The short answer is no. The AKG K702 headphones come with a built-in amplifier that is capable of delivering a strong signal to your ears. However, if you want to get the most out of your headphones, you should consider investing in an amp.
An amplifier will allow you to listen to your music at higher volumes and with greater clarity. It will also improve the overall sound quality of your music, making it easier for you to hear all the details in your songs.
If you are not sure whether or not you need an amplifier for your K702 headphones, we recommend checking out our full review of the AKG K702 headphones.