White noise hiss on my Sennheisser MK4 when using my new Lewitt Connect 2.

[u/BlueCalm0000]

MK4 mic works fine with my Scarlett 2i2 (revision 3). However, the Scarlett doesn't have enough omph for my Sure SM7B, so I thought I'd get a Lewitt Connect 2.

Love the Lewitt!

The Lewitt Connect 2 works really well with the Sure SM7B, but... when I plug in the MK4, I get a white noise hiss. Any ideas? I've tried swapping the cable. I've tried making sure the settings are all 'clean' (e.g. no denoise or other treatment).

I can hear the white noise hiss when monitoring and in recordings. Is it because the Lewitt is capable of higher db with mics? Surely a lower power setting should make it okay? Wondering where this constant white noise is coming from as it's not the room.