I purchased this item used. It's a rare NF-type phono equalizer from Goken Lab. I've used their LCR-type model in the past, but I felt the NF-type had a more forward sound (this is just my subjective impression). It can be used with MC cartridges like the DENON DL-103 with gain switching, and in my setup, I was able to play the DL-103 and Audio-Technica AT-32E without any noise. I'm selling it because I'm changing equipment.