Behringer K900FX Ultratone Keyboard Amp

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  • 12'' Speaker & Custom-Made 1'' Driver For Powerful Performance
  • Integrated Digital FX Processor Offers 100 Presets
  • Dedicated 5-Band Graphic EQ For Sound Shaping
  • Revolutionary FBQ Feedback Detection Eliminates Unwanted Noise
  • Independent Volume & FX Send Controls Per Channel

Behringer K900FX Ultratone Keyboard Amp


The Behringer K900FX Ultratone Keyboard Amp is a compact and portable 90-watt amplifier that features a 12'' Bugera speaker and revolutionary FBQ Feedback Detection technology. Equipped with three independent stereo channels, each with independent Volume and FX Send controls, the K900FX is the perfect all-in-one solution for keyboard, electronic drums and vocal performances. Delivering extremely accurate sound reproduction and powerful low-end responses, the K900FX Ultratone Amp is suitable for use on stage and in the studio.

Product Ref: 6335

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Full Description

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  • Ultra-flexible 90-watt, 3-channel PA system
  • Ideal for keyboard & vocals
  • Powerful 12-inch Bugera woofer & custom-made 1'' driver
  • Integrated digital FX processor with 100 presets including reverb, chorus, flanger, delay, pitch shifter & more
  • Revolutionary FBQ feedback system
  • Full 3-channel operation with separate volume & FX Send per channel
  • Additional XLR mic input on channel 1
  • Dedicated 5-band graphic EQ
  • Line output for direct connection to mixing consoles
  • Main section with FX return level & master volume
  • CD input
  • Separate headphone output
  • Integrated 35-mm pole socket


  • Power Amplifier Output: 90 Watts
  • Loudspeaker Type: 12'' Bugera™ Woofer and Custom-Made 1'' Driver
  • Loudspeaker Impedance: 4?
  • Sampling Rate: 40kHz
  • Digital Effects Processor: 24-Bit Sigma-Delta, 64/128-Times Oversampling
  • Power Consumption: 150 Watts
  • Dimensions: 429mm x 492mm x 299mm
  • Weight: 18.8kg / 41.45lbs

Audio Inputs

  • Line Input 1 - 4: 1/4'' TS Connector
    • Impedance: Approx. 30k?, Balanced
  • Stereo Link Input: 1/4'' TS Connector
    • Impedance: Approx. 20k?, Unbalanced
  • CD/Aux Input: RCA Connector
    • Impedance: Approx. 20k?, Unbalanced
  • Mic Input 1: XLR Connector
    • Impedance: Approx. 2k?, Balanced

Audio Outputs

  • Headphones: 1/4'' TRS Connector
  • Line Output: 1/4'' TS and XLR Connectors
    • Impedance: 1/4'' TS Approx. 150?, Unbalanced / XLR Approx. 300?, Balanced
  • Stereo Link Output: 1/4'' TS Connector
    • Impedance: Approx. 150?, Unbalanced
  • Sub Output: 1/4'' TS Connector
    • Impedance: Approx. 150?, Unbalanced


  • Type: Graphic EQ with FBQ Feedback Detection
  • Frequency Range: 63Hz/250Hz/1kHz/3.5kHz/12kHz
  • Bandwidth: 2/3-Octave
  • Control Range: +12dB to -12dB