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JVC HA-S770. First over ear carbon nanotubes headphone. - Page 5

post #61 of 101

My HA-S 770s are according to tracking # as of today in local DPD depo - a mile away from my home - ready for delivery. As they started the journey from France by carrier Collismo, which does not extend to our country, their packages get delivered here by DPD - which has different tracking # system

- leaving me with nothing but to wait. Most probably tomorrow - can't wait !

post #62 of 101
Quote:
Originally Posted by analogsurviver View Post

My HA-S 770s are according to tracking # as of today in local DPD depo - a mile away from my home - ready for delivery. As they started the journey from France by carrier Collismo, which does not extend to our country, their packages get delivered here by DPD - which has different tracking # system

- leaving me with nothing but to wait. Most probably tomorrow - can't wait !

Exciting! Perhaps you can take some shots of the hp's on your melon? atsmile.gif

post #63 of 101
Quote:
Originally Posted by gideonMorrison View Post

Exciting! Perhaps you can take some shots of the hp's on your melon? atsmile.gif

You've got determination to get the pic of hp's on one's melon, I have to give you that !

 

I am afraid you will have to satisfy yourself with the artificial "melon" - kind of shy photographing (myself), probably 2-3 pics/year of me get taken, mostly by others, none by myself. Consider me the first constituting member/chairman of the Headphoneus Anonymous Club :

 

I am ( insert your name here ) and I am addicted to listening to my music on headphones in PRIVACY...

 

(everybody else present) :  Hi, ( they repeat your name ) !!!

 

But that particular  "melon"  is certainly going to prove to be a treat - if not to the eyes, securely to the ears !


Edited by analogsurviver - 12/5/12 at 8:30am
post #64 of 101
Quote:
Originally Posted by analogsurviver View Post

You've got determination to get the pic of hp's on one's melon, I have to give you that !

 

I am afraid you will have to satisfy yourself with the artificial "melon" - kind of shy photographing (myself), probably 2-3 pics/year of me get taken, mostly by others, none by myself. Consider me the first constituting member/chairman of the Headphoneus Anonymous Club :

 

I am ( insert your name here ) and I am addicted to listening to my music on headphones in PRIVACY...

 

(everybody else present) :  Hi, ( they repeat your name ) !!!

 

But that particular  "melon"  is certainly going to prove to be a treat - if not to the eyes, securely to the ears !

Why so anonymous, you look great!

post #65 of 101
Quote:
Originally Posted by gideonMorrison View Post

Why so anonymous, you look great!

LoL !!!

post #66 of 101

Sorry if this is a stupid question, but what exactly is the difference between carbon nanotubes and normal headphones in terms of advantages?

post #67 of 101
Quote:
Originally Posted by blueangel2323 View Post

Sorry if this is a stupid question, but what exactly is the difference between carbon nanotubes and normal headphones in terms of advantages?

Ultra quick reply - CNT are at least two orders of magnitude better in mechanical properties to anything used for membrane in a dynamic headphone driver before. Depends which mechanical property one singles out for comparison, but on average in this two orders of magnitude ballpark. Which means 

that diaphragm behaves in a perfect pistonic motion without breakup higher in frequency than it would if it was made of inferiour material - in plain English, better midrange -  and particularly highs.

 

But the use of CNT in drivers does not automatically make for superb sounding phones. A racing car would be a good analogy; what good is a super strong, light, fast engine with unheard of performance -  fitted to an old chassis with poor suspension ? 


Edited by analogsurviver - 12/6/12 at 9:26am
post #68 of 101

As predicted, yesterday arrived 700  

 

 

 

 

 

 

SNOW  WHITE

 

700

 

 

 

close up in darkness ; blister welded packaging is sturdy and did protect the HPs during transport well, there is one small dent to the blister corner not visible in this photo

 

700

 

 

 .... getting liberated...

 

700

 

 

 FREE at last !

 

700

 

 

 

 

folding requires at least partial extension of the headband

  

700

 

 

 

partially showing driver through earpad

 

700

 

 

 

country of origin; no prize for guessing where it was made

 

700

post #69 of 101
Quote:
Originally Posted by analogsurviver View Post

As predicted, yesterday arrived 700  

 

 

 

 

 

 

SNOW  WHITE

 

700

 

 

 

close up in darkness ; blister welded packaging is sturdy and did protect the HPs during transport well, there is one small dent to the blister corner not visible in this photo

 

700

 

 

 .... getting liberated...

 

700

 

 

 FREE at last !

 

700

 

 

 

 

folding requires at least partial extension of the headband

  

700

 

 

 

partially showing driver through earpad

 

700

 

 

 

country of origin; no prize for guessing where it was made

 

700

I can't wait to hear some impressions!

post #70 of 101

popcorn.gif

post #71 of 101

Hey AnalogDude.... the important question is,. How do they sound compared to the S500????
 

post #72 of 101

I am afraid everybody who are waiting for the impressions regarding spanking new HA-S770 will have to swallow a sour pill that goes by the name of

 

p a t i e n c e .       .  

 

JVC HA-S770 has not been subjected for listening more than establishing the two channels are reasonably equally loud. Besides, I want to test out the method I described for burning in - therefore, this pair does not have more than say 1 hour combined time playing behind. I will make measurements to the best of my current abilities; I do not posess expensive equipment like Tyll Harstens, for example - but those measurements definitely should reveal RELATIVE difference before and after burn in according to my method. Furthermore, I will wait for one week after burn is completed and remeasure them - to establish if the effects of burn in are permanent or they diminish with time, like physical form of athletes after total practice pause of say a month after the peak of the season . I will make recordings to my Korg DSD recorder(s) and files will be eventually made available to those who might be interested in presenting those files in graphical form. Files will of course have date and time when they have been made. Burn in has not been yet subjected to such scrutiny and I want finally to put an end to it. I will try to take photos of square waves at various frequencies from my oscilloscope screen, but given my next to nonexistant photographic experience, have no idea how these might turn out.

 

In one of my previous posts in this thread, I did hint at the fact that HA-S770 might well not be what everybody interested in circumaural carbon nanotubes headphones are waiting for. I have no wish to bury the product I have high expectations for, but echoing thread starter's impressions would be mild representation of what you would actually hear from 770s. Those familiar with HA-S500 - stock HA-S770 after 1 hour does not even know how to light the candle to hold it to the 500s...

 

BUT - and that is an extremely important BUT - 770s are POTENTIALLY far better than anything possible in 500 format. You will have to wait for the measurements after 1 hour, after burn in by my method (48 hours) and after 1 week complete pause after burn to be recorded - only then I will subject the HA-S770s to modification(s) needed in order to improve the SQ.

 

So, now you know the secret word for the next 10 days or so - but I will be posting the materials you will need, so that you can get them by about the right time mod(s) will be published. 

 

I will also make one quick listen/comparison with S500 prior to all the stuff mentioned above to satisfy your curiosity, say half an hour playing max, and will also post subjectiove impresssions after my 48 hour burn in method and after 1 week pause - backed by measurements.


Edited by analogsurviver - 12/7/12 at 4:42am
post #73 of 101

Wo......

 

can't wait.......................

post #74 of 101

Just a quick recap regarding that half an hour listen/comparison which was intended to be with HA-S500s, but turned  out to be more with my modified HA-M750s. Compared to 500 is 770 after one and half an hour bassy, with far less treble, midbass hump and general muddiness in the lower reaches.

 

Just like HA-M750s in stock form - but precision in treble for which CNTs are famous for menages to come trough. Soundstage is - want a better term - mono-ish, something predominantely classical/acoustical music listener as myself would put on his/hers wish list as the last thing thing he or she might wish for. A/B ing against my modified 750s brought a sigh of relief - they are no mono muddy bassy waters, but present everything in much more natural acoustics than say 500s.

They are far from the last possible stage in modding, but something reasonably dedicated head-fier may be able to repeat - and that is kind of good enough vs 500s. Not that terribly good with words, but 500s remind me of some very good mini monitors that have bass that does punch above their size, whereas modified 750/770s remind me of full size full range high quality floorstanders - it more resembles the real thing, not a ( good) scale model.

 

Stock 770s vibrate in the bass regions crazy enough to give me unwanted ear massage again - the whole lower spectrum, where most fundamentals of music lie, is a mess. Like indicated earlier, resonances in earcups are responsible. After taking the initial measurements, I will burn in them for 48 hours and repeat measurements and do some listening.Then, one week of complete pause to check for the longeivity of burn in effects. Everything backed by measurements.

 

After that I will go through entire range with Sinegen generator spaced at the closest possible intervals to see where these resonances occur exactly - and proceed from there on. 

 

One might ask why i did not mention midrange at all - the reason is that if any audio device has bass/midbass so compromised as stock 770s, these do color sound far, far higher up, messing with the midrange; with all that bloat down there, it is next to impossible talking about midrange quality. One thing is for sure - midrange is not recessed.

 

Treble? After an hour and a half playtime, with CNTs - are you kidding? Much too early to say anything conclusive on this front.

post #75 of 101
Thread Starter 
Quote:
Originally Posted by analogsurviver View Post

Just a quick recap regarding that half an hour listen/comparison which was intended to be with HA-S500s, but turned  out to be more with my modified HA-M750s. Compared to 500 is 770 after one and half an hour bassy, with far less treble, midbass hump and general muddiness in the lower reaches.

 

Just like HA-M750s in stock form - but precision in treble for which CNTs are famous for menages to come trough. Soundstage is - want a better term - mono-ish, something predominantely classical/acoustical music listener as myself would put on his/hers wish list as the last thing thing he or she might wish for. A/B ing against my modified 750s brought a sigh of relief - they are no mono muddy bassy waters, but present everything in much more natural acoustics than say 500s.

They are far from the last possible stage in modding, but something reasonably dedicated head-fier may be able to repeat - and that is kind of good enough vs 500s. Not that terribly good with words, but 500s remind me of some very good mini monitors that have bass that does punch above their size, whereas modified 750/770s remind me of full size full range high quality floorstanders - it more resembles the real thing, not a ( good) scale model.

 

Stock 770s vibrate in the bass regions crazy enough to give me unwanted ear massage again - the whole lower spectrum, where most fundamentals of music lie, is a mess. Like indicated earlier, resonances in earcups are responsible. After taking the initial measurements, I will burn in them for 48 hours and repeat measurements and do some listening.Then, one week of complete pause to check for the longeivity of burn in effects. Everything backed by measurements.

 

After that I will go through entire range with Sinegen generator spaced at the closest possible intervals to see where these resonances occur exactly - and proceed from there on. 

 

One might ask why i did not mention midrange at all - the reason is that if any audio device has bass/midbass so compromised as stock 770s, these do color sound far, far higher up, messing with the midrange; with all that bloat down there, it is next to impossible talking about midrange quality. One thing is for sure - midrange is not recessed.

 

Treble? After an hour and a half playtime, with CNTs - are you kidding? Much too early to say anything conclusive on this front.


Resonances and the problems derived from them won't disappear after  burn-in. But I believe that if you were succesuful modding the 750, the S770 shouldn't be a problem at all. Please document all the process so that we the less proficient can follow.

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