do you have your speakers set up properly and a listening position that is in relationship to the speakers and the room? if you are truly new to the 2-channel audio game then you should research this area and begin there,
the reason I ask is that the tube box is a very good phono preamp and can deliver an exceptional, large sound stage that should sound much better than the internal stage on your amplifier.
the 2M black is an OK cartridge and can be beat by a good MC but I don't believe you have the flexibility in your internal phono preamp to properly load or add the appropriate gain. you should have kept the tube box.
the reason I ask is that the tube box is a very good phono preamp and can deliver an exceptional, large sound stage that should sound much better than the internal stage on your amplifier.
the 2M black is an OK cartridge and can be beat by a good MC but I don't believe you have the flexibility in your internal phono preamp to properly load or add the appropriate gain. you should have kept the tube box.