Kemo M034N 40 Watt Universal Mono Amplifier Module

How do I match the 4 to 8 0hm output impedance of the Kemo amplifier to the input impedance of 8 piezo speakers connected in parallel?

Can this module be hooked up to the ultrasound generator module sold by the Kemo? That is, what is the input frequency range for this product?

What is the khz rang of the kemp m034n 40 watt universal mono amplifire?

Can i connect one 75 watts 8ohm piezo horn speaker to the output with m048n as input?