Axiom Home Page Forums General Discussion Technical Questions Denon 2805 and monoblocks?

John: I guess that I wasn't clear. I am aware of the mathematical definition of RMS. What I was intending to say was that the FTC does NOT require that all channels be measured simultaneously, as opposed, to an RMS rating of ALL channels tested simultaneously. And, the Denon has the FTC spec, as required.

I still have to wonder how realistic that FTC spec is? Just can't seem to find any of the information that the manufacturers used to convince the FTC that ALL simultaneously was not a realistic requirement.

We have a lot of folks reporting improvements when they go to separate or additional amplifiers. Of course, we are not talking about double blind tests. But, if they really are noticing a difference, I would have to "assume" that their current gear is somehow power limiting. If true, it would imply that the FTC ratings are not sufficient.

The curious side of me wonders what is ground truth????

Sir: what you are "hinting" at is an integrated power spectrum rating. That is probably a little too complicated for many to understand.

Just consider all that don't understand that speaker wire is fully characterized by its RLC parameters!!

No, I don't want to go there, again.

LOL!!

I don’t know if that assumption is correct or not. I can’t honestly say if the improvements I had are from the amp or the processor sending the signal to the amp. I’m guessing a little bit of both. I think once you get to a certain point in current supply, adding more does you no good. However, the quality of that power will definitely make a difference. As will how the source signal is sent to the amp.

At any rate, I most definately notices a difference. Enough to where a blindfold wasn't required.

Even my wife from the other room asked. "What's different about the stereo?"

I asked. "What do you mean?"

"Sounds better." Came the reply.

Then I told her I spent another $900.

I wish you hadn't said that. Now we're all gonna have to get bigger amps...

In reply to:

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But, if they really are noticing a difference, I would have to "assume" that their current gear is somehow power limiting. If true, it would imply that the FTC ratings are not sufficient.

The curious side of me wonders what is ground truth????

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Rat, you are looking for an answer when a disparity in the information does not exist because of the fundamental difference in the type of information that is being paired. You cannot try to correlate such subjective reports on sound improvement while attempting to associate the answer with power and FTC spec requirements. It won't work.
What will end up happening is that you will continue to scratch your head figuring out why people report a sonic difference b/w SS amps if there appears to be no reasoning as associated with FTC regulations/restrictions/requirements.
There is a huge leap of faith that the original assumption the subjective reports are 100% true and without flaw.
Audio is a religion to many. Sometimes they don't want a search for answers as to why and the reality is, there may not be any. The cliche "to each his own" could apply thousands of times over for every subjective report you read and believe without doubt.

Chess: what you say is only somewhat correct. I started out my question with an "IF!" I fully realize that most of the comments are NOT objective. That does not, however, mean that they are necessarily wrong. We need more information at this point in time to ascetain "ground truth."

I TOTALLY agree with your statement that audio is a religion to some. I just can not believe the number of chalatans out there and the beliefs of some are as wrong as you can technically get.

Perhaps I should restate my question.

Do some of the current receivers power limit or show increased distortion because they are not rated for full power in all channels simultaneously?

I think that is really what I am trying to ask (and it is nice and simple), and it gets away from all the quandry of the FTC specification. I would like to upgrade my receiver to separates, but I don't find anything on the market, currently, that I would purchase. I do like the new Denon 4806.

Bernard, it would appear that the answer to your question would be no, except if the unit in question was actually called upon to operate at full power in all channels simultaneously for a period longer than it was capable of doing so(not necessarily the five minutes that's required if an all channels driven rating under the FTC reg was given by the manufacturer). Since this situation can be duplicated in the testing lab, but isn't a realistic scenario in home use, it doesn't appear to be something which should be a matter of great concern.

Rat,

I really do think the forum needs your review of the 4806.