Whoops! Clarification: The USB is technically not an input or output. As per the manual, it's described as a "USB socket" or "USB digital interface". I mixed up the names because I connect the preamp to my laptop the same way I connect to the RR2150's USB input. The NAD PP-3 has one line-level RCA "out" and three inputs…a line-level "in" and one each for moving magnet or moving coil cartridges. I've tried the moving magnet "in", but I prefer the line "in" because that way I use the RR2150's phono stage.

As I explained above, if you have the no-cost version of Vinyl Studio, you can digitize LPs and import them into iTunes raw, without any cleanup. If you opt to erase any pops and clicks, in order to save and burn the finished files you have to pay for the software. Clearer?