You might also try changing the tubes in your Freya+.
I found that a combination of Ken-Rad VT231’s in the gain stage and 5692’s in the buffer stage (RCA or CBS Hytron) to have the most solid bass. For a more budget friendly alternative, get Sylvania 6SN7 GTB’s from the 1960’s (about $35 each from Brent Jessee) and you might find that your high end is now airy without being so bright. BTW, any Martin Logans I’ve ever auditioned have been bright to my ears. But don’t discount the tubes in your preamp, especially if they are new production. They can sound hard.