kieran5800"Need," no. Would they benefit from one? Yes. If you get an K7XX, I recommend you run it off whatever you have first (phone, laptop) to see how they sound to you. If you don't like how they sound after some listening time or are curious about a DAC/Amp, here are a few decent, budget options you can research: CEntrance DACport Slim (also sold on MassDrop), Schiit Fulla, Micca Origen, O2, Schiit Magni. I've used and recommend the DACport Slim with these.