the larger heart sink on top only assisting with cooling, if you play it too hard the over-temp control cuts in and cuts the sound. If you play a cool jazz CD though it you can play it quite loud. It can deliver 100W bursts.
The PS is separate and is joined to the nanoo via a power umbilical cord. The PS employs an internal toroidal tranni, UF diodes and two 4.7uf polys for filtering. The connectors are RS232 male and female plugs. The line caps in the nanoo are 5,600uf quality electrolytics. There are no coupling caps - input or output.
The sound is clear, good bass, mids and treble but the mono blocks are a couple of classes better. Working in tiny spaces is frustrating and it took over an hour of fiddling to get all the parts in the nanoo and the chips snugly bolted to the sides of the case. Point-to-point wiring was used and silver wire on the input. Follow this link for more info:- diyaudioprojects
The PS is separate and is joined to the nanoo via a power umbilical cord. The PS employs an internal toroidal tranni, UF diodes and two 4.7uf polys for filtering. The connectors are RS232 male and female plugs. The line caps in the nanoo are 5,600uf quality electrolytics. There are no coupling caps - input or output.
The sound is clear, good bass, mids and treble but the mono blocks are a couple of classes better. Working in tiny spaces is frustrating and it took over an hour of fiddling to get all the parts in the nanoo and the chips snugly bolted to the sides of the case. Point-to-point wiring was used and silver wire on the input. Follow this link for more info:- diyaudioprojects
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