# Black Box Analog Design HG-2 ## Tips and tricks This is a parallel topology: two 12AX7 tubes [Black Box HG-2 Tutorial with Protoculture | Plugin Alliance - YouTube](https://www.youtube.com/watch?v=E0wBB8TiCpg) Wytse says triodes sound warmer, pentodes sound rougher.[^1] ## CPU ## Oversampling IR Has some pre-ringing ![[black box ir.png]] ## Sine sweep test at -18, spectrograph readings at -130dB, OS on Pentode 50%, triode 50% ![[black box pentode 50 triode 50.png]] Pentode 50%, triode 100% ![[black box pentode 50 triode 100.png]] Pentode 100%, triode 50% ![[black box pentode 100 triode 50.png]] Pentode 100%, triode 100% ![[black box pentode 100 triode 100.png]] ## Hammerstein test [^1]: [IT'S GREAT BUT IMPOSSIBLE TO USE! || Black Box Analog Design HG2 - YouTube](https://www.youtube.com/watch?v=NsrAJ2A-r-k)