The Pure Preamplifier Thread

Hi

I have so far not found a specific thread that discusses Preamplifier circuits so i thought i might make one for SS pre-amps to get tip's about schematics, PCP's components and discussions how and why.
This is more of a general thread so RIIA amps are welcome but not the main topic.
I know that most products now comes with build in pre-amps but this is for those that want to build their own stuff and needs a pre-amp to go with it DIY CD,DAC,LP and other equipment. and i want alternatives and to get my hands on something really nice like we all want.


The Simple Rules
  1. this it NOT a SS vs Tube vs D-amp thread, everyone has their own tastes and here its SS. this also includes OPA flavours and other components
  2. Be nice, not everyone knows everything so don't ride in on a high horse.
  3. Sharing leads to progress, if you know help others understand.
  4. If possible, components that are still manufactured. No one wants to have to buy a 50$ out of production transistor from a dodgy seller.
  5. I have OCD and a list with only 4 points made me uneasy and i like the number 5.