Behringer Ultratone K450FX - 45W 10" Keyboard Amp

45-Watt, 3-Channel Mixing Keyboard Amp with 10" Woofer
Behringer Ultratone K450FX - 45W 10
Behringer Ultratone K450FX - 45W 10
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Behringer Ultratone K450FX - 45W 10" Keyboard Amp
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Small Amp with Big Features

Ever run into a gig where your playing area is too small for everyone to bring amps, or even too small for a full blown PA? The Behringer Ultratone K450FX is a 3-channel, 45W all-in-one solution. A single 10" woofer gives you full spectrum range to cover everything from bass to keys, guitars and vocals. A built-in feedback protection system will save your ears and keep the crowd happy too. Sculpt your sound with the 5-band EQ and onboard effects. The K450FX also works as a great keyboard amp with its three stereo inputs.

Behringer Ultratone K450FX Keyboard/PA Amp at a Glance:
  • Flexible ins and outs
  • EQ and feedback supression

Flexible ins and outs
Expand your sound by adding more Ultratone amps, or connect a subwoofer via the Sub Out jack. The K450FX also a 1/4" out to go to your mixer or stage snake. A handy aux input, via RCA jacks, lets you hook up MP3 players, CD players, and more. Each channel on the Ultratone K450FX features 1/4" inputs, and the first channel has an XLR input for a microphone. A headphone jack was incorporated for silent practicing. This a perfect amp for a keyboard player with multiple keyboards.

EQ and feedback supression
The Behringer Ultratone K450FX features a 5-band EQ so can really dial in that perfect sound. Make you performance shine with onboard effects like reverb, delay, chorus and more. To fight the dreaded feedback, Behringer has included the proprietary FBQ Feedback Protection System to ensure problem free gigs.

Behringer Ultratone K450FX at a Glance:

  • 10" woofer
  • 45W
  • Subwoofer output
  • FBQ Feedback Protection System
  • Onboard FX
  • 3 channels
  • XLR input
  • Aux input
  • Headphone out
A great keyboard amp or compact PA, the Behringer Ultratone K450FX amp is ready to take to the stage.

Additional Media

Keyboard Amp Buying Guide
Ultratone K Series User Manual

Tech Specs

Speaker Size 1 x 10"
Total Power 45W
Inputs 3 x 1/4", 1 x XLR, 1 x RCA (Stereo)
Outputs 2 x 1/4"
Mounting Options Pole
Height 17.375"
Width 16.5"
Depth 11.75"
Weight 32.19 lbs.
Manufacturer Part Number K450FX

Customer Reviews

Based on 8 reviews
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Power Plus

This amp is perfect for the extras. Rhythm machine, PA, etc. Use for keyboard in small areas. The power is there.
Music background: Solo Pianist

Great little unit!

Does everything I need at the moment! I use it for my synthesizer, and you can run your mic through it and other stuff whether you're doing a small venue or jamming in your living room! The price was right too! Very pleased!
Music background: Hobby guitarist

True "in house" amp made

I was skeptical of spending a couple hundred dollars for an amp to practice and record in my home, but I'm so glad I went a head and did it. This is truly the most amazing little amp I have ever used. I done things with this little amp that my much larger amps at four times the price would not do. Low and high ends are unbelievable. You really have to use one to appreciate it. And when you buy from Sweetwater, your guaranteed the finest service and delivery.
Music background: 50 years of doing one man band shows with guitar and keyboard

Great practice amp!

Behringer has really over the last few years upped their quality while keeping their prices affordable. This is a great amp for practice or live use. I have my Korg X50 and Korg R3 hooked up to it along with my Electron Machine Drum. Sounds great. I would have liked it to have three stereo channels but for what I paid for it, it's definitely worth the money. Down the road I'll probably pick up the bigger brother to this, the Ultratone KXD12 to compete with live drums if I start getting into bands again, but for right now it definitely meets my needs and sounds great.

Compact and Low Cost QUALITY

This thing is excellent, it's your all-in-one band amp. I run an Audio-Technica MB 3k/c, Roland Lucina AX-09 Synth, and an Alesis SR-16 drum machine through this thing simultaneously and it still has the power to play them all clearly and loudly. This is one compact powerhouse people. It's big, but it's not so big that you can't easily pick it up and carry it around but it still has enough power to (most likely) play a bar/small venue. I'm putting my money on it being able to, I plan on utilizing it for local shows in small venues around here in the near future, that is how good I think this is. I will DEFINITELY be using it for recording purposes too. If this amp had more slots it could probably sustain playing more instruments on it. The built in FX are a nice bonus too. The negatives are very few... -The exterior has a fuzzy/carpet covering (I wanted a hard solid exterior, mostly to put stickers on it. So this is just a personal thing). -The knobs seem kind of fragile. They stick up high and feel hollow, I'm kind of paranoid about busting them. -Even though it has a dedicated microphone slot it SHARES the volume/FX knob with slot 1. So if (for example) you plug a keyboard into slot one and you plug in a mic they are both controlled by volume knob 1. This isn't made very obvious by the labels. So my set up is Slot 1-Mic, slot 2-Keys, and slot 3-drum machine. So yeah I highly recommend picking one of these things up!
Music background: Hobby/in a band that's working on its first album
See also: Keyboard Amps, Behringer, Behringer Keyboard Amplifiers