In good working condition.

From Rane:
The AC 22B can be either a Stereo 2-Way or Mono 3-Way crossover. Labels above the controls refer to the unit being operated in the 2-Way Stereo mode. Labels below the controls refer to the unit being operated in the 3-Way Mono mode. The AC 22B is a fully balanced output version of the popular AC 22 and is equipped with XLR conectors instead of the standard ¼" TRS jacks. All other features, specifications and operation are identical with the standard model with an added switch. Where the AC 22 is configured somewhat automatically by using switching jacks, the AC 22B is configured by a SYSTEM MODE switch added to the back of the unit. To operate the AC 22B in Stereo 2-Way mode, be sure that the Mode switch is set for STEREO 2-WAY. Follow the labels above the controls and jacks. When operated in the Mono 3-Way mode, the switch should be set in the MONO 3-WAY position. Follow the labels below the controls and jacks. In Mono 3-Way mode the Channel 1 High Output is unusable. This output is the high-passonly portion of the midrange filter. The Channel 1 High Level and the Channel 2 Master Level are also defeated on the front panel