Behringer MA400 MicroMON High-power Output Monitor Headphone Amplifier Amp Behringer MA400 - MICROMON Miniature Monitor Headphone Amplifier with Microphone Input The Behringer MA400 is a unique and inexpensive personal monitoring headphone amplifier. The lightweight, minature unit allows for independent microphone and... MSRP: Was: Now: $29.99 More Info Add to Cart The item has been added Compare