Other reviews for these speakers will subjectively tell you that they are loud, and the sound quality is amazing. My contribution to this discussion is this:
The XMI X-Mini Max 2 speakers deliver a good level of sound quality for the price. Each speaker has a 40mm driver in it, which although unable to represent bass, deliver acceptable mid-to-high range frequencies. The skew towards the mid-to-high range means that anything close to a bass tone gets washed out by vocals, or other instruments. This can be partially remedied if your music player has an equaliser, and you rebalance it for small speakers. However, at loud volumes, which these speakers are capable of, the imbalance becomes more acute and the tinny result can be quite painful to listen to.
I have also purchased the XMI X-mini II Mini Speaker for a family member and, unless you need the separation of the stereo channels, the sound-stage produced is at least as good. These are portable speakers, and so if you go for the Mini II's mono speaker then you'll be carrying around half the kit than with the Max 2's. It's also worth noting that the Mini II is less than half the price.
If you're expecting to use these as a set of cheap laptop or PC speakers, then there is one other issue to consider. When plugged in for charging with the speakers on, a low hum of interference is produced. This results in some annoying plug switching, depending on whether you want to charge or listen. I think this may have something to do with the fixed magnets the Max 2 speakers have in their bases, as the same problem does not occur with the Mini II mono-speaker.