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 Buick Chevy Cadillac GMC Oldsmobile Factory Speaker Replacement Harness2 x Kicker 43DSC6504 6.5" DS Series 50W RMS 4 Ohm Coaxial Car Audio Speakers DSC65Harmony 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 Buick Chevy Cadillac GMC Oldsmobile Factory Speaker Replacement Harness:Kicker 43DSC6504 6.5" DS Series 50W RMS 4 Ohm Coaxial Car Audio Speakers DSC65:Woofers: 6.5"Midranges: n/a"Tweeters: 1/2"Impedance : 4 ohmsMax rec. Amp power: 100W PEAKMax rec. Amp power: 6-50W RMSSensitivity: 90dbFreq. Response: 40-20k hzMounting depth: 1-13/16"Mounting diameter:4-13/16"