The Federal AM864 Compressor Limiter is a classic piece of equipment from the 1950s, known for its high-quality sound processing capabilities. It is a sought-after item for musicians and engineers looking to add a touch of vintage charm to their sound. This compressor/limiter is a versatile tool for controlling dynamics and achieving a smooth, polished audio output, making it a must-have for professionals in the music industry. This item has been used in a professional studio and has recently been looked over by the studio in house technician and has been updated with proper XLR input and output and variable release and attenuator.