This was not a kit and there are no instructions. Anaview (Abletec) typically sells to manufacturers, who use these in production applications; like the Teac AX-501. The schematics are part of the PDF download. http://www.anaview.com/sites/default/files/PDS ALC0240-2300-I.pdf I used that to determine what I needed. The amplifier modules I bought from a friend, who purchased but never used them. I then source the chassis, connectors, crimp pins, volume control and other misc stuff. The only deviation from the schematic was the addition of the volume control and the switch that allows me to run them as stereo amps or mono blocks.