Re-build my PreAmp Unit, any suggestions?

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Hi, I´m thinking of rebuild my preamp unit, it was 2 years old.

Suggestions about what kind of preamplifier use in yours sound system?

What type of preamplifier used?

- voltage feedback?
- current feedback?
- low open loop gain?
- no global feedback?
- discrete or opamp?
- use buffer or only preamp?
- Output capacitor or Servo DC?
- "active" potentiometer o pasive potentiometer?
- PSU with 78XX/79XX or a diy regulator?
- Balance with 1 potentiometer or an individual potentiometer pre channel?

I want use 3 preamplifiers, Left, Righ and Left+Right (what about Left-Right?)
 
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