One of my owned SUT's is the Cinemag 1254.
This has been compared to a range of other Brand SUT's and does stand out for how it projects the Upper Mid's and has a added presence in the Bass that does seem capable of producing the perception, that the bass has as a speedy roll off with not too much overhang.
It is also during comparisons a SUT that does not seem to add a influence that has a rich influence on the sound.
It is the closest to the transparency of a Head Amp, with a similar bass presence.