Small part, big impact ... At first I was skeptical, many cables, small woofer ... Whether what is ??? But it was, I can as headings at all. Reviews only connect, Although it looks small, but has enough juice. What is recommended, however, you bought a decent harness to .... Chinch - Harness 25mm2 enough in any case, even if you even want to install something stronger, so you have to then not again pull cable ... submit chinch cable plus blue wire and the power, we got us the power of the rear power socket and the still simplified , cigarette lighter plug bought in the next hardware store, + and - connected in the connector and into the box ... Woofer is protected by a 7.5A, cigarette lighter plug with 8A and the box itself with 30A Thus, since nothing go wrong ... In conjunction with a Sony GTX with woofer ... Installed is all in a Skoda Octavia Combi and I can say ... not without my woofer ... Top product for small money