How to connect a mixer to the interm PAM-340A amplifier?

Question

Audio

Hello.
The task is the following, maybe easy for someone, but I'm not very close with audio ...
The object is a fitness club, 2 floors, on which speakers hang.
Equipment - speakers, connected to InterM PAM 340A broadcast amplifiers, 1 amplifier on the first floor (dead), the second on the second floor - now music plays from it (FM, USB)
We connect the first and second floors to one amplifier, we connect to the same amplifier 2 microphones for voice transmission - everything seems to be clear here ... But playing music from a flash drive or radio is not an option, I want a decent mixer from a computer ...
Is it possible at all to connect a mixer to it, and accordingly play music from a computer?

Answer 1

Throw in - you can. It may not even be a mixer, but some kind of audio interface, such as Skrallet Focusrite.
He will have pure silence, and not a bunch of pickups from the built-in sound system.