Uberwaltz, The basic circuit comes in modules. The big unit uses 20 of them to lower the signal to noise ratio requiring a much more elaborate power supply which is battery in both cases. The L20 has the lowest signal to noise ratio of any phonoamp out there by quite a margin and the little guy is better than most.
With the Channel D units you also get the option of bypassing the RIAA compensation. Then you can use their program Pure Vinyl for playback and record your albums to files. Michael Fremer uses Pure Vinyl to do this. You can add vinyl songs to your playlists and use the files to compare various remasters and such. Some people say digital RIAA correction is better than analog, less distortion and Phase shift. I have Pure Music which is part of Pure Vinyl. I think it is better for Apple users than JRiver. This program plays back any digital file and upsamples everything to 24/192. It will also do DSD. I have been debating getting one of their units.
With the Channel D units you also get the option of bypassing the RIAA compensation. Then you can use their program Pure Vinyl for playback and record your albums to files. Michael Fremer uses Pure Vinyl to do this. You can add vinyl songs to your playlists and use the files to compare various remasters and such. Some people say digital RIAA correction is better than analog, less distortion and Phase shift. I have Pure Music which is part of Pure Vinyl. I think it is better for Apple users than JRiver. This program plays back any digital file and upsamples everything to 24/192. It will also do DSD. I have been debating getting one of their units.