Styled in red and suitable for mastering purposes, the PQ from SPL is a parametric equalizer—specifically, it's a redesigned edition of their well-regarded Model 2050 SPL PQ Mastering Equalizer. It features stereo and dual-mono operat...

  Passive Mastering Equalizer In the PASSEQ we have revived the concept of the passive equalizer that was used in the 50’s and 60’s. The charming sound of this vintage technology combined with the modern 120V technology results in a ver...