I assume the Rom was the Sig version, but I honestly didn't even look. Since falling in love with the Ayre components in the last year, I've gotten away from tubes as I don't like rolling them. I spend way too much time listening to music, both recorded and live. I can't just get to my components anymore as I have MS and it isn't fun gettign on the floor anymore....This is what makes audio so much fun...there is something for all of us. I love the sound of the AR gear as well as the Aesthetix gear. I'm still liking an all Ayre system for what it does in the midbass and bass. Again, that's just me, but they are all awesome components.