Head-Fi.org › Forums › Summit-Fi (High-End Audio) › High-end Audio Forum › KOSS ESP-950 Thread
New Posts  All Forums:Forum Nav:

KOSS ESP-950 Thread - Page 69

post #1021 of 1418
Quote:
Originally Posted by milosz View Post



Quote:
Originally Posted by seacard View Post

A $600 electrostat?  That's way too cheap to be considered high end.  In fact, it is only 30.85% as good as an LCD-3.  Now, if Koss raised the price by a couple thousand, I might consider it.  Until then, I'd much rather listen to [note to self: insert name of some mediocre overpriced headphone that people rave over because it is really expensive.]



I think a 35 mm machined billet front panel on the energizer/amp would improve them also....   They should also claim that all the unobtainium used is six nines pure (99.9999 %)*

 

 

*As far as I know, doing a QC assay on "six nines" copper is beyond the abilities of all but a few highly-specialized research labs in the world.  I defy ANY audio cable manufacturer to show me that they are doing NIST-traceable purity assays to prove that all incoming lots of copper wire they use in their cables is truly "six nines OFC."  Also, although some cable manufacturers specify they use "six nines silver" - I do not believe that silver of this purity level is available at all on the market, at any price. It would have to be special made - IF it is even possible- and I don't think that there is even one high-end cable manufacturer out there who is refining his own metal and drawing his own wire.   In my opinion the only thing that is "six nines" purity in these products is the ultra-pure B.S. used in their marketing.

So refreshing to finally read someone cutting thru the BS so prevalent around the topic of cables. +1

post #1022 of 1418
Quote:
Originally Posted by Taowolf51 View Post

Yeah, sorry. I had a guy from Europe steal a pair of IEMs from me here. I got them back in the end (since he scammed at least another dozen people at the same time and they found his address, high school, name, and his local police phone number), but I'm still a bit wary considering I have no control over a package once it leaves the US.

EDIT: If I cannot find a buyer, and you cannot find one being sold for a decent price, I'll let you know, and we may be able to work something out.

That's must be terrible.
Yeah, plenty of bad guys around, maybe it's kind of 'hobby' for them. Proud if they can get something for free
post #1023 of 1418
Quote:
Originally Posted by RedBull View Post


That's must be terrible.
Yeah, plenty of bad guys around, maybe it's kind of 'hobby' for them. Proud if they can get something for free

 

It's funny, that's exactly what happened. He was some kid who came back to brag to everyone how he fooled them (he went off with a few grand in gear). Unfortunately for him, he used the same damn username on all of his other forums, which had personal information that led to his high school (he was on the swim team, I think), and he had all the gear delivered to his parent's house. There was even someone who got scammed by him that was about an hour away from him on work, he said he'd drive over and kick the crap out of him. :p

 

Either way, it was just a dumb kid who made a mistake and got caught. As far as I know, he made everything right for everyone and probably won't try it again.

 

 

Apologies for getting off topic, everyone. :)

post #1024 of 1418

That was Lvrhs, few people I know personally here got scammed by him with the IEM trades.

 

http://www.head-fi.org/a/beware-of-the-following-scams-and-people-abusing-the-classifieds

post #1025 of 1418
Quote:
Originally Posted by Taowolf51 View Post

It raises the price, especially when you have a super lifetime warranty.

 

I do agree, though, I'd love to see an ESP-950 made of some nice strong materials. Or at least an E90 without that damn dual volume knob. :/

 

+1

Hate that thing. I think they put it there because they are so afraid that their cheap amp has channel in-balance due to some un-matched resistor or capacitors. It will help when you can re-balance them using your hand~~~ To me, the unit have five wires and should be balanced in nature, they should just stick with one volume knob with completely balanced sound~~~

Quote:
Originally Posted by RedBull View Post


Where did you get it for 650? I want one.

I got it form amazon.com when they send me flyers when there is discount on hifi headphones~~~~ About a year ago.

Quote:
Originally Posted by RedBull View Post

I dont mind plastic case, but why stax amps can come with metal? are they lower voltage inside?

Maybe because they do not have power supply inside so they do not need the ESP shield from any metal. Normally if you got transformers inside your amp, you need some metal to shield it.

I do not care about the material, but I need it to accept balance input ~~~~~~~

post #1026 of 1418
Lucky you, i have been monitoring amazon.com and always seee it at 950 usd.

Actually, imo, even in the music itself, there's always a chance of imbalance. Some musics the singer tend to be singing on the left, some on the right. I kinda like the option i can always make the singer dead center.

I kinda dumb on electronics, but how can an energizer live without power supply and other have power supply?
post #1027 of 1418
Quote:
Originally Posted by AlanHell View Post

 

+1

Hate that thing. I think they put it there because they are so afraid that their cheap amp has channel in-balance due to some un-matched resistor or capacitors. It will help when you can re-balance them using your hand~~~ To me, the unit have five wires and should be balanced in nature, they should just stick with one volume knob with completely balanced sound~~~

 

You do know this makes less than no sense, right? 

post #1028 of 1418

Typical Head-Fi.

 

But....   what can you expect from an open forum.......

 

That's on of the reasons I like it here....

post #1029 of 1418

We were the first 950 owners in India :D

Don't have it anymore.

Still have the E/90 lying somewhere in the closet but it no longer works :(


Edited by MrTechAgent - 7/21/13 at 9:08am
post #1030 of 1418
Quote:
Originally Posted by spritzer View Post

 

You do know this makes less than no sense, right? 

well, that is just for me. I have no idea what is the actual song should be like when I turn my volume knob~~~~~~ There is no way you can get it perfect each time, so the only thing I can do is to play one track I know it from my heart and adjust it to the level I think is balance. In other new songs, I have to do it with the help of my HD800........ I am not sure how you guys want to hear the music, but for me, I wan to hear as what it is like when it been recorded. I have many many good live classic recordings and I'd like to have the real sound stage information they have offered.

 

Besides, mine is not balanced when the the volume turned together, there are about 5 degree turning angle difference on my amp so I think that is why I hate it and almost want to glue the two together when I turn them~~~~~~

 

P.S.

I have open my unit up and try to stick some DC power inside it using some cell phone batteries. Believe me, the quality of the resistor and capacitor is not good at all. The tolerance alone on the components will be a mismatch for some level~~~~


Edited by AlanHell - 7/21/13 at 9:15am
post #1031 of 1418

http://www.head-fi.org/t/262845/the-koss-esp950-thread-esp-owners-please-contribute/285#post_6208556

 

the blue resistors are 1% metal film - as good as needed for audio

 

the brown body resistors are probably carbon film - but may not be in critical circuit positions

 

the disc Caps again could come in NP0/C0G and be as good as any - others may be hi-K ceramic which may be nonlinear, somewhat piezo

 

so yes Koss didn't just throw premium components everywhere - whether the all of the critical parts are of the better type is a question but they did use some "good" resistors

post #1032 of 1418

jcx is indeed correct, all the crucial parts are good to even great.  The very simple reason why there is the a split volume control, the same as why Stax amps have split volume controls.  Channel imbalance due to bias issues linked to the outside world are a known issue as the sensitivity of one driver can drop, hence the need to adjust that. 

 

Thinking that even 10% resistors would change anything is a a complete fallacy though.  The difference with the transistors is wast which is why the circuits are designed to even that out. 

post #1033 of 1418
Unfortunately, theres no way we can know how the event was recorded, we just have to create our own perceptible sound tone and balance, as much as we pleased
post #1034 of 1418
Quote:
Originally Posted by jcx View Post

http://www.head-fi.org/t/262845/the-koss-esp950-thread-esp-owners-please-contribute/285#post_6208556

 

the blue resistors are 1% metal film - as good as needed for audio

 

the brown body resistors are probably carbon film - but may not be in critical circuit positions

 

the disc Caps again could come in NP0/C0G and be as good as any - others may be hi-K ceramic which may be nonlinear, somewhat piezo

 

so yes Koss didn't just throw premium components everywhere - whether the all of the critical parts are of the better type is a question but they did use some "good" resistors

Thanks for the information. Maybe the channel in-balance is not a result of the component miss-match, but I do get channel in-balance in my amp for sure. I tried my Koss at some ppl's STAXs amp before and it is clearly not from my DAC or Headphone. Maybe because mine is too old(believe made in 1999) so some part of it "wears off"~~~ Still wish they are better made due to the price~~~~

Quote:
Originally Posted by spritzer View Post

jcx is indeed correct, all the crucial parts are good to even great.  The very simple reason why there is the a split volume control, the same as why Stax amps have split volume controls.  Channel imbalance due to bias issues linked to the outside world are a known issue as the sensitivity of one driver can drop, hence the need to adjust that. 

 

Thinking that even 10% resistors would change anything is a a complete fallacy though.  The difference with the transistors is wast which is why the circuits are designed to even that out. 

I am not sure what will cause the bias issue, so please be more specific. With perfectly matched driver and single source, I do not think you can hear any channel imbalance anyway.

I am not an sound engineer and does not know much about how electrostatic drivers, but I do think the reason a lot of people through a lot of time putting very expensive matching component for a reason.

 

I mean, from a logic point of view, everyone can solve the channel imbalance problem cheaply by throwing two volume knobs, right? However, why isn't any one doing it? The easiest way to get good channel separation is to use mono blocks with dual power supplies. But after they do that, why they still try to match them up and just use single volume knob? I mean, putting 2 volume knob for the two mono block will be much much cheaper solution to the problem and they also gives the user the option to choose what they like right? I think it have to be something more than just volume of two different channels. It has got something to do with amp tunnig, sound stage, imaging ability of the unit.

 

I think, most of people in headfi are like me: not a sound engineer and not an specialized sound artiest. So, for most of us,it is almost impossible to tune it perfectly for the recording to sound alive (At least for me, I tried very hard, but with complex classic music, there is not way I can know what sounds right without any reference~~)

 

Hence, my point will be, I wish they just try to do the best to match it up so we do not need to worry about it. If there is imbalance happened because of some signal interference within the signal path, I am pretty sure I have EQ and DAC to fix it before the amp. Just wish they are better made is all my point~~~ ESP950 is a very very good headphone, it deserved a better amp~~~~~


Edited by AlanHell - 7/22/13 at 9:53am
post #1035 of 1418
Quote:
Originally Posted by AlanHell View Post
Hence, my point will be, I wish they just try to do the best to match it up so we do not need to worry about it. If there is imbalance happened because of some signal interference within the signal path, I am pretty sure I have EQ and DAC to fix it before the amp. Just with they are better made is all my point~~~ ESP950 is a very very good headphone, it deserved a better amp~~~~~

 

And that will drive the price up by $300 biggrin.gif

New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: High-end Audio Forum
Head-Fi.org › Forums › Summit-Fi (High-End Audio) › High-end Audio Forum › KOSS ESP-950 Thread