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source from unbalanced cables. Any time you use a balance input, your input gain will be 6 dB higher. You also have
your choice of a 1/4" input jack for unbalance or balance inputs. This is a tip/ring stereo jack which will work for
both. Use only shielded cables.
5. COOLING FAN
The fan is designed to run continually to cool the FET401. Be careful not to block the air around the grill—fan
area. if you are having Temp/Protect problems or if the incoming air is too hot, the "Protect" LED will come on. See
"Quick Set Up".