Harmony Audio HA-A400.4 Car Stereo Alloy Amp 4 Channel 800W Fulll Range Speaker or Sub Amplifier:Alloy Series 4 Channel Class D Full Range AmplifierPower Handling: 14.4V @ 4 Ohm Stereo 75 Watts RMS x 4150 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 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" HeightHigh Level Input Sensitivity: 2.5V - 40VLow Level Input Sensitivity: 90mV - 10VGain: (Knob Variable)Low Pass Filter: 50Hz - 500Hz (Knob Variable)High Pass Filter: 50Hz - 2kHz (Knob Variable)Bass Boost: 0dB - 12dB @ 50Hz (Knob Variable)Includes HA-EASY x 2 Speaker Wire to RCA AdapterKicker 43DSC504 5.25" DS Series 35W RMS 4 Ohm Coaxial Car Audio Speakers DSC5:Woofers: 5-1/4"Tweeters: 1/2"Impedance : 4 ohmsMax rec. Amp power: 70W PEAK/6-35W RMSSensitivity: 90dbFreq. Response: 45-20k hzMounting depth: 1-7/8"Mounting diameter: 4-1/2"Kicker 43DSC69304 6"x9" DS Series 70W RMS 3 Way 4-Ohm Coaxial Car Audio Speakers DSC693:Woofers: 6x9"Midranges: 2"Tweeters: 1/2"Impedance : 4 ohmsMax rec. Amp power: 140W PEAK/6-70W RMSSensitivity: 92dbFreq. Response: 30-20k hzMounting depth: 3-1/4"Mounting diameter:5-5/8 x 8-7/16"Includes Harmony Audio HA-AK8 Amplifier Install Kit and Speaker Replacement Harness