"Everything is made together the caps and resistors and the toroid share soldered connections between them (acting as one unit if you like), and two wires in and two wires out. Could each driver take what it needs from this? It sounds very good at the mo, I have the tweeter positive connected to one wire and the lowther positive connected to the other... then all the negatives connected direct to the binding post."

Sorry Chris just read this, and it doesn't sound right. From what i know, the red and blues should never be connected together. The reds should connect either end of the inductor and the blues either end of the caps/resistors.

You said you soldered these yourself..

Are you SURE they were wired exactly in this way before?

It sounds like you're sending an identical signal to both the lowther and tweeter and that's not right..