Sound system talagang nilalagay ng fuse for protection (both for the system and the vehicle). Mura lang naman siya huwag lang branded ang bilhin mo. Tip ng installers is to install as close to the battery as possible.

Yung distribution block ginagamit iyon if you are running more than one amp para isa lang yung power wire from the battery, pagpasok sa block, it will get distributed.