I have the Firebirds driven by an X350.5 and I recently switched from Tara Air 2 to Virtual Dynamics Master Bi-wire....AMAZING difference! I'd been frustrated by an upper mid hardness that didn't make any sense but the new cables cured it. I would never have suspected that a cable upgrade could make such a difference. I heartily recommend VD Master Bi-wires with your equipment! The VDs are somewhat of a pain to install but well worth it. Tara just didn't do it in my environment and I'm in the precess of replacing my Tara THE One I/Cs with VD Masters.
BTW, I moved the Air 2 cables to my downstairs system and they imparted an irritating edge to what had been a very warm and musical system...not good.
BTW, I moved the Air 2 cables to my downstairs system and they imparted an irritating edge to what had been a very warm and musical system...not good.