No, really, you can stop with the joking now. I've heard R10's. They don't even have bass potential. And to compare it to the L3000? Dude, that's the bass reference.
Tell me what tubes you are using, please. Hirsch has a balanced R10 and a SDS XLR, and he probably has that particular tube compliment -- if he does, I will take a listen for myself. And you will laugh, "ha! He fell for it. He actually thought that a R10 could have bass!"
PS I got my Rotrings. They have little red circles on them. Other than that, they're all black.