i have a sv 120.. its not silent for the fact that you can hear it when it is unplugged but the concept that yamaha is bringing about is it produces little sound unlike an acoustic one. it is true that you can practice at night without disturbing poeple because it isnt that loud, but the sound sound is enough to disturb... lets say someone sleeping behind you while you are playing. the sound is so metallic when unplugged, no depth or anyting. for those who are planning to buy the sv 200. if you are on a budget, id prefer you buy the 120 instead. people had been saying that the 200 sounds a lot better but ideally, just configure you 120 correctly (with the right reverb , stuff on the desk) it will sound as good as the 200. comparing them,, 200 sounds a lot nicer than 120 in the case of plug and play (where you just plug them in an amp and play),, but with the right electrical configuration, may it be by a stomp or the synthesizer, you can virtually make them sound the same. get what i mean? but im not stopping you from buying one. 200 is amazing and 120 will sound as amazing if you know a bit on sound engineering.