4 Channels x 400W + DSP and Dante Amplified Loudspeaker ControllersALCs provide all of the signal routing zone switching DSP processing protective limiting remote monitoring and amplification functions needed between a mixer and the loudspeakers in virtually any Community Professional Loudspeakers application. Standard Ethernet communication protocols allow for fast system design system control and remote system monitoring. Analog and Dante? inputs are included in each model for quick and easy integration into any new or existing system. Community-authored loudspeaker presets include equalization high pass filters and multi-stage limiters tailored to each model ensuring consistent sound quality and full loudspeaker protection in every application. In-depth control and monitoring is accomplished via Armon?aPlus System Manager Software. Tailoring the sound and managing the system can be done at a remote decentralized location. The ALC-404D can also be trusted in mission critical applications such as fire alarm systems thanks to the cleverly engineered power supply that allows reliable operation even when connected to a UPS in addition to the per-channel user-assignable fault-indicating GPIO connectors on the rear panel.