Your analogy is excellent. I'll have to rethink that one over. :)
-- "I\'m never wrong, once i thought i was, but was mistaken" Real Programmers Do things like this. http://webpages.charter.net/jamie_5
-- Nice :-) Even neglecting Asimov\'s rules, as I recall them, the primary directive was self-destruction (or, at least, neutralization) of the robot when a logical quandary was reached which would lead to the loss of human life in favor of a robot\'s "life".
Maybe all but the Marantz has a DC offset voltage showing up at the output.
Excuse this guys, but what you now wrote, made me go mad. I KNOW HOW to use a multimeter and I KNOW what is AC. Please, don't make a monkey of me.
You all seem to be ignoring the fact, that even the soundcard didn't register *any* voltage at its line input, be it distorted/clipped or not.
Are you still going to tell me, to check if my DMM is set to AC?!
I've told you all, that DMM *is* in the mode and in fact, I have measured a p-p voltage of my cd player line out without any problems.
Apart from that, you have grossly gone offtopic. Sorry, but you were helpful in the beginning, now you are telling bs.
There is no point drawing ascii diagram, as this is a simple voltage divider.
I doubt any of my amps have an offset of 10+ volts...
(snip)
You did that yourself by totally ignoring, even rebuffing, the good advice you were given.
You have now shown, a good old method, to make a brainwash out of people who ask the question, the moment when you don't know the correct answer. That is, when you fear to admit it.
The method is - To persuade somebody, that he/she doesn't know what he/she is doing. And then let him/her go away and stop asking.
D> You did that yourself by totally ignoring, even rebuffing, the good advice
What is it I fear to admit? See if you can be at least a little clear on this.
Well, let's see....
What is you opinion of what is the problem?
Thanks for that. I too found the inherent contradiction in Jamie's sig deeply perplexing. I'll sleep well tonight for the first time in weeks. Well, as soon as I find out what all those damn chickens were doing crossing the road. I find the provided explanations somewhat implausible.
Tim
advice
So far so good. The indications are that the OP has a meter that works and he knows how to use it. The question that needs to be addressed is how he gets the results that he gets without immediately assuming that he is a cretin.
I wonder whether he has measured the output from the amplifier with the speaker disconnected or with a resistor connected in its place.
Has he measured the voltage between each of the speaker inputs and ground?
R
DMM's (most of them) do not respond high frequency AC. some only go up to 400 Hz. or so. others more, it depends on your DMM.
-- "I\'m never wrong, once i thought i was, but was mistaken" Real Programmers Do things like this. http://webpages.charter.net/jamie_5
Fine, figure it out for yourself or publish your zero point energy results.
It appears as if Daniel is not getting any better results from his own native language speaking respondents...
there seems to be a fair amount of ? being asked, but unfortunately the various on-line Polish - English translators don't recognise many of the words so I can't tell much from what is being said. Marantz SR4600 is unmistakable though...
There is something strange.I again have played with measurements today. There is voltage across speaker terminals, but begins to show up from
-15dB volume setting! and It is way too small!
There is just 2VAC with volume at -10dB! (with max being +18dB and min. -71dB) Without *any* voltage divider on the way, just plain speaker terminals.
I just don't understand... this is way more powerful amp than that... And it is not a dmm's fault, as I've hooked it up to the soundcard and it *barely* sensed a voltage across line in (too low for RightMark Analyzer to work and I don't believe it is accurate enough to amplify the signal with some audio software...).
What is the signal you are using? Try a simple 60Hz tone to avoid running into frequency response limitations of the DMM.
I'm using RMAA calibration signal.I've just also tested 60Hz, as you instructed.Results:
-15dB: 5,5 VAC
-10dB: 10,5 VAC
-5dB: 19 VAC
-4dB: 21 VAC
Hmm... seems like amp's logarythmic volume slope is very soft...
What do you think about it?
I'm afraid that I'm not familiar with the expected curve for audio equipment (it must depend upon the actual sensitivity of the human ear with respect to audio power, which is probably not an entirely perfect logarithmic curve). Maybe a web search will turn up something?
Daniel, can you re-create the setup you had when you first posted?
You said you heard a sound from the speaker, but you couldn't measure any signal at the speaker terminals.
If you have that situation again, place a short circuit across the speaker terminals with a heavy piece of copper wire. If the sound goes away, or is greatly reduced, then the inescapable conclusion is that there
*is* a signal there, but you have a measurement problem.
any
Nasty.
Indeed :-) But I think I can live with what I have now.I've done a measure and I think we can abandon the topic.Thank you all who were kind to me.
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