User’s Guide for the C R AT E KX-220 Stereo Keyboard Amplifier Please read this user’s guide before using your new amplifier!
KX-220 Stereo Keyboard Amplifier Congratulations! You are now the proud owner of one of the most versatile keyboard amplifiers available, the Crate KX-220 Four Channel Stereo Keyboard Amplifier. This incredible unit features Crate’s legendary performance and high quality construction in a rugged and easy to operate package. Your KX-220 is proudly made in America, using only the best components.
KX-220 Stereo Keyboard Amplifier Features: Below are some of the outstanding features which set the KX-220 in a class by itself. Additional information on these features can be found throughout the remainder of this manual.
KX-220 Stereo Keyboard Amplifier The Top Panel: 4
KX-220 Stereo Keyboard Amplifier The Rear Panel: 15 21 15 15: Input Jacks (channel 1–3): Connection of an instrument, drum machine, tape deck channel, microphone or other high impedance (balanced or unbalanced) line level signal with 1/4” plug can be made here. For stereo inputs use the right/mono jack for the right channel input and the left jack for the left channel input. For two mono inputs into one channel, use the right/mono jack for one and the left jack for the other.
KX-220 Stereo Keyboard Amplifier Sample Hookup Diagram: In the diagram below, the two mono keyboards are both connected into channel 1. The channel 1 pan control lets you adjust the relative level between the two signals. The metronome plugged into channel 3 may be heard through the amplifier but not the house sound system if the line out select switch is pressed in. A stereo effects device has been connected to the effects loop, although a mono device can also be used.
KX-220 Stereo Keyboard Amplifier System Block Diagram: MAIN BUS R RIGHT/MONO INPUT L REV/ EFF SEND BUS LINE OUT BUS R L PAN LINE OUT RIGHT/MONO LEVEL LINE OUT LEVEL LEFT INPUT LINE OUT LEFT REV/EFF SEND PREAMP OUT RIGHT/MONO POWER AMP IN POWER AMP RIGHT CHANNEL EQUALIZER RIGHT/MONO INPUT EXTERNAL SPEAKER PAN LEVEL LIMITER MASTER CROSSOVER LEFT INPUT REV/EFF SEND RIGHT/MONO INPUT LEFT CHANNEL EQUALIZER PREAMP OUT LEFT EFF EFF RET SEND RIGHT/MONO PAN LEVEL EFF RETURN LEVEL LEFT INPU
KX-220 Stereo Keyboard Amplifier Technical Specifications Output Power Rating 160 watts RMS minimum @5% THD @ 4 ohm internal speaker 220 watts RMS with 4 ohm extension speaker Maximum Signal Accepted Channels 1,2,&3 Channel 4 Effects Return Right/mono / Left: 6 volts peak to peak Instrument: 28 volts peak to peak; Microphone: 4 volts peak to peak Right/mono: 27 volts peak to peak; Left: 27 volts peak to peak Nominal Input Impedance Channels 1,2,&3 Channel 4 Right/mono / Left: 22k ohm Instrument: 220k
