Originally Posted by mastermaybe
Two completely different devices, implementations, and methodologies.
What's "excessively hot"? I'm certain the engineers at Denon and you have very differing definitions
. Until poor heat dissipation is either proven- or at least reasonably assumed- with these units, I'm not going to be running for the hills.
Every computer has at least two running cooling fans; one mounted on top of the processor radiator and another for the power supply.
Every computer server is located in a temperature controlled room not just to keep its temperature cool but constant.
Every commercial airplane has a built in detection/protection system that produces a loud alarm siren while sitting on the ground the second it detects low cooling air flow and shuts down it IRUs processors within minutes if the fault was not corrected.
My 4 year old Acer laptop has a variable speed cooling fan controlled by demand in order to maintain constant processor temperature.
The AVR-4520ci IS a COMPUTER!
I’m not the one who invented this technology.
I’m not claiming I know better than Denon engineers.
As far as I know, no one ever heard the cooling fans on the AVR-4520 run.
If Denon engineers believe their unit doesn’t need constent cooling, then they must know the answer to why so many of their units hardware are failing during the first few weeks, not the mention the ones DOA and the software problems.
I mentioned before I lost confidence in the 4520 design. I’m ready to write it off.
For a receiver that has been only a few months in service, the number of refurbished units on the market is seriously abnormal. Keeping in mind, whether it’s refurbished, A or B stock, it’s still the same design that I believe it was meant to fail sometimes after the warranty expiration but Denon engineers got more than what they bargained for… It’s failing as we speak…
During the past 15 years, I’ve owned many of Denon’s flagships including receivers and other A/V units. I came to expect a lot from them. Unfortunately, I believe they rushed into releasing this new line of receivers counting on their legacy to get away with an unreliable product.
It is true a good part of this thread has become the Wailing Wall for the 4520 but there is a legitimate reason for that.
I for one rather enjoy all the exciting bells and whistles on my 4520 but I’m tired having to unplug and re-plug AC cords, resetting processors and recalibrating knowing I’ll have to twist arms if/when the unit fails completely.
Please don’t shoot the messenger…