This amp runs at 220V and requires a step-up transformer. Amazon sells them for around $50.This wonderful and rare amp was built in Germany in the 1980s. Kitty Hawk was founded by brothers Wolfram and Gundolf Roy, who were previously the European importers of Mesa Boogie and Dumble amps during that era. While details of the circuitry remain largely unknown, it's a well-known rumor that Howard Dumble suspected Kitty Hawk of using his circuit designs, and are the reason he started to hide them with epoxy!
Although specifics are scarce, the Custom Series is widely believed to be most reminiscent of the Mesa Boogie Mark II amps from the same period. The tone is certainly distinct, offering one clean channel, a thick-sounding high-gain channel, along with a switchable boost. There is a 100w/50w switch, though the amp is always pretty loud. This amp has held up well over the years and is in good condition, showing only moderate signs of previous wear.