Heavy-Duty Powerhouse Pro AmplifierThe Rockville RPA9 3000-watt power amplifier combines efficiency with great sound to deliver a lightweight amplifier that packs a ton of punch. This amplifier is engineered using advanced design and components, creating a lightweight design and extremely reliable operation that can pound daily for years and years of use. The computerized IC controlled protection circuitry allows delivery of peak power while preventing overloads. The RPA9 is optimized for 4 and 8-ohm speakers, and is equipped with a stereo/mono speaker output switch allowing for quick system impedance optimization. The RPA9 amp fits perfectly into standard 19 racks, and is lightweight enough (less than 30 lbs.) to make it incredibly easy to transport.Top features.We added a built in crossover so that you can use the amplifier for subwoofers or full range speakers. When connecting subwoofers simply select the low pass. We also added a link output which will allow you to use (2) of these amplifiers together at the same time for venues that demand even more power.The other enhancement we made is that we added all the input and output terminals that ensure this amplifier is compatible with any setup. We added XLR and ¼ combo jacks and RCA inputs making this amp perfect for any mixer and any speakers on the market. For outputs, we have banana and speakon outputs plus XLR direct outputs.Mono Subwoofer-ready A stereo/mono switch on the rear of the system allows for quick configuration to use multiple speakers in stereo mode or a single subwoofer in mono mode.Power Ratings:RMS Power Output:Stereo 8 Ohm: 2 x 250W Stereo 4 Ohm: 2 x 400W Bridged 4 Ohm: 1 x 800WPeak Power Output:Stereo 8 Ohm: 2 x 1000W MaxStereo 4 Ohm: 2 x 1500W MaxBridged 4 Ohm: 1 x 3000W MaxTerminals:Input Terminals:Combo jack (XLR and ¼) A and B inputsRCA A and B InputsOutput Terminals:Banana binding post speaker outputSpeakon outputXLR direct output.