It can operate on both 12V and 48V phantom power and has low output impedance (25 ohms to P12 and 35 ohms to P48, respectively). The current consumption is 8 mA (P12) or 4 mA (P48).
Externally, the CMC 6 xt differs from the standard version only in the engraving by an "xt" for "extended" on the back. But the essential thing is its CMC 6-based circuit, which has been extended to continue the high-frequency response up to 40kHz.