Keyboard, drum machine and mic in one amp.
The manual's first setup shows the K900FX with a keyboard, a drum machine and a microphone. A CD player on AUX IN adds a playback, so you can play along to music.
Three channels into the effects
Each of the three channels has its own FX control into the integrated effects processor. Turn the FX control to select a preset, then add the effect to the main mix with FX RET. A footswitch on FOOT SW turns the effects processor on and off.
See where the feedback is
Press FBQ, and brightly lit fader LEDs on the 5-band graphic EQ show the frequencies causing feedback. Pull that fader down until its LED goes out. Channel 1 adds an XLR MIC input with phantom power for condenser microphones.
