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New Portable Amp/Dac: iBasso D1 **with updates on the first page** - Page 92

post #1366 of 2626
Quote:
Originally Posted by MoAv View Post
If one wants to burn in his D1, does pink noise be preferred to normal music ?
Which part of the amp/DAC is being burned in ? the opamps ? the caps ?
I don't think what you play through it really matters. Unlike a headphone there is no driver. Pink noise for HP's is preferred because it really "exercises" the drivers.

The point of burning in an amp is really just to put a signal through it, since the components have never had any signal or music played through them before.

and the parts that are being burned in are... everything! caps, resistors, opamps, ext..
post #1367 of 2626
Thread Starter 


All Black Gates and a Sanyo Oscon in the D1 except for one power cap on the opamp that will also be changed out. I also have some other new images on the first post of this thread.
post #1368 of 2626
Quote:
Originally Posted by Yukon Trooper View Post
Souper how would you say the iBasso is in terms of energy? Does it have lots of PRAT and is it in your face or laid back? What kind of rock do you listen to? How does it compare to the Corda MOVE for rock?
Well I have switched the opamps out to a OP275 so it is a very warm sound signature now which I really like. I would say it's very in your face and laid back when it needs to be. I'm not sure how to describe it. It's just awesome . I like the D1 so much more out of the USB of my laptop than the MOVE. I listen to classic rock, metal without the screaming, indie rock, alternative, pretty much anything with real vocals .
post #1369 of 2626
Quote:
Originally Posted by xnothingpoetic View Post
Pink noise for HP's is preferred because it really "exercises" the drivers.
Why is pink noise better than white noise? White noise is easier to generate, isn't it?
post #1370 of 2626
Thread Starter 
Pink noise is the entire spectrum. It can also overload a system and the volume should not be turned too high for drivers.
post #1371 of 2626
Thread Starter 
I have now replaced the power supply cap for the opamp in the amp section of the D1 with three 47uf HiQ Black Gates. I would like to use more capacitance but these BG's are very fast and I have them in Super E configuration, adds up to almost no inductance, near zero esr and about the best capacitors in the world for this application (I will use larger when I get them what is in there is a 100uf). Since this is the supply for the main opamp of the amp section it is very important for performance in all areas.
post #1372 of 2626
Sounds like you and hiflight should get together with the iBasso people and have them produce a mark 2 version at a higher price as there seems to be a great potential in the basic design.
post #1373 of 2626
Quote:
Originally Posted by Dash View Post
I would say, based off my D1 with stock op amps, it is a slightly forward more aggressive sound. I would not characterize it as harsh, especially after it has about 250 hours on it now. It is not laid back though. Im not saying it sounds like a Hornet, but its style is very remeniscent.

2 cents.
Hornet vs iBasso for rock... which would you consider better?

Also, how would the DAC on the iBasso compare to a modded X-Fi with LM4562 op amps and Black Gate filter capacitor upgrade? And how would the DAC compare to plugging in a Oppo 970HD straight into a standalone amp?
post #1374 of 2626
I just put in he LM4562 (2) buffers with the OPA2111 opamp. Well actually, I did it a couple hours ago, but couldn't stop listening to it. It sounds like a different amp.

The iPod -> ALO LOD -> D1 sounds much better. The iPod finally has a puncy bass with the flat EQ.

Definitely worth the 5 minutes it takes to do it. Took longer to order online from two sites - the OPA2111 from Newark and LM4562 from Digi-Key, than it took to place them.

I also noticed the hiss with my Livewires is gone, though there's still a hum when the AC adaptor is connected.

Thanks, guys, for the recommendations.
post #1375 of 2626
Quote:
Originally Posted by nc8000 View Post
Sounds like you and hiflight should get together with the iBasso people and have them produce a mark 2 version at a higher price as there seems to be a great potential in the basic design.
iBasso people are aware of Head Fi and the posts on the D1. I know because when I emailed them about it they replied and told me they are aware of what has been done here. Whether they come out w/ a new version or not is up to them.
post #1376 of 2626

the weight of the d1.

was going through their website ,it said the weight of the d1 is 800gms ,it did surprise me as if that true i would no way consider it a portable option.
post #1377 of 2626
Quote:
Originally Posted by Yukon Trooper View Post
Hornet vs iBasso for rock... which would you consider better?

Also, how would the DAC on the iBasso compare to a modded X-Fi with LM4562 op amps and Black Gate filter capacitor upgrade? And how would the DAC compare to plugging in a Oppo 970HD straight into a standalone amp?
Apples and Oranges my friend. The D1 is a great amp/source solution. If you are going to utilize the DAC of the D1 then I think its a formidable one two punch. If you are going to utilize an exclusive portable solution with analog out...then I vote Hornet. The Hornet is a great "portable" amp. I find the D1 more in the transportable category amp wise. The DAC rivals my $300-500 dedicated CDPs.
post #1378 of 2626
I've just changed the buffers to 2x 2132. The DAC opamp is also 2132, the
Amp opamp is the 8616, the one originally in the DAC section.

Sibilance is what bothers me most. It is gone, the bass is punchier, there is better silence between notes.

Getting better..

H120 -> iBasso (optical) -> E500
post #1379 of 2626
I wonder how the D1 stacks up against the upcoming Pico.
post #1380 of 2626
Quote:
Originally Posted by roberhofer View Post
I am having similar problems. Plus I can replicate this on two laptops.
One is a Asus V2JE. Pretty new, Vista. When connecting the IBasso via USB everything works initially great. However as soon as I do something that uses graphics (scrolling, switching windows) I get crackling noises. So I connected the IBasso via the Docking Station to see whether this seperates this somewhat. In this case when I have interactions that taxes the graphics subsystem I get dropouts (just as DennyL mentioned) and have to stop the media player (I tried several) and start the song again for IBasso to sync again.

Trying to eliminate the problem I connected the IBasso to a older IBM T22 laptop via USB. It has a fresh install of Windows XP. It connected, Windows detected the IBasso as a USB sound device and played great - till something used the CPU and then the same problem: crackling noises.

This is REALLY annoying: I bought this primarily to get good sound out of my laptop since I spend a lot of time listening to music in this way. And the experience is now anything but better. So till this is solved I am using the Laptop headphone jacks and the IBasso D1 is dormant.

Anyone else who has similar issues? Or is USB Audio simply unreliable? I eliminated Vista (which has a new Sound driver architecture) since the same is true on my T22 Windows XP laptop. Next step is to use SPDIF, however I first need the right cable....
Thanks for everyone who replied to this post. I finally got (optical) SPDIF cables - took a while. And it resolved the USB sound problems that I experienced. So yes - it's either with Windows or the particular Laptop. I tried as well a powered USB hub and it didn't resolve the issue.

So: SPDIF it is. And I am VERY happy , works great, sounds great.
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