"If it is pair with this amp, how loud do u think I can expect?"

If you listen to compressed music, you can crank the TEAC and from 6 feet away you'll go deaf.

If you listen to well-engineered music, you could get away with listening at 0.5W nominal and that gives you about 16dB of headroom. That will result in 85dB, nominal, from 6 feet away.

House of the Rising Sone
Out in the mid or far field
Dedicated mid-woofers are over-rated