"Vamp" wrote in message
...
in built amp i think and when plugged in using a splitter he gets nothing,
i'm just going by what my
mate has told me, haven't been to see it yet.


Your mate would appear to be doing something wrong then. Normally with a
single sub out lead running to an amp (be it separate or built into sub) one
would either use a Y splitter to feed both L+R RCA's on the amp, or on more
upmarket amps you would plug your single lead into the L terminal and have
a switch which sums the signal from the L RCA and adds it to the R and works
that way.

Tim..