Kicker KEY500.1 Manuel D'utilisation page 8

For multiple amplifier installations where distribution
blocks are used, each amplifier should have its
proper-rated fuse installed between the amplifier and
the distribution block within eighteen inches of the
block, or on the distribution block if it provides for
fusing. The primary power wire should also be fused
between the battery and distribution block, within
eighteen inches of the battery's positive terminal,
with a fuse or breaker rated at least to the sum of the
individual amplifier's fuse values, but doesn't exceed
the capacity of your wiring.
≤18"
(45cm)
external
fuse
English
external fuse
to amplifiers
power distribution
block
≤18"
(45cm)
external
fuse
≤18"
(45cm)
12V
battery
8