I have a pc with an MPK 249 and Hifiman He-400’s. The hifimans are the originals not the newer editions. My sound just isn’t that impressive with them and I’ve read that I may need a Dac and Amplifier or combination with them. I am very confused on which route to take and what would give me the full sound I need to produce the most balanced tracks. I am willing to spend some money but nothing too crazy. If you think I should get some other headphones that’s an option too. Thanks in advance.