XO-23, 2 Band Stereo Crossover has low, High Gain Control and simple frequency adjustment and separate subwoofer adjustment & gain control. A low cut rumble filter and phase reverse button.

Power Switch, Phase Switch
Crossover Frequency Control
L/H Output Level Control
Subwoofer Output Level Control
Sub Crossover Frequency Control
Fuse Compartment
Input Connectors 1/4 XLR
Output Connectors 1/4 XLR
AC Voltage Selector Switch
AC Cord
2