Behringer Ultratone K900FX 90 watts
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Behringer
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Essential Information About the Behringer ULTRATONE K900FX Keyboard Amplifier
- 90 W stereo in a compact format for rehearsals, stage, and keyboard-piano use.
- BUGERA 12'' woofer + 1'' tweeter in a bass-reflex enclosure for tight lows and precise highs.
- 24-bit multi-effect (100 presets) and integrated FBQ feedback detection system.
- 3 stereo channels with volume/aux per channel, including XLR mic input on channel 1.
The Versatile Link in the ULTRATONE Series
Designed for keyboard players, the K900FX embodies the balance between power, simplicity, and reliability. It serves as an all-in-one amplifier for digital pianos and synths, ready to amplify a small band or rehearsal room without the need for additional effects racks.
Keyboard Design
Designed for keyboards and digital pianos, the K900FX combines 90 W amplification with an optimized bass-reflex enclosure. The 3 stereo channel format offers a true small built-in mixer with volume and effect send controls on each channel, plus a dedicated XLR mic input on channel 1.
Sound Quality
Sound projection relies on a reinforced BUGERA 12'' woofer and a 1'' tweeter for a fully stereo image that is clear and powerful. The dedicated graphic equalizer and master volume control allow quick adaptation of the sound to the room and repertoire.
Built-in Effects
- Reverbs, chorus, flanger, delay
- Pitch shifter and effect combinations
- 24-bit / 100 presets processor
- FBQ system for fast feedback frequency detection
Technical specifications
| Power handling | 90 W | Headphone outputs | Yes |
| Speaker diameter | 12" | Color | Black |
| Fictitious load | No | Connections | XLR, SDI, Headphone mini-jack, RCA |
| IR loader | No | ||
| Power | 90 W stereo | Channel 1 | XLR microphone input (dynamic mic) |
| Speakers | reinforced BUGERA 12'' woofer + 1'' tweeter | Main section | effect return and master volume |
Questions frequently asked
Is the Behringer Ultratone K900FX suitable for a digital piano?
With 90 W stereo, a 12-inch BUGERA woofer, and a 1-inch tweeter, this model is designed for amplifying digital pianos and synthesizers. Its bass-reflex enclosure enhances low-frequency projection.
How many sources can be connected to this keyboard amplifier?
Three stereo channels are available, each with volume and effect send. Channel 1 also includes an XLR input intended for a dynamic microphone.
What effects are integrated into the K900FX?
The 24-bit processor offers 100 presets including reverbs, chorus, flanger, delay, and pitch shifter. An effect return control is present in the main section.
Can headphones be used with this amplifier?
A headphone output enables silent operation, while the RCA CD input is used to connect an accompaniment source.
What outputs are provided to connect to a PA system or subwoofer?
The line output sends the signal to a mixer or PA system. A subwoofer output is dedicated to adding a bass cabinet. The 35 mm mount also allows the amplifier to be installed on a stand.



