Easy assembly. The polarity of the cables is indicated on the back of the box. There are level controls on the converter housing. Turn them all the way up and use the gain control on the amp to adjust the levels. I attached mine to the head unit behind the dash as there was plenty of room for that. I have speakers in the door so taping wires from the speakers is not an option. That's a great price for a foosball product. You will not be disappointed.
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