"Vamp" wrote in message
...
for a friend really. mate has a new head unit with a sub out but the head
unit sub out is a single
RCA but his sub is a double? he tried a splitter but that didn't work, is
there a special way to
wire it up?

Sounds like the blind leading the blind, take the car to a specialist or
wait for some other to answer your post, you wouldn't like my real reply....