Well I received 2 of these new Koralia Evo 1400's today. And felt like sharing some initial thoughts. Hydor has created a powerhead that will arguably will be hard to top considering all things: Price, Style, Size, Controllability, and POWER. Clearly big improvement from their older brothers the original koralias. The New Koralia Evo 1400 These pair of 1400's pack a powerful punch in my 90. I spent hours positioning them in my tank cause they'd blow the substrate wild if they werent positioned just right. Size is absolutely a plus and where on of a few motivations in getting em. The old K's are just too bulky. The new K's still have some size but are significantly smaller. I do have the hooked up to my APEX AC with some wavemaker programs to each of em so they are synced nicely. No noise or chatter on start up. The only sound I hear is my energybar clicking the outlet off. Here are some pics unboxed and pics of size comparison to the old K4's.