The Yamaha P-120 is a power amplifier designed for uses of all types. We have one of these at the studio where I'm working, although I've only set it up and used it on a few occasions. We have a lot of 'floating' gear, as there are a number of different studios on site here and it's good to have a bunch of miscellaneous gear as you never know when someone might need something. I've usually set this up with a set of passive Tannoy monitors, although they can be used in louder settings for a PA systems if needed. There is another Yamaha P-120, which is a newer electric piano model, not to be confused with this power amp. The amp has a seven band equalizer, although we didn't use it at all since of course in the studio this wouldn't be necessary. However, if you're using it for live sound or otherwise, I can see it being useful to tune it to the space you're working in. This unit will fit in a traditional rack casing if you so choose, taking up two spaces. It also has handles for moving it in and out of racks, as it's decently heavy. The Yamaha P-120 power amplifier seems to be pretty rare for whatever reason, but it does the job just fine for us as a back up and sees occasional use. I can't say much about the price since I really am not sure what kind this would command if you would even be able to find one. I don't think that it would be worth it to search around for one of these, as it's a pretty basic power amp and there are many other models out there just like it. So while I don't know that this is the first amp I'd recommend if you're looking for a set for your studio monitors, if you had one or found one cheap it would certainly be sufficient.