it distributes power or ground to multiple amps. they can also have fuses built in. i had 2 one for ground and one for power.
pedro, didn't see your d-block.. what kind are you using and how much did you pay for it? They go for about $30 here ($60 with a digital readout). are you using a 4ga d-block?
it was in the rear storage compartment. out of site. it cost me 30. three 4 gauge in (depending on placement) 4 8 guage out. with 4 fuse slots.
