So?
No I wasn't talking about overloading at all, just peaks from movies and even music, with high dynamic range. The following links may help if you are interested. No guarantee of accuracy obviously, it is "unofficial" after all but I think it does get us in the ball park. Yes, I picked an extreme case just to illustrate.
I don't agree with either of your statements. For one thing, just to be precise, amplifiers do not have sensitivity per se, consumer amplifiers generally have a fixed gain factor. Personally, I don't like high-gain audio amplifiers (which I'll arbitrarily define as 30-34db) for a variety of reasons, from lowering volume control settings which tends to reduce volume control granularity and performance, to lowering voltage on the line-level interconnects to the amplifier, which increases the likelihood of noise and distortion, which will then be amplified by the 6-8db higher gain factor.
I re-read your original post and didn't see anything about "limit of tolerance..." You did say "Amir tested 8805 at 4V RMS output while the manufacturer’s manual clearly stated that the max output voltage is 2.4V RMS. ", that was false and I thought you subsequently agreed but I guess I misunderstood.
I highly doubt the 3.6 Vrm - 4.2 Vrms are tolerance values. If they are, the data sheet would have said so, and for IC chips, such wide/huge tolerance would be totally unacceptable imo. The difference may be from different test conditions, such as test load impedance, rail voltage etc., but I would be guessing as the datasheet is not clear about it. Regardless, it is irrelevant to our original discussion of whether the specified 1.2 V/2.4 V pre out voltage are "maximum output". I say it is not, based my understanding of the schematics and relevant datasheets, and most importantly, measurements by Gene and Amir. If you still insist those are "maximum" output, we'll just have to agree to disagree.
OK, then it explains the high amount of previously praised in other sources units with low SINAD per Amir’s measurements.
Hmm, how many people out of 1000 have >8000 cuft listening room? 1, may be 2? Is 0.1% or may be 0.2% a “rare exception” or not?
How about this?
Unfortunately the server doesn’t allow me to post links yet. But I believe you will be able to find the datasheet (google for it). You do not need to believe me or not, just look at the datasheet, and if you can read them, you will see. It’s on the page 4 in the section “AC characteristics”.
You can always just put the url in your post (and think there's a thread somewhere just to pump up your post count), then it could be copied & pasted....
True, such as there is no standard definition for the term “rated output voltage”, we can agree or disagree on somebody’s opinion about it. I agree with those engineer’s opinions (google for quora), they are responses for the question about this term. You disagree? That is fine. Use your own definition - whatever it is.
Sometimes they simply mean nominal, like a speaker's impedance rating.
True, when the maximum is defined and described, like in example with Yamaha.
You can assume that, from my experience it is not max at all unless it is specified, nor anywhere near max.
PENG, it would have never occurred to me that a volume control IC would directly drive the pre-out connections, or even drive the internal amplifiers directly. I just assumed there would be op-amp buffers before the connectors or the internal amps. Based on the data sheet, this IC seems to lack the specs you see with most op-amps, like an input impedance spec. Have you seen any schematics that indicate these volume control ICs drive amps or connectors? (Obviously, analog circuit design is not my core expertise.)
Just FYI, PENG is an EE and knows how to read a data sheet. He is also, IMO, one of the most knowledgeable and helpful posters on this site, I've never seen him assert anything without knowing what he's talking about. He's also more of a gentleman than I am. So I think you should stow your sarcasm; he deserves better.
I apologize if anybody feels abused, I didn’t mean it.
I've already read it, which why I'm wondering if the output from this IC is meant to be input for an op-amp.
Per SM of 8805 the outputs of NJU72343 are connected to the unbalanced outputs through 10 uF cap only, no op amps.
I believe this is the best answer to this question: “what is the rated voltage” https://answers.yahoo.com/question/index?qid=20071022211737AAV05Y0
Of course, the 8805 has the HDAM buffer. The Demons and Marantz slimlines don't have HDAMs but likely have some sort of simple buffer stage, but unfortunately the schematics do not show that much details. The block diagrams do show the vol IC connected directly to the internal amps and pre outs. Again, I also think there should be a buffer stage, D&M probably hid the details for proprietary reason. Oddly, they have no trouble showing the HDAM circuitry in great details.
I'd simply rather have specs that are useful. The pre-out voltage spec usually comes with no actual specification as to what it means. Many measure above 4V prior to clipping, tho.
