Behringer K900FX 90W 3-Channel Keyboard Amplifier with FX and FBQ

Keyboard players often struggle to be heard clearly in live settings, but the Behringer K900FX solves that with 90 watts of clean power and a custom 12" woofer plus high-frequency tweeter. This wedge-shaped combo amp delivers full-range sound for keyboards, acoustic instruments, and vocals, with three independent channels to handle multiple sources at once.

Who is it for

Performing keyboardists, multi-instrumentalists, and small bands needing a reliable stage monitor or main PA for rehearsals and gigs. Its wedge design makes it ideal for floor monitoring, while the link output allows stereo pairing for larger venues.

Main features

• 90 Watts RMS power through a 12" BUGERA woofer and 1" custom tweeter for clear, punchy sound.
• Three independent channels: Channel 1 with XLR mic input and 1/4" line input, Channels 2 and 3 with 1/4" instrument inputs.
• Integrated digital effects processor with 100 presets including reverb, chorus, flanger, delay, and pitch shifter.
• 7-band graphic EQ for precise tonal shaping and FBQ feedback detection system to eliminate feedback quickly.
• CD input (RCA stereo) for backing tracks, headphone output with independent volume, subwoofer output, and line output.
• Footswitch input for FX bypass (footswitch not included) and link output for stereo operation with a second K900FX.

Specifications

• Output power: 90 Watts RMS
• Speaker configuration: 1x 12" BUGERA woofer, 1x 1" custom tweeter
• Channels: 3 independent channels (Channel 1: XLR mic + 1/4" line; Channels 2 & 3: 1/4" instrument)
• Effects: 100 digital presets (reverb, chorus, flanger, delay, pitch shifter, etc.)
• EQ: 7-band graphic EQ with FBQ feedback detection
• Inputs: 3x 1/4" TS (Channels 1-3), 1x XLR (Channel 1), RCA stereo CD input
• Outputs: 1/4" headphone (with volume), 1/4" subwoofer, 1/4" line, link output, footswitch input
• Frequency response: 50 Hz to 18 kHz (-3 dB)
• Cabinet: Wedge-shaped, heavy-duty impact-resistant enclosure
• Power supply: AC 230V, 50Hz (EU standard)

Tips

Use the FBQ system to quickly identify and cut feedback frequencies during soundcheck. For larger stages, link two K900FX units for a wider stereo image. Connect a footswitch to bypass effects instantly between songs.