If there were to be 3 frequency points to offer above and beyond what other companies offer with HPF...
The frequency points should achieve
-Rumble Elimination
-Low Frequency taming
added together or a 3 option
-Low/Low-Mid Frequency "removal", ie high frequency emphasis
Personally, I'd been looking for Remote Control Pre-Amp interface, and HPF was a requirement. Ended up nabbing a Focusrite MP8R for a good used deal from my local dealer.
- Rupert Neve Designs RMP-D8 8-channel Microphone Preamp - HPF@80,
- Neve 1073OPX 8-channel - HPF@80, Impedance switch, separate Line Inputs+Switch
- Ferdenstein 2 channel Commander (no digital) - HPF@39+82, Impedance Tri-Toggle
- Focusrite MP8r - HPF@65, Impedance 10k½ or 2.4k½
It really doesn't make sense to not include a HPF especially of the pres are going straight to digital.