The Trumpet MC is a lovely stage at a bargain price. I still own mine, but really need to play with it again (too much gear). In his review, it feels like Fremer just couldn’t be bothered with such a "middle-class priced" piece of gear. He got the sonic signature right, at least - it’s definitely a "warm, big sound", like a few of us have been saying for a while. But you can certainly tweak this with endless tube-rolling combinations, which again he couldn’t be bothered with.
He made a speculative recommendation against pairing to warm cartridges, but once again he couldn’t be bothered to actually try it. For MC, he only used a Cadenza Black. Many years ago I had its predecessor Jubilee MC, and it was too dry for me. I’ve used the Trumpet MC with Benz LPS and Koetsu Coralstone, both of which are definitely warm, and they sound WONDERFUL on this stage - against Fremer’s speculative recommendation. While the result was warm (duh, lol) I didn’t feel the top-end response was too rolled off or shelved. I had Telefunkens in the 12AX7 slots for this. The LPS is particularly tough to drive with tubes, since it doesn’t pair well to SUTs. But the Hagerman did it right. Many high-end tube phono stages will fall short there.
The Trumpet’s manual writing and stock tube selection are simply not going to be as carefully procured as with a 5 or 6-figure phono stage.