Singer sounds lower than ear level, help raise it

You don't need to tilt them much and start with nickels then two nickels......

What amp are you using? Does it have RCA and XLR input? If yes, did you compare both? I experienced similar issue in my system. My amp, I VERY STRONGLY believe, is optimized for XLR. The moment I started using XLRS, I gained soundstage width and height. Good luck!

I'm using RCA. No more budget to change interconnect. When i have budget will change the speakers to high efficient one.

Many, could even say most, speakers have a forward lobe that tilts downward. Imagine an axis where all drivers combine (sum) perfectly, most speakers that axis is not straight out but slopes down toward the floor. You can't change it without a total crossover redesign, but what you can do is raise the speakers and/or tilt them backward. Both have been suggested, and are what I'd try.

Put something about 1/2" thick under the front edge of the speaker to tilt them back, that should be around a 3* tilt, and isn't enough to change any frequency balance. But might be enough to raise that forward lobe up to ear level.

Also try putting a slab of wood under the stands, something 1-2" thick, just to raise them a bit.

Report back with your findings!