Behringer K900FX Ultratone Keyboard Amplifier (90 Watts, 1x12")
The Behringer K900FK Ultratone is a flexible 90-watt 3-channel PA system/keyboard amplifier with effects and FBQ feedback detection built in.
Overall User Ratings (based on 61 ratings)
Submitted February 19, 2012 by Ricardo Love in Los Angeles, CA
"BEST SYSTEM FOR THE MONEY"
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I play the guitar and use the Roland GR-55 Guitar Synth. I got this "PA Amp" because a guitar amp could not handle the wide frequency of highs and lows that come from the GR-55 (which has many keyboard sounds, deep basses and screaming high instruments) I have played live with this unit without the amp being mic(ed) or a line out being used and it performed wonderful. I bought a pole stand to put it on and that helps the sound get right at hear level (built in whole for pole like PA speakers). I talk to Roland Keyboard amp owners and the word is that their tweeters break easily and most have switch to the Behringer now. They have had theirs for some time and have had no problem with it (unlike the more expensive Rolands) I LOVE THIS THING!
Musical Background:
Pro Guitarist, Music Producer
Musical Style:
Modern Jazz and R & B
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Submitted June 6, 2008 by a customer from jefftveraas.com
"A little Swiss-Army knife of amps."
Again, good "bang-for-the-buck" and very versatile. I am a little wary about the reputation that Behringer has gotten for much of their stuff but it seems a good value even after 10 months.
Sound
I use this as a mini PA for solo gigs as well as a keyboard amp, acoustic guitar amp and the occasional bass amp (at moderate volumes). It does a fine job with all these applications. When set on the ground I usually have to roll off some low end and all your instruments have to use their own EQ's and pre-amps because this is (other than the low-imp mic input) a line level only device with only a 5-band graphic EQ to shape the overall tone. If you can live with that compromise this makes a fine little swiss-army knife of an amplifier.
Features
Sounds good, the digital EFX are nothing special but they are quite useable. The reverbs add a lot to the overall sound when used as a mini PA. The speakers seem matched well to the amplifier, all in all a nice package especially for the money.
Ease of Use
Very EZ to use.
Quality
This seems more solid and reliable than some older Behringer equipment I have used. It's not top-line but it doesn't cost like top-line either. All in all a good value.
Value
Good "bang-for-the-buck" and very versatile.
Manufacturer Support
Haven't dealt with the company so it's hard to say.
The Wow Factor
It's well designed, compact and fairly lightweight. sounds good too.
Musical Background:
F/T working musician and recordist
Musical Style:
Classic Rock, acoustic americana
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Submitted February 18, 2014 by Vernon G in Hauppauge, NY
"Behringer Amp"
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It seems like the best choice for the needs we had in mind. Just a trio playing in small venues for jazz style ambiance music. Has the volume we need for different size crowds. Still working on using the eq but all I can say now is that I'm very content and the only item that I wish it came with is a cover. Have not had to contact the manufacturer.
Musical Background:
Retired music teacher, I do free lance playing when opportunity arises
Musical Style:
Mostly jazz,Christian Jazz.
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Submitted December 22, 2012 by Bernie R in Toronto, ON
"great value amp"
I have the k900fx for five years. Works very well. I use it on pole stand with a Behringer 1202fx beside me providing control and effects, Combo works beautifully. Equalizer on amp works well and 1202fx fine tunes everything. Used to amplify my accordion with dynamic mics during solo gigs. Excellent value and when used for my purposes, compares very favorably with other much more expensive amps. Cabinet is very solid. Controls don't seem to be overly rugged but I have not had any problems at all. Never needed manufacturer support which you require!
Musical Background:
Accordionist---- many years----
Musical Style:
pop -standards -classics -folk -oldies
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Submitted March 19, 2012 by J C in Murfreesboro, TN
"Great amp for the money"
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It's solid. It's clean. So far has plenty of power, but have not taken it onstage.
Sound
Clean, smooth.
Features
XLR input is nice. Effects are fun, but probably won't be used that much. Haven't had much use for the feedback eliminator yet.
Ease of Use
Plug it in. Turn it up.
Quality
Solid as a rock so far.
Value
Absolutely.
Manufacturer Support
Have had no issues yet. Always had good luck / value w/ Bheringer stuff.
The Wow Factor
The EQ knobs have little red LED's. That looks pretty cool.
Musical Background:
Played about 25 years. I play out 3-4 times a month, play and record at home a lot, and in the studio about every 3 months.
Musical Style:
Soul, funk, electronic
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Submitted October 12, 2015 by Rodney C in Live Oak, FL
"Behringer Amp"
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I've only used this unit twice, one at practice and one at show. It fulfilled all I needed to get my sound out for my Yamaha 235 keyboard and Fender Stratacaster alongside my bandmates. So far, just what I was looking for.
Musical Background:
playing guitar for 30+ years, still learning keyboard.
Musical Style:
Country, classic rock
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Submitted June 8, 2015 by Richard MacDonald in Tucson, AZ
"More than my Money'sworth..."
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I've always considered Behringer the bottom of the food chain, but WOW, wasI surprised by this amp! I bought it for price point but I'm thrilled with the quality. It sounds AWESOME, I love the 3 channels, I can plug in my guitar and vocal and it's as clear as a bell but it also handles my synth, including low notes without distortion
Musical Background:
Younger days I was Pro, Now I still I write and play in church - 45 years...
Musical Style:
Pop,contemporary Christian
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Submitted February 13, 2019 by Ken VanDyke in Waianae, HI
"Behringer K900FX 90 watt amp"
Dig ItMy 11 yr old is very musical incline! Bought him a 2nd Hand fender strat with a small peavey 20 watt peavy amp. Loved the strat not to satisfied with his amp
Musical Background:
For my 11 yr old son. 3 years playing guitar. Also taking voice lesson from a local Hawaiian entertainer
Musical Style:
Classic Rock and some Hawaiian
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Submitted May 4, 2017 by a customer from gmail.com
"Okay for solo practice"
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Not great, peaked at very low volume levels. It does not work for full-band gigs or anything. DONT BUY FOR BAND PRACTICE. Had no other problems besides volume. Figures that the amp that weighs around 50lbs but has nothing worth while inside.
Musical Style:
rock
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