midrange forwardness

I think Germanboxers nailed it. Even with speakers that that have a moderate steady impedances, classic tube amps tend to be more forward in the midrange and classic ss amps tend to be withdrawn in the midrange. To be fair, most modern quality amps both ss and tube are much more neutral and similar in this regard. Never the less, adding that to that what Germanboxers already correctly explained, and it's not surprising that you might be percvieving a midrange suckout. While I tend to favor ss amps (mostly due to the speakers I tend to prefer), in your case a high quality tube amp might be the better tool for the job at hand.

I agree with Germanboxers and Unsound...and pretty much Mingles too. I didn't go with the amp switching idea, for only one reason....it's a major change, and could be very expensive.

I do have tube amps, a tube preamp, and a tube DAC in my primary system. If you are very close to being happy, with where you are now...and are only looking for some "small amount" of midrange changes...I would still start with a tube preamp.

If you are looking for something more major (and it didn't sound to me like you were)....tube amps will do that best of all.

Dave

Bigger VTL tube amps would be my rec. Their house sound is bold, gutsy with a forward and palpable midrange.

Chris - you can fix it to some degree with cables. When I read somebody's complain about pronouced lower midrange of Acoustic Zen Satori (Shotgun) speaker cables I bought them. Thats exactly what my small Icepower based amp needs. It added chestiness to male voices and my old cable sounded, in compare, very thin (AQ Indigo). Just something you can try.