Vortex Sound Research

Apologies if this has been asked before, but I need determine how much power a module draws and can’t seems to figure out how that would be done.

For reference, I picked up a British Noise Electronics cascading fet amplifier and added it to my case knowing I had HP to fill. Now, as I’m planning on finally finishing up my system, I want to make sure whatever I purchase next will not over draw my psu. However that’s kind of difficult seeing as how BNE hasn’t updated the listing on Modular grid and there’s no manual either. I’ve reached out to BNE and haven’t gotten a response yet. So yeah, can anyone help me figure it out?