The amazing PMP550M Powered Mixer packs tremendous power (2 x 250 Watts dual mono), while maintaining an incredible power-to- weight ratio. These mixers employ high-efficiency Class-D technology and a state-of-the-art switch-mode power supply, which significantly reduces weight and heat. The 5-channel PMP550M features 5 high-quality mic preamps (2 of which also accept our ULM Digital Wireless Microphones, available separately) and a 1⁄8" Aux Input for playing music from your smart devices. For that extra professional touch, we added a KLARK TEKNIK 24-bit Multi-FX processor with 25 presets including studio- class reverbs, delays, pitch shifter and various multi-effects, plus a 7-band stereo graphic EQ with our proprietary FBQ Feedback Detection System – for the ultimate in feedback-free performance. Thanks to our revolutionary Class-D amplifier technology, we are able to provide you with enormous power and incredible sonic performance in an easy-to-use, ultra-portable and lightweight package. Class-D amplification makes all the difference, offering the ultimate in energy efficiency – and eliminating the need for heavy power supplies and massive heat sinks. This amazing technology makes it possible to design and build extremely-powerful products that are significantly lighter in weight than their traditional counterparts, while using less energy and protecting the environment.