The configuration is simple (even simplistic). 3 buttons to adjust bass, medium and treble. 2 volume buttons. But it is very difficult to play on these settings to get a good sound. When the knob is in the volume of 1 for example, means nothing, and the pushing 2, is busting ears. Same concerns about the equalizer, impossible to find a balance, always extreme.
I use it for 2 years, but that has changed since the keyboard for a much higher quality, the amp is not at all up to the qualities of sounds on my keyboard. It produces a much too strident in the treble and too dull in the bass. So yes it is one of the cheapest on the market keyboard amps, but I highly recommend it. As invest a little more for an amp of brand recognition. The Eagletone is a waste of money ...
Keyboard Amplifier 35W.
Two Jack mono inputs (adjustable volume separately) + 3-band equalizer
An RCA auxiliary input + volume control
A headphone jack
Configuration very simple: you connect, you turn, you play. I bought it used, so I do not know if there is a manual (but anyway it would be useless).
The power is there. A little breath, however, even when all volumes are at 0 (it is the fault of the amp). However this is not a problem when we play. Also note that the amp is very sensitive to interference (phones, ...). It's not very serious, but we know
One remark though: the highs are too shrill, even playing on the equalizer. Most times it's not embarrassing, but it's almost unbearable to some synthesized instruments. Once you go up a bit in the treble, everybody jump!
I bought this model used a month ago, for only 40 € (about 100 € new). I use my home to my work pieces, and I did two live with.
But I insist on this issue treble, which can be very annoying in concert. On some instruments, you really have to be careful to attack the notes carefully!
For my part, I use a keyboard with only a stereo output, so I had to buy a stereo cable - 2 Mono to use the amp (if I connect directly to a stereo jack, the sound is horrible). But ultimately it's more the fault of the keyboard amp.
With experience, I certainly would do that choice. Even at the new price value for money is excellent. I highly recommend it!