To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyses reviews to verify trustworthiness.
The seller is misrepresenting this product by describing how to set the jumpers according to the newer version in the "Product Description" A B C D, yet shows how to set the jumpers in the "Product Photos" of a different board. Beware..
This little crossover worked great. Used it to wire up a house PA system in a movie theater. Some of the crossover frequencies markings on the circuit board where Chinese symbols but with a little experimenting I found the right crossover points.