Power source ac or dc in speaker means?

[alokoox]

I have tpa3116d2 d class amplifier what kind or what type speaker I'm select bk ali express speakers discrpetion
speaker power source==? (Which I'm select (

 

[americanaudiophile]

Information on the power supply for that chip is here
http://www.ti.com/product/TPA3116D2/technicaldocuments
Voltage can be from 4.5v to 26 volts dc. That will affect the amount of power it puts out into the speaker. You may also have to heat sink the chip.
Maximum power output to the speakers seems to be 2x 50 into 4 ohms or 2x25 into ohms with a 21v power supply.
If you use 4 ohm speakers that would get you twice the power output but the chip might run hotter.