Harmony Audio HA-A400.4 Car Stereo Alloy Class D Amp 4 Channel 800W Fulll Range Speaker or Sub Amplifier:14.4V @ 4 Ohm Stereo:75 Watts RMS x 4/150 Watts PEAK x 414.4V @ 4 Ohm Bridged:200 Watts RMS x 2/400 Watts PEAK x 214.4V @ 2 Ohm Stereo:85 Watts RMS x 4/170 Watts PEAK x 4Frequency Response: 10Hz-30kHzSignal to Noise Ratio: 95dB, A-weightedRCAs: InputTurn On: DC Offset or 12V RemoteDimensions: 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 43DSC4604 4"x6" DS Series 25W RMS 4 Ohm Coaxial Car Audio Speakers DSC46:Woofers:4x6"Tweeters:1/2"Impedance:4 ohmsMax rec. Amp power:50W PEAK/6-25W RMSSensitivity:88dbFreq. Response:50-20k hzMounting depth:1-7/8"Mounting diameter:4x6"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