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I perform with my 88 key Yamaha piano and 40 watt Roland amp. If I am playing outside, I use 2 amps. My only requirement is an electrical outlet. I play many outdoor weddings. Space requirement is equal to about a 5 foot triangle of space. My piano is a professional, Electronic Piano. This is actually better then a Keyboard which only has 66 keys or less. Classically trained, my 88 key gives me full range of the treble and bass.