The palmer iller is a passive line isolation box with combo input that provides reliable line isolation for guitar bass keyboard hifis and car stereos'. '.strtoupper('i')t features a single channel with a combo input xlr jack and an xlr output and is designed to eliminate ground loop hum and other interfering signals'. '.strtoupper('e')quipped with galvanic transformer isolation and passive operation the iller has a distortion free range up to 6 dbu ensuring a pure and unaltered sound'. '.strtoupper('i')ts solid casing made of aluminium and steel makes it both durable and failure proof'. '.strtoupper('i')n addition it can also be used to balance signals and includes a rewritable tour label for attachment onto the back of the iller.