1. Api Audio 550a Diskreter 3-Band-Equalizer
  2. Api Audio 560 Grafik-Equalizer
  3. Api Audio Select Sv14 4-Band Equalizer
  4. Api Audio 565 Filter Bank
  5. Api Audio 527a Kompressor Begrenzer
  6. Api Audio 550b Diskreter 4-Band Equalizer
  7. Api Audio 2500+
  8. Api Audio 525 Diskreter Kompressor
  9. Api Audio MC531 Monitor Controller