Elgato Wave DX on an Audient iD14 MkII: an XLR-only microphone with 600 Ω of output impedance and no published load limit
Yes. At speaking level the Wave DX needs about 52 dB, and the iD14 MkII publishes 58, so 6 dB of gain is spare. The figures come from the published spec sheets.
The Elgato Wave DX has enough preamp on the Audient iD14 MkII for a normal speaking voice. You do not have to add a box in front of it.
Elgato rates the Wave DX at -52.0 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 52 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.
Set the knob for the voice you actually record and leave a little travel for plosives, instead of pinning it because the spec sheet has a higher number. A booster on a chain that already has about 6 dB spare only adds a box. Most of those boxes also use the phantom power themselves, which will silence a condenser.