I am looking for a hardware to plug-in the headphones (Beyerdynamic DT770 PRO 250 Ohm).

1. What is the difference between DAC, Sound Card and AMP?

I'm wondering about clear difference between these 3 kind of hardware items. And is there anything combined into 1 ?

2. Also what will be the difference between built-in sound card (Macbook pro) and some external usb\thunderbolt sound card (Audio interface)?

I am looking for a hardware to plug-in the headphones (Beyerdynamic DT770 PRO 250 Ohm).

1. What is the difference between DAC, Sound Card and AMP?

I'm wondering about clear difference between these 3 kind of hardware items. And is there anything combined into 1 ?

2. Also what will be the difference between built-in sound card (Macbook pro) and some external usb\thunderbolt sound card (Audio interface) while working with any sequencer?