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Behringer ULTRATONE K450FX Keyboard Amp/PA System   

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The super-compact, self-contained Behringer ULTRATONE K450FX is a perfect keyboard amp or PA setup for public address systems, keyboards, voice, or v...Click To Read More About This Product

Available 06-16-2017

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Big-amp features, small-amp convenience.

The super-compact, self-contained Behringer ULTRATONE K450FX is a perfect keyboard amp or PA setup for public address systems, keyboards, voice, or various drum/backing machines. 45W of power are handled confidently by a headroom-rich 10" speaker, making sure that you can faithfully reproduce a broad repertoire of signals. Behringer includes features usually found in much larger amps: 24-bit digital FX with 100 hot presets; FBQ Feedback Detection System; 5-band EQ section; CD input; headphone output; and full 3-channel operation with separate volume controls and FX sends per each channel plus an additional XLR mic input for connecting dynamic microphones.

  • Powerful 10'' speaker for ultimate sound reproduction
  • Integrated 24-bit digital FX processor with 100 awesome presets including reverb, chorus, flanger, delay,
  • pitch shifter and various multi-effects
  • Revolutionary FBQ Feedback Detection System instantly reveals critical frequencies
  • Full 3-channel operation with separate Volume and FX Send per channel
  • Additional XLR mic input on Channel 1 for direct connection of dynamic microphones
  • Dedicated 5-band graphic EQ for awesome sound shaping
  • Line output for direct connection to your mixing console
  • Gain section with FX Return level and Master Volume
  • Subwoofer output for ultimate low-end power
  • CD input allows you to play along to your favorite music
  • Separate headphone output”perfect for quiet practicing
  • Integrated 35-mm pole socket for stand mounting and use as PA System
  • High-quality components and exceptionally rugged construction ensure long life
  • Conceived and designed by Behringer Germany

ULTRATONE K450FX Keyboard Amp/PA System

  • Inputs:
    Line In 1 - 4 1/4" TS connector
    Input impedance approx. 30 kOhm balanced
    Input impedance approx. 20 kOhm unbalanced
    CD In/Aux In RCA connector
    Input impedance approx. 20 kOhm unbalanced
    Mic In 1 XLR connector
    Input impedance approx. 2 kOhm balanced

    Headphones connector 1/4" TRS connector
    Line Out 1/4" TS and XLR connector
    Output impedance 1/4" TS connector: approx. 150 unbalanced
    XLR connector: approx. 300 Ohm balanced
    Output impedance approx. 150 Ohm unbalanced
    Sub Out 1/4" TS connector
    Output impedance approx. 150 Ohm unbalanced

    Type Graphic EQ with FBQ Feedback Detection
    Frequency range 63 Hz / 250 Hz / 1 kHz / 3.5 kHz / 12 kHz
    Bandwidth 2/3-oct.
    Control range +12 to -12 dB

    Digital Effects Processor:
    Converters 24-bit sigma-delta, 64/128-times oversampling
    Sampling rate 40 kHz

    Type 10'' Bugera speaker
    Input impedance 4 _

    General export model 120/230 V, 50 - 60 Hz
    Power consumption approx. 75 Watts
    100 - 120 V:
    2.5 A H 250 V
    220 - 240 V:
    1.25 A H 250 V
    Mains connection Standard IEC receptacle

    16 1/2" x 17 3/8" x 11 3/4"
    Weight: 32.19 lbs

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BehringerULTRATONE K450FX Keyboard Amp/PA System

(based on 1 review)

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Reviewed by 1 customer

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(31 of 225 customers found this review helpful)


Nice amp for practice or gigs


from Northern Illinois

Site Member

Comments about Behringer ULTRATONE K450FX Keyboard Amp/PA System:

I play in the orchestra pit for local community theater groups. I needed an amp that would fit into a small space and still be heard. It's both compact and lightweight. It has three inputs with individual volume controls so I don't need a sub mixer. The 45W amp and 10" speaker put out enough power to keep up with other musicians and cut through for solos. It has a built-in effects processor. This might be useful for vocals or miking an acoustic instrument. The 99 effects are a collection of reverb, chorus, flanger, delay, and multi-effects with preset decays, delays, etc. as appropriate. It doesn't have a bass port. Instead, it has a vent in the back. As a result, low frequencies tend to roll off a bit. However, there is an output to connect to a subwoofer. Another nice feature is that there is a line out jack on the back so you could connect directly to a mixing console. Be sure to visit the Behringer website for a detailed description and specs.

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