At one time I had a diagram on how to wire a 'series cable' for externally hooking two 4 ohm cabs in a series to make an 8 ohm stack ... I can no longer find it, can someone please direct me to some place that sells a decent quality pre-made cable or a diagram on how to wire one for myself and maybe where to find a nice oversize female 1/4" plug to fit it all in ?? .. thank you