Jamo KP4.6 Amplifier/Keypad Each zone is controlled by a KP4.6 wall control panel, a combination amplifier/keypad with volume, bass, treble, balance and fader control. It also supports infrared control and pass-through to source equipment. In addition, the KP4.6 features two local inputs and allows local source selection. A 3 color LED indicates operational status and control functionality.