Mit oracle ma-x, ma, v1.2,v2.2,v2.1 Ic

The order of performance is as follows:

Oracle MA-X and Oracle MA (the MA-X cable at 0 should sound the same as an MA cable and can be adjusted to increase or decrease "articulation". Theoretically, the MA-X is top of the line but MIT recommends no more than one in your system). This is current generation and superior to the old cables.

Oracle v1.2 is the top of the line of the older generation. Oracle v2.2 is next and Oracle v2.1 is an older revision of Oracle v2.2.

Essentially, if you're in the market, look for the Magnum MA and Oracle MA/-X.

Essentially, the Oracle MA adds a substantial increase in liquidity, superior low end control and improved top-to-bottom articulation and detail retrieval. That's not to say the Magnum MA isn't an excellent cable, it's just that the Oracle MA builds upon the foundation of the Magnum MA and gives more of pretty much everything.

With regard to biamping, I've never done it so it's beyond my area of expertise, sorry.