Designed to Samson's strict performance standards, the S4000 is the ideal board for any venue that demands high-quality audio. The S4000 offers 1,000 watts of power (500 watts per side) at 4 ohms with a total of 20 input channels, including 12 mono channels with high-quality mic preamps and line inputs, as well as four stereo channels. It also features a dual 24-bit effects processor with 100 preset parameters and FX level controls, as well as a built-in MP3 player/recorder for streaming your music files through your sound system or recording your mix via a USB flash drive. Precise sound control on the S4000 is enabled through each mono channel's low and high frequency EQ knobs, and advanced mid-frequency sweep and Cut/Boost with variable knobs. Further customization of your overall output is provided with a 9-band graphic EQ available on both the monitor and master output sections. Additional S4000 features include four Aux sends (1 Pre, 1 Pre/Post, 2 Effects) on each channel, onboard phantom power for integrating condenser microphones and Mute and Low Pass Filter buttons on all mono channels. The mixer also provides advanced monitoring in the form of 12-segment stereo LED level meters, 1/4 '' headphone and Speakon outputs, as well as a Mono Sub output with variable low-pass filter. Lastly, the S4000 comes with a protective cover with locking latches for maximum durability. - Dimensions: 29 x 76 x 64 cm.