I use MixCube as a mono monitor. It has been setup as a middle-mono speaker, between my Dynaudio BM6. Both speakers go through IK Multimedia ARC2. MixCube looks great. Build quality is amazing. I'm still getting used to mixing in mono. The speakers sound as they supposed to, middrangy, with most of bass energy around 100-200Hz which is good for setting bass levels for media such as iPods, TV, laptops etc. They are really helpful for setting levels. I start the mix with MixCube, set mix levels, and then regarding levels I add compression and basic eq. Then I switch to main monitors for additional adjustments. At the end I check balance on MixCube again and mono compatibility. For me MixCube is essential tool for better mixes.
For what it's worth, the Avantones were very carefully designed, not just thrown together, and seem to elicit very positive reviews in general. I figured out for myself that a mono speaker is actually a pretty affordable option. I seem to prefer the lack of comb filtering and out of phase response you get with a pair of speakers moving around a room. The avantone in mono just seems to sound good no matter where I'm standing in the room. I like the mono compatibility checking property of it as well. The sound quality is very good, even though it's all mids no deep bass or high highs, but, that's the purpose of a speaker like this.
* Ceny zawierają podatek VAT. Do ceny artykułu(ów) należy doliczyć koszty wysyłki. Oferty ważne do wyczerpania zapasów. Za błędy w opisie i innego rodzaju pomyłki nie ponosimy odpowiedzialności. CK=Cena katalogowa produktu