Includes: KIT - 4x PRV Audio 10W650A-4 Pro Audio Woofer 650 Watts RMS Power + 1x QS3000 1Ω 1 Channel Full Range 3000 Watts Amplifier PRV Audio 10W650A-4 High fidelity meets high output — PRV Audio ALTO Series Woofers. Audio experts and professional musicians know that tone can make or break a performance, in the studio or on the stage. That’s why PRV Audio’s Alto Series woofers were carefully crafted and voiced to create a natural, smooth sound while remaining dynamic.To get the right sound, a special composite cone is built with non-pressed paper (visible on the back side) for reduced break-up and smooth sound. A unique, woven-cloth dustcap helps to achieve high sensitivity by reducing moving mass, while helping to cool the voice coil.You’ll find that Alto Series woofers work remarkably well in vented and sealed cabinets, as woofers in two-way speakers or midrange speakers in three-way systems, and even shine when used as bass guitar and guitar speakers. Upgrade to the PRV Audio ALTO Series… You’ll thank us later! HighlightsNominal Impedance: 4 OhmsRated AES Power Handling (RMS): 325 WattsProgram Power: 650 WattsSensitivity (1W/1m): 97 dBVoice Coil Diameter: 2.5″GENERAL SPECIFICATIONSNominal Diameter10″ (254 mm)Nominal impedance4 OhmsRated AES Power Handling (RMS)325 WattsProgram Power650 WattsSensitivity 2.00V at 1m97 dBRecommended Hi Pass Crossover****For Full Power Handling150 Hz****12db Per Octave CrossoverFrequency Response at -10dB75 – 5,500 HzVoice Coil Diameter2.5″ (65.5 mm)Voice Coil WireCCAWVoice Coil Winding Depth13.0 mmFormer MaterialKaptonMagnetic Gap Depth10.00 mmFrame MaterialStamped SteelPRV Audio QS3000 1 OhmQS Series amplifiers are all about efficient design capable of full-range frequency response at a great price!The QS3000 features a regulated power supply that is able to constantly deliver power and provides an unsurpassed efficiency rate of 80–90% in a small aluminum heatsink.3000 watts TRUE RMS certified at full range output Digital Class D Brazilian Technology1 Channel car audio amplifier stable at 1 Ohm gives you the benefit of wiring multiple speakers and dividing the power.Engineered to be the most efficient full range amplifier so that you can get the most out of your vehicle’s electrical system!A small footprint and compact chassis make this amplifier easy to install anywhere in the vehicle: 8.66″ Wide x 7.30″ Length x 3.00″ Height4-way protection circuitry features high voltage, low voltage, shortage, and current protection. Built-in Power/Protection/Clip LED indicators on the top panel.Channels1 ChannelRated RMS Power at 14.0 V at 1 Ohm3000 WattsRated RMS Power at 14.0 V at 2 Ohm2100 WattsThe QS Series is our most recent line of full bridge high wattage amplifiers. You can count on these amplifiers to deliver incredible value for your money. QS3000 at 1 Ohm Stable, also available at 2 Ohm.Its wide frequency response allows you to use it in many different applications, such as subwoofers, midbass, midrange, full range speakers, phenolic drivers, titanium drivers, and super tweeters, among others. This versatile amplifier is the perfect solution for daily car audio systems.Built-in HIGH and LOW pass filters allow the user to set the right frequency range for his equipment, from deep bass all the way to high frequencies.This proprietary heat dissipation design will ensure a high air flow cooling fans controls its temperature to run cool on the most demanding playlists.The LED indicator is a simple built-in tool that allows you to easily monitor the status of your amplifier while it is in use.Its clipping indicator flashes at the limit of its maximum power output without any distortion, providing excellent sound performance while giving you the best value! All are protected by four-stage intelligent protection circuitry.GENERAL SPECIFICATIONSImpedance1 OhmChannels1 ChannelRated RMS Power at 14.0 V at 1 Ohm3000 WattsRated RMS Power at 14.0 V at 2 Ohms2100 WattsAverage Efficiency76%Operating Voltage9 to 16 VoltsMusical Current Draw155 AMinimum Power Wire Input(OFC) 4 GaugeProtection Fuse or Circuit Breaker150 AmpsMinimum Speaker Wire Output14 GaugeFrequency Response(-3dB)20 – 20,000 HzMin. Input Sensitivity for Max. Output200 mVSignal Input1 Pair RCASignal to Noise>90 dBProtection SystemLow Supply Voltage / Shortage on Output / Low Impedance on OutputHeat Sink TypeHeavy Duty Cast AluminumDimensions ( W x D x H )8.66″ x 7.30″ x 3.00″Weight5.10 Lbs