Can the F5T be made to accept XLR input?

Joined 2011
No, you have to use both channels of a stereo F5 amp to make one balanced amplifier channel.

For the left input channel, connect (+) to F5 channel A input, and (-) to F5 channel B input.
Then connect the speaker across the two red output terminals.

Do the same for the right input channel with a second stereo F5.