Needed an amp for my Hammond SKX when playing together with others. At home I can use two Philips MFB boxes (vintage 80's) which are (very!) good for the job. But I needed something more portable, handy and sturdy and with a bit more output punch. And with a mike-input too.
And, I did not want to spend too much money on it so decided for this Behringer K900FX.
Bought it some three months ago and I use it almost every day. The sound, the small graphic equalizer, build quality are better then expected and the output volume is ample for practicing together in a small combo. At stage it is okay as a monitor. It is a nice small portable amp with a punch.
The only disappointing feature is the DSP-processor, with so many different settings. Many settings are very alike. I only use the reverb for the microphone, which is okay.
But well, the main purpose I bought the unit for is loudspeaker/amp so the effects were more an extra for me and so I am happy with this product.