Acoustic Elegance AV15

[bose301s 5,000+ posts]

you have NO CLUE what your talking about... its going to measure the signal if its DC.. your talking about a clipped wave, and a meter WILL measure that too, depending on how hard you clipp it...

I'm an EE and I have no clue what I am talking about, good one.

 

[microhaxo 10+ year member]

you have NO CLUE what your talking about... its going to measure the signal if its DC.. your talking about a clipped wave, and a meter WILL measure that too, depending on how hard you clipp it...

What? It will measure the signal Regardless if its AC or DC, I can take my DMM put it on DC and measure an AC signal just fine, it wont be accurate at all but it will still show numbers....

 

[Papermaker85 5,000+ posts]

What? It will measure the signal Regardless if its AC or DC, I can take my DMM put it on DC and measure an AC signal just fine, it wont be accurate at all but it will still show numbers....

take your multimeter put the leads in the wall socket and put it on DC voltage, does it read out? if so you have a shitty meter.. the current doesn't alter in a DC system no way it will measure DC on the ac setting and vice verser..

 

[kendogg 10+ year member]

Keep in mind, papermaker does industrial electrical work for a living, and probably has some of the nicest Fluke meters you can buy.

 

[Papermaker85 5,000+ posts]

I'm an EE and I have no clue what I am talking about, good one.

so what you say is there no difference in a DC signal and AC signal.. dude where ever you went to school, get your money back..... funny that the AC voltage was dead on.. when you clipp the outputs the signals phase is altered very shortly depending on how hard the cli.. YES a good DMM is capible of measuring it clipped hard enough..

 

[John_E_Janowitz 10+ year member]

Years ago I had a Dynaudio 30W100 that would do the same thing that has been described, the cone would "float" out at higher frequencies under high power. This was in a sealed enclosure in the neighborhood of 3 or 4 cu.ft. The problem turned out to be that the foam surround was a bit too porous and was creating a pressure offset of some type. Once I had the unit reconed with a newer style treated foam surround the problem was non-existent.
I realize in this case the enclosure was vented but based on that experience, I believe the problem is attributed to the enclosure in some regard. Not that it is of low quality or anything to that affect, just circumstantial.

Just food for thought.

Issues with surrounds are something to take into account in the design. Originally we sampled some .025" thick santoprene for surrounds and they suffered from "cavitation" or "****-back." There is a pressure difference from the inside of the box to the outside and the surround needs to be stiff enough and thick enough to support this difference. That may be along the lines of what you had seen.

John

 

[John_E_Janowitz 10+ year member]

Regardless of all of this talk, papermaker, if you will please send the woofer back, we will have an answer to all of this soon. The check arrived yesterday and the return label was in there with it. It could have gone back out yesterday or today but according to the tracking information it has not yet. The sooner it gets back, the sooner it can go to Bumpin Buick for the same testing and the sooner we can put all of this to rest. I'll also measure parameters to see how different they are and how much the suspension has gotten softer since it left.

John

 

[bose301s 5,000+ posts]

so what you say is there no difference in a DC signal and AC signal.. dude where ever you went to school, get your money back..... funny that the AC voltage was dead on.. when you clipp the outputs the signals phase is altered very shortly depending on how hard the cli.. YES a good DMM is capible of measuring it clipped hard enough..

No, there is obviously a difference. However I am having a hard time even reading your posts let alone comprehending what you are saying so maybe I am not understanding you correctly.

 

[microhaxo 10+ year member]

I stand corrected, my meter will not measure the AC from my house but it will pick up AC from car AMPS in DC.. I must have a crappy one :| Sperry dm-4100a

 

[Papermaker85 5,000+ posts]

http://www.mymeterstore.com/p1232/fluke_189.php

john im working alot, im off saturday, i assure you it will return... thanks for your excellent CS...

 

[bose301s 5,000+ posts]

http://www.mymeterstore.com/p1232/fluke_189.phpjohn im working alot, im off saturday, i assure you it will return... thanks for your excellent CS...

and i use these almost daily, they ran like $6000-$7000 new.

http://cp.literature.agilent.com/litweb/pdf/54684-97011.pdf

 

[John_E_Janowitz 10+ year member]

http://www.mymeterstore.com/p1232/fluke_189.phpjohn im working alot, im off saturday, i assure you it will return... thanks for your excellent CS...

Ok, no problem. If you want you can always just leave it at the front desk where they delivered it too. I can call UPS and just tell them to pick it up there if it's easier that way. Just let me know.

John

 

[nastyaudioman 10+ year member]

I'm an EE and I have no clue what I am talking about, good one.

I KNOW papermakers background as well.

I don't know you or anything about you, but it is the internet and can claim anything. I split an atom yesterday and cloned a sheep //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif

 

[bose301s 5,000+ posts]

I KNOW papermakers background as well.
I don't know you or anything about you, but it is the internet and can claim anything. I split an atom yesterday and cloned a sheep //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif

//content.invisioncic.com/y282845/emoticons/rolleyes.gif.c1fef805e9d1464d377451cd5bc18bfb.gif

 

[nastyaudioman 10+ year member]

//content.invisioncic.com/y282845/emoticons/rolleyes.gif.c1fef805e9d1464d377451cd5bc18bfb.gif

Exactly.