Optimizing Magnepan MMGW On Wall Speakers

Hello,

I've got a pair of Maggie MMGW Onwalls that I installed in my bedroom for nighttime listening.

They give me a bit of that nice transparent Maggie sound, but my problem is that they sound very hollow throughout the upper bass and lower midrange, say the 100-1000hz range. I wasn't expect these to have the dynamic impact of Watt Puppies or anything, but basically I'm getting a really thin sound out of them.

I have a REL Strata that is crossed over near their natural rolloff at around 100hz, so low-bass is not a problem.

Does anyone have experience with the Maggie On wall speakers? Is there anything I can do to flesh out the lower midrange and get the sound a bit punchier in the mid bass, and just a bit more warm overall? For bedroom listening I'd strongly prefer to err on the warm side instead of the thin and bright side.

I've experimented with opening them up at different angles at all, but the overall very thin sound is persistent.

Thanks in advance!