Yes. For the vast majority of listeners, you will definitely need an amp to use these speakers. If you are primarily listening at moderate volumes or lower, there is no need for an amp. But if you want to fill larger spaces, crank up the volume now and then, or listen to music with deep bass content then I highly recommend that you invest in a good quality amplifier that matches well with your Leckerton UHA-6S DAC’s headphone output impedance of 4 ohms.