I can't answer yet, but I'm building a DIY amp using the Purifi modules and also have a JC-5. The sound signature of the Purifi is going to depend a lot on the front-end driver. The Purifi module has low input impedance (1.5K to 2.2K depending on frequency) and modest gain, so it needs some form of buffer/driver board to provide an easier load to drive.
The Purifi module itself is extremely low distortion and noise, so the front-end board will really determine the way the amp sounds. I'm planning to build/buy a few different driver boards (including one with triodes) to experiment and see what works best in my system.
The Purifi module itself is extremely low distortion and noise, so the front-end board will really determine the way the amp sounds. I'm planning to build/buy a few different driver boards (including one with triodes) to experiment and see what works best in my system.