These are basically cone-less speakers. You could try to power them out of the speaker output a Bela. The first one is 8ohm and should be just fine with a full-range audio output. The second one is 4 ohm, therefore you should avoid sending full-range audio to it from the Bela speaker output. Note that in order for the speaker amp to work, Bela needs to be powered from the barrel jack.
I don't think that the simple headphones output would be powerful enough for this application, therefore if you use Bela Mini, or if you want to use more than just 2 channels on a regular Bela, or if you want a bit more power, then you should probably use an external power amp, like this: https://www.adafruit.com/product/2130