This Package Includes the Following Items:1 x HA-A400.4 4 Channel 800W Amplifier1 x HA-AK10 10 Gauge 600W Amp Kit - Nickel3 x HA-724500 Factory Speaker Replacement Harness2 x HA-65 Rhythm Series 6.5" 300W Speakers & Grills1 x HA-R35 Rhythm Series 3.5" 90W Speakers1 x HA-826600 Aftermarket 5.25" 6.5" Speakers Adapter KitHA-A400.4 4 Channel 800W Amplifier:Specifications:Alloy Series 4 Channel Class D Full Range AmplifierPower Handling:14.4V @ 4 Ohm Stereo75 Watts RMS x 4150 Watts PEAK x 414.4V @ 4 Ohm Bridged200 Watts RMS x 2400 Watts PEAK x 214.4V @ 2 Ohm Stereo85 Watts RMS x 4170 Watts PEAK x 4Frequency Response: 10Hz-30kHzSignal to Noise Ratio: 95dB, A-weightedRCAs: InputTurn On: DC Offset or 12V RemoteRecommended External Fuse: 40ARecommended Wiring Power Gauge: 8 GaugeDimensions: 8-5/8" Width x 6-1/8" Width x 2" HeightHA-65 Rhythm Series 6.5" 300W Speakers & Grills:Specifications:6-1/2" Rhythm Series 2-Way Car Speaker PairPower Handling:Peak: 300 wattsRMS: 100 wattsSensitivity: 90dBFrequency Response: 40Hz-20kHzMounting Depth: 2 3/8"Mounting Cutout Diameter: 5 11/16"Tweeter Size: 1/2"Single 4 OhmHA-R35 Rhythm Series 3.5" 90W Speakers:Specifications:3-1/2" Rhythm Series 2-Way Car Speaker PairPower Handling:Peak: 90 wattsRMS: 30 wattsSensitivity: 88dBFrequency Response: 85Hz-20kHzMounting Depth: 1 5/8"Mounting Cutout Diameter: 3 1/16"Tweeter Size: 1/2"Single 4 Ohm