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  1. Photos of PGA2310 experiments
  2. STEREO 3band eq. LİNE or MİC İNPUTABLE PREAMP
  3. Stereo 2band active corrector with 24dB active subwoofer filter.
  4. Subwoofer processor i need
  5. Loudness control - circuit!
  6. High-End tube preamplifier with ECC82 or ACC88!?
  7. PGA2311 Digitally controlled pre-amp
  8. Preamp Power Supply
  9. Phantom Power Test
  10. Cathode follower or buffer with 12ax7
  11. Can someone assist me with input balance circuit?
  12. Preamp noise