Hi all i am after some advice i have a sony mex`2900 xplode head unit with two rca outs on the back which is switchable sub or amp i also have a 6 inch bass tube non powerd which has ordinary seaker connections halford said i could cut the rca plugs off 1 end of cable join the two inner cores and connect to the + on the tube and join the two outer cores and connect to the - terminal and plug the other end into the head unit with the plugs which i have tried but get no sound from the tube any advice would be appriciated thanks paul
