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DX90. 2X Sabre,1st page: Downloads, info&inst. . ! Lurker0 FW Mod link 1st page !!. .NEW FW! 2.3.0 . . . . . - Page 222

post #3316 of 13841

I used to use Intruder with my Phone as a DAC, it had HORRIBLE noise (for me horrible is anything below 90Db, I have bat ears).

 

I was annoyed to pay $800 for stuff that hiss on lowest gain level. Its just riddiculous.

post #3317 of 13841
Quote:
Originally Posted by H20Fidelity View Post
 

Haha, I'm aware of that but felt the need to post pictures anyways. I mean what's not to like about it :D

post #3318 of 13841

BTW. I decided after that to make minified DAC/AMP version by myself based on ES9023 + OPA627 + BUF634, its size is same or less then intruder... sssucks 140mA from the battery but its 30V (+-) based and im still impressed how good it sounds (And I have what to compare, HM901, Ibasso etc.). I realised that voltage and operationals used setup counts a lot, it easily drains my LG G2 in 3-4 hours but sound is impressive.

post #3319 of 13841

They have lots of trouble without making huge, know it all, type assumptions and they also have no problem swapping chips either. I suspect some 'expert' had a hand in hacking the sound of your specific unit. Anything BBE = wrong for me. I've tried it and it only took me further away from the performance even with very subtle adjustments.

post #3320 of 13841

I was thinking on buying DX90 and taking out all of those opa1611 and plugging opa627 instead... but, the problem is that battery operates on 4V !!! And that eliminates plenty of super opamps from use :( Including best of best opa627. This way it would be a super machine, better than HM901 (I must say, HM901 is a bit noisy too!!!).


Edited by piotrekfronc - 4/16/14 at 6:29am
post #3321 of 13841

Chip swaps plus BBE. That's what I look for in a unit never heard.:L3000:

post #3322 of 13841
Quote:
Originally Posted by piotrekfronc View Post

I used to use Intruder with my Phone as a DAC, it had HORRIBLE noise (for me horrible is anything below 90Db, I have bat ears).

I was annoyed to pay $800 for stuff that hiss on lowest gain level. Its just riddiculous.

Not to disagree with your ears, clearly you hear what you hear, but is it possible that your phone was the source of the hiss you heard?

While there are other circuit factors in an amp that can contribute to hiss and/or noise, it is unlikely that it is caused by the OPA1642 (if, in fact, that is the opamp that Ray uses in the Intruder) as it has one of the best noise/distortion figures when compared to other leading audio chips, see excerpt from datasheet below:


The OPA1641, OPA1642, and OPA1644 rail-to-rail
output swing allows increased headroom, making
these devices ideal for use in any audio circuit.
Features include 5.1nV/√Hz noise, low THD+N
(0.00005%), a low input bias current of 2pA, and low
quiescent current of 1.8mA per channel.
post #3323 of 13841

Dammed it wheres my DX90:mad:

post #3324 of 13841

LOL :beyersmile: Anyway, I was experimenting a lot... and ended up with a quite a collection of self made and other's made devices :)

 

When you take out in tube dac+ phone + external battery pack attached.... everyone looks at it constantly :)))

post #3325 of 13841
Mother goose some head-fiers are very gutsy on paper please by all means go take off those surface mount parts but when you'll screw those pcb traces up don't come back to cry and moan about it, I warned ya!

If for some reasons and with divine intervention, you succeeded in swapping those components, please post the photo shots as soon as possible, I am anxious to admire your precise soldering work. beerchug.gif
post #3326 of 13841
Quote:
Originally Posted by nakedtoes View Post
 

Dammed it wheres my DX90:mad:


I feel your pain.

The wait is killing me as well.

 

Shipped on Saturday, April 12, 2014 at 11:56 AM, but no further updates from DHL.

I'm in New Jersey.

Hope to see it before the weekend.

post #3327 of 13841

Hmm, the hiss was showing up on higher volume levels but it was present even with nothing connected in :/ it was verry irritating, because DX100 had absolutely zero noise at any level and I like to turn the volume up. Fact is I use JH16 which are quite sensitive IEMs, but still, wondering "is this noise from recording or just amp" was too much.

 

Dont get me wrong, Intruder plays very nicely, but, at that price I expect certain quality. If me, a noob can go over net learn this and that and compose amp that sounds 3x better and with lesser noise then... I expect professionals working 40 years in industry to do better. Or, maybe i had some QA failed unit ? :( Im not gonna spend again to try it out :)

 

Look at my first prototype from inside:

 

 

 

 

I made it some time ago - this ugly thing is a desktop amp plus tiny DAC using ES9023 packed into a small box - it plays superbly good (my wife said, WOW! when I performed blind testing). Funniest is that you can use galaxy phone with it (or any other OTG), it will drain your battery in few hours of course ;))).

post #3328 of 13841

Ordered on the 2nd hours when launched.. Shipped by the incompetency Fardar got stucked in HK and ibasso reshipped through DHL with tracking only shipping info received 15 hrs ago.. 

post #3329 of 13841
Wednesday, April 16, 2014 Location Time Pieces
16 Arrived at Delivery Facility in ------------------- - UK 11:41

 

ZZZZZ... it probably missed the delivery window..

 

Tomorrow it is.. I hope they deliver nice and early... if not, late in the afternoon.. T_T

 

I sympathise all those who are stuck in even earlier stages of delivery..

post #3330 of 13841
Quote:
Originally Posted by nakedtoes View Post
 

Ordered on the 2nd hours when launched.. Shipped by the incompetency Fardar got stucked in HK and ibasso reshipped through DHL with tracking only shipping info received 15 hrs ago.. 

 

We are on the same boat. I'm afraid our shipment won't get delivered tommorrow. Since it's a holiday on Friday we are lucky to get our DX90 by Saturday, if DHL delivers on Saturday. It looks like we are getting our DX90 by Monday.

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