Axiom Home Page Forums General Discussion Home Theater Explanation on the Denon 3802/3803/480......

So basically the second possibility i mentioned is what is happening.
The Denon folk are allowing users to run both surrounds off a single amp channel but there is inherent danger in doing this.
As you mention John, running the second set of speakers off this channel will lower the impedance by half which is really going to work the receiver pretty hard. If anyone did not keep to the strict spec of using only 8 ohm speakers in these surround positions, they may begin wondering why the receiver keeps shutting itself down.
Has anyone tried this full 9 speaker config with the QS8s or any other 6 ohm speakers?

The extra surrounds are to allow for multiple setups. DVD-A is encoded with surrounds in the back corner opposite the fronts. Movies, are engineered to make use of speakers to your side and maybe one or two to the rear but center. This allows you to toggle back and forth depending on what you're listening to.

Semi,
I understand that this was the design of the A & B surround options on the Denon receiver but what i could not understand is why they had also included the option to run all at once.
It essentially is hooking up the surround channels in parallel as JohnK mentioned and in my mind, this is really not a recommended option unless the amp is capable of living up the to the task.
It never occurred to me that the Denon engineers had so much faith in their product but now i'm truly impressed.
Still, limiting those two surround speakers to 8 ohm i would think is a strict necessity if they are going to be used simultaneously..

Belatedly...

I've heard that Denon's receiver manuals are badly written. But I am impressed on how confusingly it is presented indeed. The Pioneer manual is better in comparison, although I wouldn't say it is well written, either. No wonder there are very few Japanese universities that provide any formal courses in technical writing.

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No wonder there are very few Japanese universities that provide any formal courses in technical writing.

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Well sushi, perhaps if there are equally few universities in the States that have Japanese technical writing that US made manuals for Japanese electronics sales are also being cursed for their horrible language conversion.