4 class D amplifiers of 500W at 4 Ohms. 4 pre-amp outputs for external PA amplifiers connection. DSP: 7-band input/output Parametric Equalizer, loudness, LDA sound enhancer, independent volume control per each output channel and audio filters. Triple Ethernet port: for Digital Audio Cobranet, remote control and supervision, and for escalating the system with NEO-Extensions in daisy-chain mode with Flexnet techlogy (up to 1024 zones). Control for up to 16 attenuators LDA AT6. 6 supervised contact relays for integration with Fire Alarm Control Panel.