Singer sounds lower than ear level, help raise it

Whatever you do, don't try tilting the speakers a couple of degrees. Tilting them back a bit might actually shift the perceived center of the soundstage upwards, which would be horrible -- especially as that is exactly what you're looking for. Or, crazy of crazies, you could try tilting them forward -- which with my speakers actually seems to shift the whole soundstage about two feet upwards. Daffy, but true. But, like I said, I really don't recommend trying it, even if it does work, because it is totally not cost effective. Besides, what are you going to do if it doesn't work, just put'em back?!? That's just crazy talk.....

i thought we just need to add something under the front spikes to make the speakers' front higher.

Sounds to me as though you have the wrong amplifier paired with the speakers and the resulting performance of the speakers is not balanced. (mismatch of amplifier and speakers)

Probably wrong amplifier - speakers match. My power amps are mono 75watt class a.
Permissible input of the speakers - (Maximum) 450W/ch.
But right now i have no intention to change equipments. Need a cheap way to raise the focus point.

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