AMP 4x500 is a 4 channel stereo power amplifier giving a choice to drive 8Ω, 4Ω, and 2Ω speakers. Containing Balanced XLR input and Speakon output connectors. These compact and lightweight 1U-sized body amplifiers contain a switch-mode power supply, intelligent audio limiter, protection circuitry, variable-speed fan. The bridge mode is available. It is a great choice to use in live sound systems like nightclubs and discos.