LDA NEO Extension 4250 is an extension controller and a 4x500W amplifier or 2x1000W amplifier for the compact EN 54-16 PA/VA system NEO. 4 amplifiers of 500W or 2 amplifiers of 1000W for 100V/70V lines. 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 32 attenuators LDA AT6. Integrated frontal loudspeaker for monitoring. 12 supervised contact relays for integration with Fire Alarm Control Panel.