Roland KC-400 150W 4-Channel Stereo Mixing Keyboard Amplifier

Roland KC-400 150W Stereo Mixing Keyboard Amplifier

The Roland KC-400 150W keyboard amplifier combines a four-channel stereo mixer, 12-inch woofer, horn tweeter, and flexible audio connectivity in one portable cabinet. Its full-range two-way speaker system supports keyboards, stage pianos, synthesizers, electronic instruments, and vocals while providing dedicated monitoring and expansion features for professional stage and rehearsal setups.

A redesigned 150-watt power section works with Roland's twin bass-reflex cabinet to deliver extended low-frequency reproduction for instruments that demand a wide frequency range. Four stereo line channels support multi-keyboard performance rigs, while Channel 1 adds an XLR microphone input. Players seeking a keyboard amp with built-in mixer, keyboard monitor for live performance, or 150W stage keyboard amplifier can manage several sources directly from the front-panel controls.

The KC-400 also integrates easily with larger sound systems through stereo line outputs, a dedicated subwoofer output, and Stereo Link connections. Channel 4 includes Output Select for routing click or guide signals separately from the main mix. A three-band master EQ and Shape function provide additional tonal control, while metal input and output jacks support repeated professional use.

Key Features

• 150W Amplifier: Provides full-range amplification for stage pianos, synthesizers, organs, rhythm machines, and other electronic instruments.
• Two-Way Speaker System: Combines a custom 12-inch woofer with a horn tweeter for broad frequency coverage.
• Four Stereo Input Channels: Connects multiple keyboards and electronic instruments through an integrated front-panel mixer.
• XLR Microphone Input: Channel 1 accepts a balanced microphone signal in addition to stereo line-level instruments.
• Twin Bass-Reflex Cabinet: Extends low-frequency response for keyboards and instruments with substantial bass content.
• Channel 4 Output Select: Supports flexible routing of monitoring, click tracks, and guide signals during live performance.
• Stereo Link: Connects a second KC-400 to expand available inputs and create a true stereo amplification system.
• Flexible Outputs: Provides stereo line, subwoofer, headphone, and Stereo Link connections for stage, recording, and monitoring setups.

Technical Specifications

• Model: KC-400
• Product Type: Stereo mixing keyboard amplifier
• Rated Power Output: 150 W
• Woofer: 1 x 12" custom speaker
• High-Frequency Driver: 1 x horn tweeter
• Channel 1 Nominal Input Level: -50 to -20 dBu at 1 kHz
• Channel 2 Nominal Input Level: -20 dBu at 1 kHz
• Channel 3 Nominal Input Level: -20 dBu at 1 kHz
• Channel 4/Monitor Input Level: -20 dBu at 1 kHz
• Auxiliary Input Level: -10 dBu at 1 kHz
• Stereo Link Input Level: 0 dBu at 1 kHz
• Line Output Level: +4 dBu at 1 kHz
• Stereo Link Output Level: 0 dBu at 1 kHz
• Sub Output Level: +4 dBu at 1 kHz
• Channel 1 Balanced Input: XLR
• Channel 1 Line Inputs: Left/Mono and right 1/4" phone jacks
• Channel 2 Line Inputs: Left/Mono and right 1/4" phone jacks
• Channel 3 Line Inputs: Left/Mono and right 1/4" phone jacks
• Channel 4/Monitor Inputs: Left/Mono and right 1/4" phone jacks
• Line Outputs: Left/Mono and right 1/4" phone jacks
• Auxiliary Inputs: Left and right RCA phono jacks
• Stereo Auxiliary Input: 3.5 mm stereo mini phone jack
• Subwoofer Output: 1/4" phone jack
• Stereo Link Connections: 1/4" input and output phone jacks
• Headphone Output: Stereo 1/4" TRS phone jack with mono signal output
• Channel 1 Control: Mic/Line
• Channel 2 Control: Line
• Channel 3 Control: Line
• Channel 4 Controls: Line and Output Select
• Headphone Control: Volume
• Equalizer: Low, Middle, High
• Additional Controls: Shape, Master, Power
• Indicator: Power
• Power Consumption: 40 W
• Dimensions (W x D x H): 19.3 x 15.2 x 18.6"
• Weight: 48.6 lb

What's In the Box

• Roland KC-400 Keyboard Amplifier
• Owner's Manual