Hi, If my laptop doesn't have a working headphone port, would I be able to plug this headphone amp into a usb port and plug my headphones into that? Or do I still need a functioning headphone port?
yes. E17 is a DAC/amp. The function of DAC is to convert digital signal to analog format bypassing the onboard soundcard of the computer/laptop.
you can plug the headphone to E17 and listen music