Extend Your Audio. The ARRI Audio Extension Module AEM-1 mounts onto the back of your ALEXA 35 cinema camera and is designed to add mic and line audio inputs with internal electronic controls. The module features two balanced mini-XLR inputs with 48V phantom power, a low-cut filter, and level control. It also features an additional mini-XLR input with AES3/AES42 support with phase reversal and level control. A 3.5mm line/headphone jack with amplifier allows you to monitor and output the audio inputs. The module also features a 12V 2-pin LEMO and a 24V RS power output to provide power and run/stop to accessories.