DADGAD on a Martin D-28 through a Fishman Loudbox — DI signal too thin.

Para Acoustic DI gets close but the high end goes brittle when I dig in. Anyone running a tube preamp into a Fishman? Tried the LR Baggs Venue too, similar issue. Wondering if a Grace Felix or even just a passive tube DI would warm the upper-mids without killing the attack.