Pioneer DJ DJM-300 Fader Maintenance The internal components of the vertical and horizontal faders have been cleaned. The faders move very smoothly. Internal cleaning, panel removal, sponge washing, and cleaning of the knob bases were performed. All knobs are free of crackling and noise, and have a moderate amount of torque, resulting in smooth operation. Headphone and microphone operation are good. All functions are working well on this DJM-300. We have focused on using genuine parts and have finished the fader maintenance instead of replacing them with new generic parts. The ALPS horizontal and ALPS vertical faders move very lightly and smoothly. #AlphaTheta #DJMixer #pioneerdj #BrimainAmp #AnalogMixer