Parenthetically, it looks like the PH-1 has changed slightly over the years. The version I built has a selector knob at the front that allows the user to select 1K, 22K, 47K or 68K loading. The current version appears to omit the selector switch and provides 47K loading only. Wiring up that switch was the hardest part of the kit (at least for these fat fingers), and I suspect that was the reason it was eliminated. That said, I'm very lazy and have generally left the loading at 47K and have never done careful listening tests for differences among the different positions.

Unfortunately, I have not heard Doc's Seduction, so I can't compare the two units. All I can tell you is that I've been very happy with my PH-1. Most of my albums are 25 to 35 years old, bought when I was listening to rock of the Jimi-Janis-Cream-FZ variety in high school and college. Luckily, I always treated them with care, and they sound a hell of a lot better now than they did back then!