Each channel has a gain control plus a 10 dB attenuation switch so one should engage the switch if one were going to plug a guitar into the XLR input and turn the gain down very low.
Nominal Input Level
1/4 inch input:.. -20dBV (-10dBV with 10dB attenuation switch)
XLR input:........ -40dBV (-30dBV with 10dB pad attenuation switch)
Maximum Recommended Input Level:
1/4 inch input:.....6dBV
XLR input:........ -14dBV
Input impedance
1/4 inch input:..10,000 Ohms
XLR input:.........2,400 Ohms
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