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Best closed headphones? - Page 3

post #31 of 36
Quote:
Originally Posted by devouringone3 View Post

No need to repeat louder what you already said clearly, I'm not deaf.

Weird, the quote won't grab the rest of your post...confused.gif

Anyways, no it should not go to 32 mega-ohm.
http://www.youtube.com/watch?v=4HvHMIMYbBk (roughly what you're talking about?). Water doesn't out and out resist motion, it just doesn't compress. You can drop a driver in water and it will flap around until it shorts (and the short will be a crossbar and take the ampilfier with it). Adding mass to the cone will modify (stabilize) impedance - it's a form of damping (and it's not uncommon with very large subwoofer designs, and fairly common with passive radiators). Here's a really basic (and exaggerated) simulation for you:

219

219

As you can see, adding 1.5kg to the driver helps to knock down that impedance peak, and it influences driver excursion as well. It will change the FR too:

219

And it makes a lot of other changes to the overall sound of the system (it would probably sound like hell, but there are drivers or PRs that are robust enough to deal with 1.5kg); basically it would "flatten" the response by dealing with the impedance spike and making the driver's response more even, but it introduces issues with group delay (which goes off the plot and is probably what would contribute to it sounding like hell) and maximum output (it can't move as much air due to being weighed down). You can tame the impedance spikes with a Zobel network without limiting your peak output (as long as your component values are high enough), which makes the system more universally similar across sources with different Zsource values (TMK there are only two headphones in the world that do this: the Sony MDR-F1 and MDR-MA900).


More technical and on-topic:
http://www.sound.westhost.com/impedanc.htm

With headphones, this becomes something less of a problem, because good damping isn't impossible to accomplish, and very small drivers with very large motor structures are generally fairly well controlled to begin with (and that's most high quality headphones). TMK the maximum peak power ratings are always thermal limits, not Xmax limits, given that plenty of anecdotal evidence exists for ABSURD amounts of power being dumped into headphones short-term with no apparent damage (hundreds if not thousands of times their nominal operating range - conventional woofers will not survive that kind of abuse).

:EDIT
First reply lacked sim example.
Edited by obobskivich - 5/28/12 at 5:24am
post #32 of 36

x3 pro900...yesss did someone said ...Godsent?!beerchug.gif

 

-1 shure940tongue_smile.gif

 

post #33 of 36

i haven't seen anyone mention the Ultrasone Signature Pros.

Some have taken this to be Ultrasone's best offering yet.

Reportedly not quite the audiophile equal of the Fostex TH900 - which has been

suggested.

But, as per MuppetFace, a discerning poster here, much more suitable to portable

outdoor use.

Suggest you check out MF's discussion of the Signature Pros and her comparison

with the TH900s.

I have and like the Ultrazone Edtion 8s.

But their metallic cups - even the more expensive less shiny version  - would likely be

more of an attention grabber than you might like.

There is, of course, the limited wood cup version - the most expensive of the three models -

which could be a good choice.

Skylab's pick, but I don't know if he wears them outside.

post #34 of 36

I wear them outside on almost a daily basis.cool.gif

post #35 of 36
Quote:
Originally Posted by devouringone3 View Post

 

No need to repeat louder what you already said clearly, I'm not deaf.

 

 

 

 

Classy, elegant, and gracious.

 

I think you take your username a little too seriously.

post #36 of 36

I corrected some thing in my second response to you, that might have been the cause of another misundertanding between us:

 

Quote(devouringone3):

"A low impedance headphone can be a "better" product than a high impedance headphone.

And vice-versa.
That's all I meant." I have re-read your (*editoops: first post) post many times trying to give it more meaning myself, I guess that was my mistake.

 

 

Thanks obobskivich ;) that was helpful


Edited by devouringone3 - 5/30/12 at 10:26am
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