HI! I need help to know if I can transform my power bank into a kind of AC plug for my speakers.

I have this type of power bank, which should be above the average power of standard power banks.

With the help of this car socket adapter. and an inverter for such cars like this. I should be able to transform my USB power bank into an AC socket that can be used by my Bluetooth speakers. the problem is understanding whether the power given by the powerbank is enough to send the necessary current to the speakers. Then I wonder if there is some kind of power loss with the adapters I linked.

Ik it's ideale in any way, but i really can't afford a generator, and i was thinking this could do the trick, even for just 2 hours.