Its channels can be bridged for powering higher-power applications such as a subwoofer. The 4 600 also has channel-independent high- or low-impedance output that is selectable from the rear-panel DIP switches. This allows you to integrate the amplifier into a variety of different setups. Each of its 4 channels additionally features independent attenuators with an attenuation range from 0 to -80dB. The front panel of the 4 600 provides a series of system indicators including level and signal ready clip thermal and fault alerts for quick visual monitoring of the system. The unit can be integrated into a control system for powering on and off as well as engaging its sleep mode for saving energy when not in use.