Zobel for high capacitance cable

Hi
I need to add a zobel network for use with my high capacitance speaker cable .
Running Linn ninka.
Need info on type of capacitor ,ceramic or polypropylene or polyester.
Resistor(non-inductive) .
I need to source these in the U.K. so ideas from maplin,farnell etc will be welcome.
Anyone tried this with ninka speakers before?