The change to a "laid back" usually means that you're losing energy between the components.
Either that the new cables create a bad (hi resistance) connection (are the connectors dirty, bad quality??), or that they are higher capacitance & resistance & you're losing hi level (and probably mid-bass & bass) energy.
A long way of saying that if Nordost sounded generally OK, then the SPM will probably sound better thn the Red -- OR that any cable of similar construction & electrical properties to the Nordost is likely to suit your taste.
Either that the new cables create a bad (hi resistance) connection (are the connectors dirty, bad quality??), or that they are higher capacitance & resistance & you're losing hi level (and probably mid-bass & bass) energy.
A long way of saying that if Nordost sounded generally OK, then the SPM will probably sound better thn the Red -- OR that any cable of similar construction & electrical properties to the Nordost is likely to suit your taste.