I am interested in knowing where the NFB 12 differs from the FUN as well. My roommate has a FUN with all of the different opamps and we have mostly used the Moon opamp much to our delight. I really like it, but I want to get something different. I currently have a Maverick D1 that I bought used but I believe it is faulty. There seems to be a lot of clipping and some of the inputs lose signal.
How long will the NFB12 promo be going? I would like to order it today or tomorrow.