Compact at just 1 rack unit, the QX range of amplifiers are available in single, dual or quad channel models and are the perfect partner to your Quest MX installation. Delivering high quality in both low impedance and 70/100V line modes, the QX range is highly flexible. They are also among the greenest power amplifiers available, running at close to 90% efficiency. A switchable automatic standby mode puts the amplifier to sleep if no signal is detected for more than 30 minutes. As soon as input signal is sensed, the QX amp comes back to life. No more worry about forgetting to turn the amplifiers on and off each day. Selectable high pass filters and built in limiters are featured on each channel, and the QX series keeps its cool with thermally controlled fans.