Pros: Balanced sound
Cons: Relatively short life span.
For all intensive purposes, these are good sounding speakers. They're well balanced, not super punchy on the bass, and are reasonably accurate for the casual ear. It's nice to have headphone outputs for times you want to keep the music down if someone else in the room doesn't want to listen to what you're listening to at the time.
However, that's pretty much where the good things end.
After about using these speakers for 16 months (so they're beyond their 1 year warranty), they developed an annoying oscillating buzz when there's nothing playing, and the buzz is there when there is music playing. Volume speaker light is also non functional, and this happened at the same time as the appearance of the buzz.
Unfortunately, an incident also happened to my AV30's (yes, I had a pair of the other model) about 16 months into ownership. However, in that pair's case, the control speaker is mute.
So for an idea of how much I use these speakers (both sets when they worked), these are hooked up to my laptop, they're powered from a surge protector, I use them daily, and I power them down when I know I will not be using them for extended periods of time (going to work, vacation).
If you want to deal with AVID/M-audio support on the phone, they require you to buy a 14.95 code for an incident. Supposedly they gave these codes to people who registered their products and it's good for one year. If history is of any indicator, your speakers purchased from them will die after the 1 year warranty of moderate usage. Based on what other reviewers and forums have said, it's more cost effective to buy a new pair of speakers (cost of the incident ticket, shipping to and from factory, and hourly labor charge for fixing the speakers).
I have no idea how the 2nd revision of these speakers are. Hopefully they keep the sound quality and fix build quality. But for now, I've sworn off this brand as intolerable garbage, as I'm 2 for 2 in bad units from this brand. Speakers really should last longer than a year and a half.
*Note: Taken from my Amazon.com review