The Behringer PMP powered mixers produce even more power than their predecessors while maintaining a famously low weight and high efficiency. These mixers employ Class-D technology including a new switch-mode power supply, significantly reducing weight and heat. The 16-channel PMP550M features 5 high-quality built-in mic preamps, a Klark Teknik 24-bit Multi-FX processor, FBQ Feedback Detection, and is "wireless ready" for ULM wireless microphones.Instead of operating relatively continuously like Class AB circuits, Class-D amps switch on and off thousands of times per second delivering power only when needed. This significantly reduces power losses from the output devices given off as heat, which means the amps don't need massive heat sinks, and that makes them lighter and have no need for lengthy rest cycles. When used in conjunction with switching-mode power supplies, which don't require huge and heavy transformers, these Class-D amplifiers provide tremendous dynamic punch and superior fidelity. The resulting speaker systems are much lighter and easier to transport and set up.This model gives you 2 x 250W dual mono inputs (giving you a mono version of the main signal through one powered output plus a mono version of all monitor send signals through the second powered input). Whether the center of attention happens to be a folk trio, a speech, or an impromptu acjoustic jam at a coffee house, PMP mixers can accommodate. This sonic versatility also makes it an excellent choice for churches, where vocals and stereo recordings often share face time.Leave the mic preamps at home, because the quality of sound that was once only available in the studio is ready to go wherever you do. The PMP550M gives you 5 inputs with built-in, boutique-caliber mic preamps with switchable +48V phantom power, making it possible to use either dynamic or condenser mics. All channels have 2-band EQ and Clip LEDs to indicate when the input signal is too hot.This PMP mixers come equipped with Klark Teknik's 24-bit FX processors, giving you 100 mind-blowing digital effect presets such as delay, chorus, reverb, flange, pitch shift, and many more. Klark Teknik is one of the most prestigious British audio companies with a 40-year pedigree and a TEC Lifetime Achievement Award to back it up, so you know you're getting some of the best effects around.To top it off, the PMP2000D is "wireless-ready", meaning it can accept a USB dongle and receive up to two Behringer ULM wireless microphones. (Dongle and microphonessold separately.)Small events call for a lightweight (9.9 lbs), easy-to-use powered mixer. Behringer powered mixers are the most efficient, affordable mixers for the job, and are even suitable for use as pure analog mixers or as pure power amplifiers. With new technological advantages and incredible built-in features, it's easier than ever to lend exceptional sound quality to all kinds of public performances.FeaturesClass-D amplifier technology: enormous power, incredible sonic performance and super light-weightKLARK TEKNIK 24-bit multi-effects processorFBQ Feedback Detection system instantly reveals critical frequenciesWireless-ready for Behringer ULM digital wireless microphones (not included)5 mic/line channels with high-quality mic preamps, switchable pad and clip LEDs, plus separate Aux inputRack mount brackets includedSpecificationsInputs:Microphone Inputs: XLR, electronically balancedImpedance: 2.0 kΩ balanced, 1.0 kΩ unbalancedMono Line Inputs: 1/4" TRS connectorImpedance: approx. 20 kΩ balanced, 10 kΩ unbalancedWireless Input: USB socket accepts signals from 2 independent Behringer ULM mics (dongle and microphones sold separately)Loudspeaker Outputs: 1/4" TS connectorDSP: KLARK TEKNIKConverter: 24-bit Sigma-DeltaSampling Rate: 40 kHzMax. Output Power: 250 W + 250 WDimensions (H x W x D): 4.6" x 17.7" x 7.3"Weight: 9.9 lbs Behringer PMP550M 5-Channel, 500W Powered Mixer with Klark-Teknik Effects.