[jamato8]

Quote:

Originally Posted by itsborken /img/forum/go_quote.gif Glad I asked about the 627. The current would have hurt. The browndog actually has two chips soldered on; does that mean they are stacking them or that they have them wired for two channel? If the bass is clearing up too that would be a bonus. Without searching the thread, are you running stock or rolling opamps too? How many hours are you up to on the D1? Once you get your proline 750s we'll have a common frame of reference at least. Hope you enjoy them as much as I do.

I have the AD8066 in as the dual opamp and AD8397's as the two output buffers. Ron really likes the OPA2111 in the opamp postion. I hope to hear this soon and I don't doubt his ears.

Yes if your 627's are on the BD adapter that has one on top and one underneath then it is now a dual but it will have some current draw.

 

[itsborken]

Quote:

Originally Posted by jamato8 /img/forum/go_quote.gif I have the AD8066 in as the dual opamp and AD8397's as the two output buffers. Yes if your 627's are on the BD adapter that has one on top and one underneath then it is now a dual but it will have some current draw.

Thanks for the info; I'll tuck those 627s away for some other project.

 

[Dexdexter]

Quote:

Originally Posted by jonesy /img/forum/go_quote.gif The unit carries on playing fine. the blue led stays on for a few minutes then goes off then back on for a while. I am burning in at the moment - there's no change in configuration that coincides with the blue led on/off.

Until you hear back from iBasso, maybe try leaving the unit connected to the AC adapter and see if the blinking doesn't somehow resolve itself.

 

[jonesy]

Quote:

Originally Posted by Dexdexter /img/forum/go_quote.gif Until you hear back from iBasso, maybe try leaving the unit connected to the AC adapter and see if the blinking doesn't somehow resolve itself.

Thanks. Actually I thought I might try to run down the batteries and see if there's any change if I start from scratch. It isn't exactly blinking, by the way - more like 10, 20 minutes at a time - most strange.

 

[winnyec]

Quote:

Originally Posted by itsborken /img/forum/go_quote.gif Thanks for the info; I'll tuck those 627s away for some other project.

Meanwhile I tried to look up the official characteristics, and it seems it shoud add about the same extra current usage as the two NE5532->AD8397 change.

 

[Sisyphos]

Quote:

Originally Posted by jamato8 /img/forum/go_quote.gif I have the AD8066 in as the dual opamp and AD8397's as the two output buffers. Ron really likes the OPA2111 in the opamp postion. I hope to hear this soon and I don't doubt his ears. Yes if your 627's are on the BD adapter that has one on top and one underneath then it is now a dual but it will have some current draw.

I am still waiting for my D1 to arrive but meanwhile I am trying to follow the opamp rolling discussion but that's getting harder.
So please let me try to clarify this to myself:

1. To change the stock AD823 there is no soldering required. You just pull it out and put in an AD8066 (as jamato did) or an OPA2111 (as Ron did), right?

2. If you like either of them you can just leave in the NE5532 buffers, right?

3. But if you want to change the buffers (preferably?) you pull out the two NE5532s and put in two AD8397s - they work with the AD8066 as well as with the OPA2111 and there is no soldering necessary, yes?

Hope someone can clarify this because I don't know anything about electronics - I just want to get the best D1 sound ...

 

[jamato8]

I have around 325 hours on the D1 now and it is opening up nicely, surprisingly so. All areas are improving, much to my delight. I am using the HD650 right now at around 1 oclock, with more than enough volume, maybe a tad too much but it does drive the phones effortlessly. Jackson Browne "sole acoustic", throws excellent depth, with the audience at a normal and pleasing distance. Everything is in front and to the sides rather than all in my head and around and behind me. Notes have good acoustical resonance and the body of the guitar is well represented.

I assume from the way this thing is going that forming of the dac/amp could take 400 plus hours, which doesn't seem unusual any more.

AD8066 > 2 AD8397's. The change in opamps and buffers is not subtle. I would think as the stock opamp and buffers burn-in, there would be some good positive changes as well.

 

[winnyec]

Quote:

Originally Posted by Sisyphos /img/forum/go_quote.gif I am still waiting for my D1 to arrive but meanwhile I am trying to follow the opamp rolling discussion but that's getting harder. So please let me try to clarify this to myself: 1. To change the stock AD823 there is no soldering required. You just pull it out and put in an AD8066 (as jamato did) or an OPA2111 (as Ron did), right? 2. If you like either of them you can just leave in the NE5532 buffers, right? 3. But if you want to change the buffers (preferably?) you pull out the two NE5532s and put in two AD8397s - they work with the AD8066 as well as with the OPA2111 and there is no soldering necessary, yes? Hope someone can clarify this because I don't know anything about electronics - I just want to get the best D1 sound ...

AD8066 and AD8397 are not available in DIP8, only in SOIC8 so they require soldering, but you can get away with the OPA2111 without soldering if you can find one somewhere.

 

[jaspert]

Quote:

Originally Posted by jonesy /img/forum/go_quote.gif Just got mine (two days to Sweden!) and am also having problems with the front blue led. It seems to go on and off at random. However, my charge light turned green almost straight away which made me a bit suspicious. Anyway, I've emailed ibasso to try and find the problem. I hope I don't have to send it back - I love it! Jonesy

Mine came with the battery charged and the front blue LED does not flicker during use.
The charge light turned green after more than an hour or two.
I love mine too and i hope you don't have to send it back.

 

[Sisyphos]

Quote:

Originally Posted by winnyec /img/forum/go_quote.gif AD8066 and AD8397 are not available in DIP8, only in SOIC8 so they require soldering, but you can get away with the OPA2111 without soldering if you can find one somewhere.

Thank you. So if OPA2111 is really this hard to find at the moment is there any other DIP8 op amp that's an improvement over the stock op amp?

 

[jamato8]

The way my D1 is settling in, even though it is not now stock, I would just wait with the stock version and hunt around when you get a different set of opamps then try them. Mine made a jump today, why I am not sure but at 325 hours plus the sound is extremely enjoyable.


I don't think I like this place any longer. I just ordered an iRiver 120 from Ebay. Optical out and in yada, yada and more drain to my wallet. The iRiver and the D1 or Monica II and Reference hopefully will make a nice sounding package.

Does the iRiver 120 work with Mac? and what is Rock Box?

 

[HiFlight]

Quote:

Originally Posted by Sisyphos /img/forum/go_quote.gif I am still waiting for my D1 to arrive but meanwhile I am trying to follow the opamp rolling discussion but that's getting harder. So please let me try to clarify this to myself: 1. To change the stock AD823 there is no soldering required. You just pull it out and put in an AD8066 (as jamato did) or an OPA2111 (as Ron did), right? 2. If you like either of them you can just leave in the NE5532 buffers, right? 3. But if you want to change the buffers (preferably?) you pull out the two NE5532s and put in two AD8397s - they work with the AD8066 as well as with the OPA2111 and there is no soldering necessary, yes? Hope someone can clarify this because I don't know anything about electronics - I just want to get the best D1 sound ...

EXACTLY RIGHT!!!!!!

 

[HiFlight]

Quote:

Originally Posted by Sisyphos /img/forum/go_quote.gif Thank you. So if OPA2111 is really this hard to find at the moment is there any other DIP8 op amp that's an improvement over the stock op amp?

Try the OPA2107. It sounds good also. Similar to the 2111. I don't know the availability of them, but had a couple on hand. You could also try the OP2134 and AD275. They are also PDIP.

For some reason, the OPA2111 paired with the AD8397 buffers really rocks in this amp! The AD8397 did not work nearly as well in the LR opamp position as it does working as dual buffers.

 

[Sieg9198]

Quote:

Originally Posted by jamato8 /img/forum/go_quote.gif The way my D1 is settling in, even though it is not now stock, I would just wait with the stock version and hunt around when you get a different set of opamps then try them. Mine made a jump today, why I am not sure but at 325 hours plus the sound is extremely enjoyable. I don't think I like this place any longer. I just ordered an iRiver 120 from Ebay. Optical out and in yada, yada and more drain to my wallet. The iRiver and the D1 or Monica II and Reference hopefully will make a nice sounding package. Does the iRiver 120 work with Mac? and what is Rock Box?

If I'm not mistaken(not sure though), Rockbox is a firmware that gives you more option with your iRiver 120.(something like EQ, crossfeed, and more audio file format etc)

 

[HeadphoneAddict]

I can already hear a big change in 38 hours of burn in. It is smoother and much less gritty to my ears. I started burn-in 10am yesterday, and then didn't listen for another 12 hours, at which time it needed more time. I've been listening for 2 hours tonight and it definitely is better.

Interestingly, the new ER6i that I tried with the Tomahawk and D1, which sounded raspy with both amps, now sound better after 36 hours of burn-in via the D1. When I first got the ER6i to screw around with, Diana Krall's piano drilled painful holes in my brain.

I was told balanced armature earphones didn't need burn-in, but that doesn't seem to be the case. Even with the 700 hour Tomahawk the ER6i sound improved with some mileage on them, so the improvement isn't from changes in the AMP.