The fact that the impedance of the Prodigy drops to about 1 ohm at 20kHz, and is nominally 4 ohms at lower frequencies, makes it essential that the cable have low inductance and low resistance.
Kimber 8PR and Cardas Cross Speaker, along with several other cable types from those manufacturers, meet those requirements.
The Purist Audio website does not appear to specify the inductance of their speaker cables. And some of them are indicated as being solid core types, which I would not expect to have low inductance.
I have no experience with Martin-Logan speakers, and so I can't add anything beyond those thoughts.
Regards,
-- Al
Kimber 8PR and Cardas Cross Speaker, along with several other cable types from those manufacturers, meet those requirements.
The Purist Audio website does not appear to specify the inductance of their speaker cables. And some of them are indicated as being solid core types, which I would not expect to have low inductance.
I have no experience with Martin-Logan speakers, and so I can't add anything beyond those thoughts.
Regards,
-- Al