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Asus Essence One Headphone Amp/DAC (CeBIT 2011) - Page 99

post #1471 of 3069

Kenion likes to use two of the "hottest" op-amps.

 

Jokes.

 

Tim

post #1472 of 3069

Actually the 49720ha in the lpf is also running very hot.

post #1473 of 3069

I tried the 49720NA in LFP, and they're only warm. never hot.

 

 

 

 

 

 

 

 

 

 

I'm conducting some testing today with my HE-500.

 

Let's see how well it goes.

 

Tim

post #1474 of 3069
Quote:
Originally Posted by cssarrow View Post

Kenion likes to use two of the "hottest" op-amps.

 

Jokes.

 

Tim


Yeah, I'm fine with that. I can hear & feel da heat!

 

 

 

 

Quote:
Originally Posted by cssarrow View Post

I tried the 49720NA in LFP, and they're only warm. never hot.

 

 

 

 

 

Thats not even an E1 anymore...


Edited by Kenion - 2/13/13 at 4:20pm
post #1475 of 3069

Hey hey, don't be mad my Essence One Pokemon involved into Essence Two before yours ok?

 

Tim

post #1476 of 3069
Quote:
Originally Posted by Kenion View Post


Yeah, sadly... however the sound/fidelity in combination with the AD797BR's is outstanding. Never heard so much detail out of my music before.

I tried out my LME49990s with the AD797Bs again. I even equipped the rest of my AD797Bs with decompensation capacitors to run a full AD797B setup. Then went back to OPA627BMs in the LPF and OPA627AUs in the buffer. The 627s just make it sound more relaxed than any other combination. The 627s in those two positions make the LME49990s and the AD797Bs sound like they're trying too hard. Like an overemphasis on detail.

post #1477 of 3069

i found the OPA627 to be overemphasis on clarity.

LME49720NA is like that too, but not nearly "trying" as hard.

 

I guess each has their weaknesses.

 

Tim

post #1478 of 3069
Quote:
Originally Posted by Sk1n5 View Post

I tried out my LME49990s with the AD797Bs again. I even equipped the rest of my AD797Bs with decompensation capacitors to run a full AD797B setup. Then went back to OPA627BMs in the LPF and OPA627AUs in the buffer. The 627s just make it sound more relaxed than any other combination. The 627s in those two positions make the LME49990s and the AD797Bs sound like they're trying too hard. Like an overemphasis on detail.

The OPA627 seems to be a very interesting chip, however, it's quite expensive.

What are the sonical diffrence between the OPA627BM and the OPA627AU and which one operates "safer" inside the E1?

I may try them out.

post #1479 of 3069
Quote:
Originally Posted by Kenion View Post

The OPA627 seems to be a very interesting chip, however, it's quite expensive.

What are the sonical diffrence between the OPA627BM and the OPA627AU and which one operates "safer" inside the E1?

I may try them out.

The BM is a metal can, the AU is not. To my ears the BM is slightly superior in every way to the AU.

post #1480 of 3069

For the record, my Eximus DP1 is using a pair of OPA627AP as buffers, but when rolling blindly it's always a good idea to use the highest grade available in order to overcome any design mismatch in many people's experience.

 

This said, I rolled genuine OPA627BP's blindly in several DAC's and they sounded utterly dark and veiled. I don't think that shelling out on anything more expensive than the AU/AP grade would too wise, and don't get them for cheap from a chinese seller either as 627 is by far the most counterfeit opamp....or maybe from AudioJade if he has them, as he's not the usual ebay con artist IME but still.


Edited by leeperry - 2/13/13 at 5:19pm
post #1481 of 3069
Quote:
Originally Posted by leeperry View Post

For the record, my Eximus DP1 is using a pair of OPA627AP as buffers, but when rolling blindly it's always a good idea to use the highest grade available in order to overcome any design mismatch in many people's experience.

 

This said, I rolled genuine OPA627BP's blindly in several DAC's and they sounded utterly dark and veiled. I don't think that shelling out on anything more expensive than the AU/AP grade would too wise, and don't get them for cheap from a chinese seller either as 627 is by far the most counterfeit opamp....or maybe from AudioJade if he has them, as he's not the usual ebay con artist IME but still.

AudioJade is actually where I got them from. Funny that.

post #1482 of 3069
Quote:
Originally Posted by Sk1n5 View Post

AudioJade is actually where I got them from. Funny that.


Got my AD797's from them too wink.gif

post #1483 of 3069
Quote:
Originally Posted by turokrocks View Post

This is the first E1 muses version unboxing in youtube or video. congrats!!

L3000.gif

post #1484 of 3069

Oh, thats his video? Nice :)

Subbed biggrin.gif

post #1485 of 3069
Quote:
Originally Posted by turokrocks View Post

Plugged my JH16, and I can hear a faint sound at 0 volume. max I can bare is 8:00.

I am 99% sure that there is no gain switch, Asus come on...angry_face.gif. A jumper, but where? at least provide instructions!

Quote:

"Raja explained how the three Essence One versions differ to reflect the price structure of   and  for the Standard, Plus and Muses respectively. "The difference is in the op-amps. The only other minor change is that we included a gain jumper on the Muses Edition. This alters the output voltage for someone who wants to use IEMs which won't require as much gain as over-the-ear designs. Setting that jumper to the alternate position lowers the gain and thus achieves more range over the volume control. The Plus Edition includes 4 x TI-OPA2132PA and 2 x NS-LM4562NA that can be interchanged with the standard NE-5534. The Muses Edition simply has the version 01 Muses by default as the very best we've found. It thus ships with no other op-amps to swap. If a user wanted swap options out of the box, the Plus Edition would be the one. For obvious reasons the Plus includes a screw driver and two IC clamps plus step-by-step instructions and the op-amp guide of our listening impressions. The Muses op-amps are of limited supply and ..."

Wait a minute.... which means Asus is doing false advertising? And that explain why it was never even mentioned in their official website's specs/features and was not included in the manual as well? There was also no "real" illustration shown in reviews etc...kind of skeptical - unless you are able to find that hidden jumper (which shouldn't be hidden anyway).

 

That's very disappointing... I thought the Asus Rep here clarify the muses board was made out of another revision which differ from base/plus version?

 

I seriously hope my above statement is wrong though.... frown.gif

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