i'm using the same setup also... PC>USB spdif converter>Zero DAC>MS-1/senn hd555... didn't notice any noise. I even test the same setup n listen to madman DT990 that day, also haven't notice any noise.

I'd juz put the OPA627, very detail n cristal clear... thumbs up...

hmm?..
let's forget about the noise issue.. what is your review with oem opamp and the setup that same as mine..
my short review after listen these few days, listen to like old vocal chinese song, the song is quite acceptable but the high doesn't shine, mid is weak and mostly covered by bass. listen to rock music, *shake head* channel separation is bad, when to the part that every instruments are beating and all i can say "bising" and not enjoying the music.
as conclusion: i am compromised with the sq, not the sq compromised me. a good sound quality doesn't need to be compromised.

now saving money for marantz cd5001 cd player and try to pair with this dac.

Opamps? i wonder where can i find it? my area is at petaling jaya/subang/sunway pyramid.

Thanks

This post has been edited by Andiboi: Apr 4 2008, 10:32 PM

The stock opamp tends to be sound tubey, the high certainly doesnt shine while mid and bass certainly more dominating, i guess the OPA family opamp certainly not your cup of tea, try the LME49720 I provided along, please do give the ZERO a chance before classify it as an "you compromised" unit, the LME49720 sounds more detail, fast and bass is tight. Maybe you anticipate a RM4k worth of sound in this RM400 unit, i guess that's why you are disappointed

Steve,

You know where I can get those opamp chipset heat sinks? I think I might need some since the LT1361 runs quite warm..

I think you can get it from Moderno, try PM him

one question: do i need to burn in the opamp? i mean if i change the opamp, do i need to burn in again? cause i change to lme49720, and spending few hours to play around the opamp rolling thing(kinda fun), i even put the opa2604 to head amp or the ne5532 to dac.. hahhaa... anyway between lme49720 and opa2604, i found that opa2604 is better than lme49720. cause at same volume which is quite loud, lme49720 hurt my ear and i turn the volume down and for some reason it still hurt my ear. if the answer of my question is yes, how long do i need to burn in the opamp?
i tried put the lme49720 to dac and opa2604 to head amp, i found that at the beginning of the song(i was like WOW, really nice), after awhile i found out that it sound getting worst at the middle of the song.. lol, i wonder why?


steve, i would like have lt1469,lt1364 and lt1361 opamps.
i getting addicted by playing opamps rolling stuff.

"third times of asking: i wish someone could tell me where to buy opamps beside online?"

Thanks

This post has been edited by Andiboi: Apr 4 2008, 11:38 PM

Just try the OPA627 on Browndog.

Now i listen to the music longer, till the song finish instead of jumping the 'fav' songs.

the feeling with OPA627 is quite obvious, so obvious and real that u think u are a step higher.

The bass and high is extended, more background music, giving the extension more depth.

However I feel the extended soundstage is making feel color or less neutral. (stock opamp is more tubelike, the vocal is rich and warm)

more so at certain knocking at guitar and drums. cant seem to hear the knocking coming out.

I just replaced the stock 2604 with browndog. Did I miss something?

site note : Boy, the feeling of this OPA627 is like opium.

opa627 + browndog is way too expensive. >.<!
RM100 if i'm not mistaken.

Hi all,
Since I got few pm about the opa627ap + browndog adapter. I guess is best for me to kick start 3rd Bulk.

I got 11 pcs Browndog adapters already arrived at my hand and ready to ship out. But the opa627ap need to order from my oversea friend. Min 4 units to kick start this bulk. ETA will be 1-2weeks after collected some deposit (RM15) to avoid FFK.
This might be the last bulk if all 11 pcs Browndog adapter finish coz too much hassle for me..

Price will be
Browndog adapter (1 pc) =RM9 (with opamp), RM10 (alone)
Opa627AP (1 pc) = RM45.5
Poslaju fee+handling = RM6

note: 1 complete set will consist 1 Browndog adapter + 2 pcs opamp

Please pm me if U still interested..

1st Bulk order list:


2nd bulk order list:


3rd Bulk order list: (10 Browndog adapter left...grab it before it gone!!)
1) utellme - 1 X Browndog adapter + 2X OPA627AP

This post has been edited by mikelanding: Apr 5 2008, 11:40 PM

Every new opamp need to burn in to reach the peak, around 50 hours it would have almost reach the peak Anyway did you roll the opamp correctly? Every opamp got a small circle on one corner, make you follow the same direction where the default opamp at. Fail to do so may damage your unit, no joking!

Bro, i think you should only try replacing the opamp in DAC section (the big board), unless you got two same opamp then only try to swap the headamp section (small board), imagine your car one side is 15inch wheel while the other side is 16inch wheel, it would be very imbalance, an imbalance setup wouldn't gives you best performance. And a reminder for you guys, only use those double type opamp not single type opamp unless you able to browndog it About the LT opamp, i think those who want should let me know ASAP, so that I could arrange the bulk faster

I could only know the best way to get opamp is order online since i dont quite know where all those component shop and prices here are way overpriced. Bro Andiboi, if you encounter any question, please do seek for reference here first before take action, cos a slight error might damage your ZERO dac, dont be shy, just ask! I will try my best to answer you

This post has been edited by GodLuvSxS: Apr 5 2008, 12:11 AM

you don't need marantz cd5001 to pair with the Zero, any normal DVDP can do the job.

What happens if you mount the opamps in the wrong direction. Will I still get music, or it will be dead silent?

i think the opamp would be burnt.... thats what was told me to when i got my first opamps...."stick it in properly, follow the notch otherwise the opamp will burn"

anyway.. as for the stock opamps...i kinda like them actually....especially with my DT990 which has extended highs and lows....and recessed midrange.

it actually helped to tame the highs on my DT990 abit. though bass was slightly lacking. but the mids were awesome. though yeah..sounds kinda tubey....but not by much imho. so it wasnt so boring listening to metal for me.

but after putting in the 2107, i dont think i can go back to stock opamps. tamed highs, better bass, and a lil recessed mids. i can live with it. excellent soundstage and detail honestly.

now i cant wait for my 2units of 627 to arrive from mike's 2nd bulk. then can plug in to the headamp section

Thanks for the info. So in total you'll have 3 dual OPA627s in your Zero. And you already upgraded yours with better caps/components earlier. I think the upgrades already cost as much as your Zero if not more

Ultimate Extreme Zero DAC/Amp?

Emmm .... I just cant see any LME49720 impression in DAC section after few days of waiting? You guys threw the tissue paper wrap into rubbish bin ade?

Well I tried LME49720 but I dont seem to find any discernable diff. plus i was so eager to try out the OPA627, so cant comment much. do u need to burn in the OPA 627 or not ?

After one day of listening intensively to the LT1361 in the amp section, I changed it to LT1364. I think this will be my final setup for now.

The LT1364 is very close to the LT1361 in everything except for midrange. For most songs, I found it rather lacking at the midrange and after listening for some time, it was fatiguing. LT1364 adds on to the midrange to make listening more natural while preserving the qualities of LT1361.

LT1057 is a no go for me, too much detail is lost in music. Didn't like the LT1469 either, too much of midrange is lost. How about you guys, what setup are you using?

I think every single OPAMP need at least 50 hours of burn in to get around 80% - 90% of the sound

Looks like LT1364 performing quite all round, you should try it at the DAC area

How is like comparing OPA 627 with LT 1364 in the DAC section? Has anyone tried it?

LT1364 x2
LT1361 x2
LT1469 x2

steve, count me in to the opamps bulk. thanks.