Do you have a question about the Grace BiX and is the answer not in the manual?
Gain, Low EQ, and High EQ controls for signal shaping.
Boost control, Boost/Mute footswitches and active LEDs.
9VDC power input, DI Out, and Line Out connections.
How to set the input gain and use the signal/clip LED.
Adjusting the low-frequency shelving EQ.
Adjusting the high-frequency shelving EQ.