Particularly the krk rp series? I'v read on mac rumors that they should be pretty loud but iv also read on other web pages such as here that lower (conversation level) is better http://www.homestudiozone.com/monitoring.php There are a lot of opinions on how loud the sound should be for monitoring. I would recommend that you do most of your monitoring at a fairly low level, no louder than if you were listening to a conversation. This is for three reasons. Firstly, music always seems to sound better when you pump it up a bit and you really want it to sound as bad as it can be, secondly, you can be more discriminating at reasonable listening levels (in fact the quieter it is, the more you need to concentrate on the material), and thirdly, you won’t suffer from fatigue nearly as much. Every now and again though, you should turn the level up to see if there are any dominating sound at high volumes, especially at the high and low ends of the spectrum. A bass that sounds great at low levels, or a hi-hat that is perfectly balanced, can be overpowering when turned up.