Maybe my room & set up kills a lot of the critical high frequency info leaving nothing but the mid-range, how to fix this?I have found by listening to test tones that there is a range of frequencies in the mid to upper treble which is perceived as coming from a point considerably above the height of its actual source. I don't recall the numbers exactly, but I think it roughly encompasses the 6 to 10 kHz area, which would affect female voice significantly.
So if those frequencies are being reproduced too weakly at the listening position, it would have the effect you are describing.
Possible causes of weak reproduction of those frequencies:
1)Listening at particularly low volume levels, as a result of the Fletcher-Munson Effect. If that seems like a possibility, turn up the volume and see what happens!
2)Dead tweeters. Are you sure they're working?
3)Room acoustics, as you indicated. Hard to say how to fix without knowing a lot of detail about the room.
4)A mismatch between amplifier output impedance and the speaker's variation of impedance as a function of frequency. I doubt that is the problem here, but can you indicate the specific amplifier model, and whether it is tube or solid state?
5)Improper phono cartridge loading, if you are using a vinyl source. If you are using a moving magnet cartridge, load capacitance in particular.
6)Listening off axis or with improper toe-in, as was pointed out.
I doubt that the low power rating of your amp, relative to the rated permissible input of the speakers, is a factor, unless it is preventing you from using reasonable volume levels (which seems doubtful for female voice).
Regards,
-- Al