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.

Behringer ULTRATONE K450FX Keyboard Amp/PA System Features:

• 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

It's got all the features you'd want for the big gigs in a practice-size unit. And the price is definitely right! Order now!

Behringer ULTRATONE K450FX Keyboard Amp/PA System Specifications:

• 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
  
  Outputs:
• 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
  
  EQ:
• 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
  
  Loudspeaker:
• Type 10'' Bugera speaker
• Input impedance 4 _
  
  Power:
• 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
  
  Dimensions:
• 16 1/2" x 17 3/8" x 11 3/4"
• Weight: 32.19 lbs

Behringer ULTRATONE K450FX Keyboard Amp/PA System

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Average of 5 User Ratings

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Customer Reviews

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Great Practice Amp

Posted by John Benson from Bethesda, MD on Aug 25, 2008

Experience w/product: I have heard about it

Reviewer's Background: Hobbyist

Reviewer's Play Style: Rock

We use it for vocals when we practice. It's loud enough to be heard over the drums, and we've never had problems with it. The extra features are fine, but we don't use them much. It's a great deal for the price.

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Good Amp but........

Posted by Larry Rhoads from Mt.Vernon, Indiana on Mar 8, 2008

Experience w/product: I own it

Reviewer's Background: Active Musician

Reviewer's Play Style: Classic Country and Gospel

I have used a 50 pound Peavey for a long time, but since I'm getting a bit older, my back don't like to carry the heavy amp much anymore. I bought this Behringer because it was about 20 pounds lighter, relative low cost and loaded with a lot of "bells and whisles". This amp has plenty of output, and has solved my weight handling problem. For me, it has two draw backs. It takes more effort and time to adjust all of the imputs when setting up (I use three - one for vocal, one for a drum machine and one for my guitar). Even though it has equlizers that will indicate range of frequencies that cause feedback, I still find it seems to respond to feedback that my Peavey doesn't. Not a biggie but the amp has two mic inputs, one standard 1/4 inch phone plug and one XLR input. Since both have greatly different input impedances and only one volume control for both, using both mic inputs at the same time is really not practical. A volume control for each mic input would have been a big improvement. So, when I know I'm going to need two mics for a gig, I revert back to the 50 pound Peavey and pray this old man's back back don't break.

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Good Little Amp

Posted by Crazy Fingers Sanchez from Miami, FL on Jan 18, 2008

Experience w/product: I own it

Reviewer's Background: Active Musician

Reviewer's Play Style: Rock, jazz, worship, and whatever pays.

I got tired of lugging my 200W Hartke amp back and forth to practices. So I bought this little Behringer to fill the role. It's a pretty decent little amp. I only use it for practice with my keyboard and it does that job just fine. For gigs I either use the bigger amp or plug into the house system. It's got plenty of inputs and effects. It even sounds decent when I play my bass through it, but starts to break up at the higher volumes. We also use it at practice for vocals too, and it sounds alright. I really like the RCA input jacks too. I always use them to plug in my iPod at practice and show the guys new songs.

Overall a great amp for small spaces, especially for this price.

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Guitar/Mic amp

Posted by Ken Majors from Northwest Ohio on Oct 11, 2007

Experience w/product: I own it

Reviewer's Background: Active Musician

Reviewer's Play Style: Old Rock, Country

I use this with an Ovation Acoustic Electric and a Microphone. Playing a small room with 100-150 people. Works great for this application. It is possible to plug in another mic (using 1/4" plug), and another guitar or keyboard. The most I have had was 2 guitars, and a Mic. It handled it with no problems and it sounded pretty good. No feedback issues and it sounded clear and crisp. The effects are a little disappointing, but that isn't why I bought it anyway. It seems to me the effects aren't all that "effective". Good little amp for the money though.

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Behringer K450fx Keyboard amp

Posted by Imsnowyone from Langhorne, Pa. on Apr 21, 2007

Experience w/product: I own it

Reviewer's Background: Active musician

Reviewer's Play Style: Oldies/big band

I am using the amp with a yahama psrgx76 Keyboard. This amp has it all, with 100 different effects and a 5 band equalizer. But, the effects are not nesseseary because the same thing is built into the keyboard. It has great bass response, and good mid-range. The hi-frequency is a bit tinney.This would be a great guitar amp they way it is designed. It works well for vocal and keyboard mixing, and I use it in a small room with about 100 people.

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Behringer ULTRATONE K450FX Keyboard Amp/PA System

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