Plug-n-play audio system includes: HARMAN Kappa Perfect KP5004 4-channel amplifier Pair HARMAN Infinity Kappa Perfect 600X 6.5” speakers Pair HARMAN Infinity Kappa Perfect 900X 6“x9” cut-in saddlebag speakers Pre-tuned Saddle Tramp DSP Interface Saddle Tramp vehicle-specific amp installation kit Vehicle-specific Saddle Tramp audio harnesses, including backbone speaker harness Saddle Tramp Street Glide amp bracket Saddle Tramp Road Glide amp bracket Saddle Tramp OE amplifier bypass harness HARMAN Kappa Perfect KP5004 amplifier: Max power: 1250W peak RMS power output @ 2 ohms (full-range): 125W x 4, 75dB (ref 1W output @ 4 ohms) Fuse rating: 40 amps Dimensions: 200mm x 85mm x 45mm All wires terminated with Molex or Molex-style connectors HARMAN Infinity Kappa Perfect 600X 6.5” speakers: Power handling: 80W RMS, 240W peak Sensitivity (@ 2.83V): 95dB Frequency response: 60Hz – 20kHz Impedance: 3.0 ohms Basalt fiber woofer with Plus One technology 1” edge-driven polyphenylene sulfide-dome tweeter Removable tweeter design for component configuration IPX5-rated speaker front, weather-resistant speaker back side HARMAN Infinity Kappa Perfect 900X 6“x9” speakers; Power handling: 100W RMS, 300W peak Sensitivity (@ 2.83V): 95dB Frequency response: 50Hz – 20kHz Impedance: 3.0 ohms Basalt fiber woofer with Plus One technology 1” edge-driven polyphenylene sulfide-dome tweeter Removable tweeter design for component configuration IPX5-rated speaker front, weather-resistant speaker back side