I dont know why you want to do that. If you enjoy building things, that is fine. But it is very difficult to build something that can better the high-end commercial products.
I was a DYIer in the 70s and 80s and I used to own an Audio Research SP6A preamp. In the good old days, the user manual of the preamp came with complete schematic and part list. So I built a few clones for my friends, each one was a little different and included what I considered improvements. But no matter what I did, none of the clones sounded as good as the original.
The reason was two words: measuring equipment. I had a cheap scope, a DIY signal generator, and a multi-meter. But in order to fine tune the amp, you need precision measuring equipment, which costs about the same as a complete high-end audio system.
I was a DYIer in the 70s and 80s and I used to own an Audio Research SP6A preamp. In the good old days, the user manual of the preamp came with complete schematic and part list. So I built a few clones for my friends, each one was a little different and included what I considered improvements. But no matter what I did, none of the clones sounded as good as the original.
The reason was two words: measuring equipment. I had a cheap scope, a DIY signal generator, and a multi-meter. But in order to fine tune the amp, you need precision measuring equipment, which costs about the same as a complete high-end audio system.