The Heritage Audio 6673 is a redesign and "mashup" of two classic Neve console input modules, the 1066 and 1073. The original modules had three band equalizers with different frequency points and bandwidth, while the Heritage Audio 6673 takes elements from both and expands upon them, adding additional frequencies to the 1073 band, and adding a 16kHz shelf to the 10kHz and 12kHz shelves found on the 1066 and 1073, respectively. The 6673 will operate in any 80-series Neve console or rackmount frame.