Phonostage preamp HELP

All -

I just purchased a Clearaudio Innovation with a Koetsu Black cartridge. I currently have a Manley Chinook phono preamp. Give the Koetsu is rated at .4mv, I’m not getting the volume/Headroom I had previously with my Soundsmith Aida which was a high output moving iron. I love the sound of the Koetsu but I need more juice! Any recommendations would be appreciated.