My amplifier has identified a short circuit on one of my biwired mission 735i speakers. The cable I've been using is 4 year old QED Qudos Micro 4-core and I am sure it is the cable that is the problem by process of elimination. Can anybody help with the following:- 1. How do I identify where in the 4 metres of cable the shorting is taking place? 2. What would be a good replacement biwire cable. I am now using a new Yamaha DSP630 amplifier after the short circuit blew up my Sony STRDB925 so I'm a bit short on cash! 3. Now I know what caused the Sony amp to blow up where can I get it fixed cheaply? 4. Has anybody else had problems with this cable? thanks in anticipation!!!