FWIT I run a Rogue RP-1 into an older Firebottle SEP feeding Zu Omens. Schiit Yiggy , Thorens TT and MF transport up front. I have about 15 pairs of power tubes and 6-7 rectifier tubes for the Inspire. The Rogue pairs well with the SEP. I have about 10 sets of various NOS 12AU7’s for the Rogue. I prefer Telefunkens as they really help the Rogue open up. I also run an upgraded power cord and isolation footers. The phono section in the Rogue is lacking and the headphone section sucks. I rotate a 50 wpc SS amp when I play vinyl. I have a Grado Prestige cartridge and it’s not a good match with the Rogue. I hope that can lend some insight to your 300b question. I’ve emailed a few times with Dennis and he’s given me solid advice. He’s about musical enjoyment at a modest price. Regards , Mike B.