This Package Includes the Following Items:1 x Harmony Audio HA-A400.4 Car Stereo Alloy Amp 4 Channel 800W Fulll Range Speaker or Sub Amplifier1 x Harmony Audio HA-AK8 Car Stereo Complete 8 Gauge 900W Amp Amplifier Install Kit - Nickel2 x Harmony Audio HA-R5 Car Stereo Rhythm Series 5.25" Replacement 225W Speakers & GrillsHarmony Audio HA-A400.4 Car Stereo Alloy Amp 4 Channel 800W Fulll Range Speaker or Sub Amplifier:Specifications: Alloy Series 4 Channel Class D Full Range AmplifierPower Handling: 14.4V @ 4 Ohm Stereo 75 Watts RMS x 4 150 Watts PEAK x 414.4V @ 4 Ohm Bridged 200 Watts RMS x 2400 Watts PEAK x 214.4V @ 2 Ohm Stereo 85 Watts RMS x 4 170 Watts PEAK x 4Frequency Response: 10Hz-30kHzTurn On: DC Offset or 12V RemoteFeatures:Includes HA-EASY x 2 Speaker Wire to RCA Adapter to Simplify InstallationCompatible with both Aftermarket and Factory Source with DC Offset Feature Harmony Audio HA-R5 Car Stereo Rhythm Series 5.25" Replacement 225W Speakers & Grills:Specifications:5-1/4" Rhythm Series 2-Way Car Speaker PairPower Handling: Peak: 225 wattsRMS: 75 wattsSensitivity: 90dBFrequency Response: 45Hz-20kHzMounting Depth: 2 1/16"Mounting Cutout Diameter: 4 1/2"Tweeter Size: 1/2"Single 4 Ohm