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Max I/O with Pro Tools M-Powered
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Q: Will the ProFire Lightbridge or ProFire 2626 let me record with more than 18 simultaneous I/O in Pro Tools M-Powered?

A: No.  While both devices are capable of more than 18 simultaneous channels of I/O, Pro Tools M-Powered is limited to a maximum of 18 simultaneous channels of audio I/O.  On Windows systems, Pro Tools will display all inputs and outputs regardless of each port’s status, but any audio received on inactive input ports will be ignored.  This is normal behavior for this device on this platform due to the way Windows currently handles enabling and disabling of audio channels.

Pro Tools 9 supports up to 32 channels if I/O.