Rolls ILC19 In-Line Level ControlThe ILC19 In line Level Control from Rolls is a line level control for XLR balanced signals. It features a female input jack on the front and a male output jack on the rear with a rotary level control knob on the front panel. It can also be used in reverse, meaning that the rear male jack can be the input, with the front female jack being the output. The ILC19 is compatible with a mic or line level balanced signal.