Hey, 90 db. I've got it all set up now and it's working perfectly. Yeah, I read the user's guide but I didn't think (and this is silly) that the computer was outputting the signal it was making back through the USB cable to the Scarlett. I didn't even think that was possible (silly old school thinking about one-way directional cables).

I'm using my guitar amp as my monitor speakers but I'm going to replace them with headphones connected into the back of the Scarlett. For some reason when I use the headphone jack on the front of the Scarlett I hear my guitar but not BB.