Tellurium Blue Diamond (formerly known as Green) is the companion cable to Tellurium Ultra Black and is probably more suitable for slightly bright systems as they have a very slight “mellowing” effect. This can be particularly beneficial with class D and T amplifiers. This cable has been significantly improved from its original well reviewed green jacketed version. The original green jacketed design had a ridiculously long burn in time before it showed its silky best and displayed what it could do. Often its “un burnt in” performance was so far from what the fully burnt in version was capable of that it was like two different cables.