Low output from B&O RX2 2/ SMMC4 Cartridge

Hello all,

Quick question:

But background first, I recently picked up an RX2 and a new SMMC4 cartridge. Everything has been tuned up and hooked up and plays. I'm using the phono stage built into my modern Onkyo receiver rather than a separate pre-amp, and that is my preference for simplicities sake (for others in the home who may be using it). The one issue that I have is the output. When I turn the volume to Max on the receiver, the output is what I would call "mildly moderate." It is by no means loud and there's a lot of room before it would become "unreasonably loud" or even just "loud."

I assume that this is because the cartridge output is ~ 2.2mV and the receiver is expecting something closer to that of an MC level around 5mV. 

My question: Would an MC to MM set up transformer be my best course to bring the level up? I ask because I'm seeing that the suts look like they're expecting a lower input than something around 2.2mV.

Any thoughts?

Thanks,
Andy