I don't understand about why people remove the HPF in a microphone like a U67.
I would think you would want a HPF in the range of 20Hz to 40Hz if you don't have a treated room.
I would think it is better to remove the low frequency rumble etc. before sending it to a preamp. Less junk to cause IM distortion.
I have added a 12dB HPF at about 30Hz in microphones and on the list of things to build is one with a 4th order HPF at about 20Hz.
I would think you would want a HPF in the range of 20Hz to 40Hz if you don't have a treated room.
I would think it is better to remove the low frequency rumble etc. before sending it to a preamp. Less junk to cause IM distortion.
I have added a 12dB HPF at about 30Hz in microphones and on the list of things to build is one with a 4th order HPF at about 20Hz.