Yeah. It seems to be a good value.
I like the simplicity of both the Crack and the Darkvoice.
Correct me if I'm wrong here, but I think these are basically iterations of the
Aren van Waarde project (itself based on an older Rudy van Stratum schematic).
A basic topology of 2 double triodes with a 6922 (or an Octal) for input stage and a 6AS7G as a CF.
Simple as can be, no feedback, single-ended stuff.
Power supply follows suit.
So, i guess simplicity does the trick in this case and when built with quality parts, this design can really sing.
Actually, I just finished a project using a relevant PCB that found online.
Didn't want to go all out with point to point soldering so I ended up adapting it a bit to my modifications following the same proposition.
I have to say that my experience so far with this basic, no-frills design is very positive.
Compared with my other DIY tube amp with somewhat similar design but an SRPP for signal stage I think this one takes the cake.
Here it is waiting to be finalised.
Crucial points soundwise are mainly the capacitor bank in series to the output and the power supply (both filaments and anode power).
As usual problem with any kind of mods, the problem is fitting them in a tight space when you have to use a certain enclosure.