ProtoDAC TDA1387 X8 project

[hifinet]

The K295 circuit doesn't look like a buffer preamp. It is a common cathode configuration, which is a triode gain stage. This preamp is inverting (no need to digitally perform polarity inversion with ProtoDAC). The interesting thing about the 6418 is that it can run on batteries. It is also a directly heated cathode. Apparently it was used in hearing aids and other portable electronics. Pentodes can make very good sounding triodes. I was not familiar with this tube. If it doesn't sound like it is adding a "tube sound", that seems like a good thing to me. Thank you for sharing.