I have an emporor 400, 3 AC 20's, and an AC70. To be honest, I prefer the media that comes with the AC's over the Emperors media, BUT, I like the fact that the lip of the emperor sits lower (closer to the water) than the AC. When dealing with evaporating water, the AC becomes much noisier when the water level drops before the Emperor does. That's not a big deal, but when you have a tank sitting right next to your tv, noise level does have an impact. I have to keep the tank level fuller more often with the AC than for the emperor.
With all that said, the last 3 hob's that I've bought were all AC's... I just really like the media they come with vs. the emperor's media...
But both work well IMO. Just differences of preference, I guess.
With all that said, the last 3 hob's that I've bought were all AC's... I just really like the media they come with vs. the emperor's media...
But both work well IMO. Just differences of preference, I guess.

