Fiio i1 apple lightning amplifier the fiio i1 is an apple mfi certified digital to analog converter dac and headphone amplifier designed for the lightning connector the digital audio signal enters through the lightning connector end that can be connected to the apple iphoneipodipad and other apple products while the analog audio signals are pushed out through the 35mm output the i1 also automatically detects if you are using a standard headphone or one with in line controls just becaus