Radial McBoost with a Sennheiser e 835: one of its three load settings is below the microphone's published minimum
Yes. With the McBoost already in line, the Volt 4 only has to supply about 25 dB of the 55 it publishes. About 30 dB of interface gain is still unused.
The hard gain is already done. The Radial Engineering McBoost sits in front of the Universal Audio Volt 4, so the interface preamp is no longer the thing that has to rescue a quiet microphone.
Sennheiser rates the e 835 at -51.4 dBV/Pa, the voltage from a loud 94 dB tone at the grille. A speaking voice is closer to 85 dB, so the preamp still has to find about 25 dB to land near −9 dBV. That −9 dBV figure is just a tracking level: high enough to use, with space before the converter clips.
Feed the interface from the booster's output and do not stack a second microphone preamp on top. Most inline boosters spend the 48 V themselves. That is fine for a dynamic. If this microphone is a condenser, read the booster's manual before you leave it in the chain: if it does not pass phantom, the capsule goes silent.