Native Instruments Power Supply 40W

This is the official NI power supply that's guaranteed to work for all of their DJ controllers (their smaller controllers come with power supplies that do not have enough amperes for the bigger controllers, so they're not all the same.)

Good quality, pretty packaging, choice of heads for when playing on different continents, but the price is a pretty penny. You can find a supply with the same specs and with roughly the same quality for ~50% less.