The Q99 from Electro-Voice is an amplifier that is designed to provide superior sound reproduction. It is compatible with various mobile and club sound systems such as ZX, TourX, and Phoenix loudspeaker families. This system features two cooling fans that prevent overheating. The integrated low-pass notch filter provides a high acoustic output by correcting the phase and frequency response of the interfaced speakers. This system exhibits balanced XLE inputs and outputs. The Q99 has been designed to be installed in a 19" rack unit with a rack unit of 3.5". This system incorporates specialised circuitry to prevent inrush current, short circuit, and overload.