Yes, the A52 and A23 both run hotter than I would have expected, even at idle. Actually, the C2 is hotter than I thought, too. Even in standby mode the C2 is like a little heater, the amps are cold. They definitely need the headroom above the units for ventilation. Don’t even think about stacking them on top of each other.
I agree about the appearance of the Anthem products. They scared the crap out of the little lady. She doesn’t share the same affinity for buttons that I do.
As far as Anthem’s HDMI interface, when I spoke with their engineering dept a couple months ago, the feedback I got was that they were not optimistic about the ability to produce a quality result, but they were working at it. Not that Anthem wasn’t capable, but they discovered most manfs of HDMI were not keeping to spec, not all HDMI’s were working with the Anthem upgrade at that time. They said Denon products they evaluated fully comply with HDMI specs. Denon+Anthem HDMI upgrade should be a beautiful thing.
All that Anthem would tell me about the chipset is that it is something normally found only in commercial products, not consumer products.
Also, if you have an Anthem, the cost of that HDMI upgrade is going to blow your socks off!!! Local dealers will be able to do the install so you won’t need to send your pre/pro all the way back to the factor for the h/w. But at $1500 you could get your hands on an external DVDO for less, or even better, you are well on your way to the cost of a Crystalio scaler.
Any difference between the sounds from the Anthem and the Parasound were lost on me, but I didn’t hear them next to each other, either. And as long as I don’t, it will never be an issue. I did hear an Anthem next to an Arcam, the sound of the Arcam was preferred.