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Review: iHiFi960 portable DAP and transport - Page 8

post #106 of 142
Thread Starter 

To me, this sounds like a classic case of opamp rolling gone wrong. Just because you think an opamp is "better", and even if the specs bear that out, it won't always be a good fit in a given circuit. 

post #107 of 142

So, Project 86, do you think that the lme 49990 in my player is defective or do you think there is another problem?  My vendor appears to be avoiding me at present, and there's not much impact I can have on China from Texas.  I have emailed the company directly to see if they will take the player back.  I'm still hoping I can get this issue resolved, because I do like the sound of this player (my first defective player appeared to have excellent sound quality, just a bad battery).  I did see on the i-hifi web page (www.i-hifi.com) that they are getting ready to release what appears to be an even newer version of the 960...(release date appears to be 4/10/14, that's April 10.  Thanks.

post #108 of 142
Thread Starter 
Quote:
Originally Posted by jdog View Post
 

So, Project 86, do you think that the lme 49990 in my player is defective or do you think there is another problem?  My vendor appears to be avoiding me at present, and there's not much impact I can have on China from Texas.  I have emailed the company directly to see if they will take the player back.  I'm still hoping I can get this issue resolved, because I do like the sound of this player (my first defective player appeared to have excellent sound quality, just a bad battery).  I did see on the i-hifi web page (www.i-hifi.com) that they are getting ready to release what appears to be an even newer version of the 960...(release date appears to be 4/10/14, that's April 10.  Thanks.

 

 

Dunno... could be a faulty opamp, or a "fake" -  the market for less-than-genuine opamps (and other chips) is pretty large. Or else it could be a real opamp that is oscillating or otherwise unhappy in that circuit. 

post #109 of 142

well, there seem to be others out there with the modified 960 who have had good luck with their players that contain the lme 49990. The newest version of the 960 is supposed to have a dual core set-up with 2 of the lme 49990 opamps....   I wonder if I just have a bad (faulty or otherwise) opamp?  I have ordered some opamps directly from TI (free samples), they are sending me some of the lme 49990 opamps.  If I can't find a way to return my faulty player, I'll have to see if I can find someone who is willing to try to change out the opamp for me...  We'll see what happens.

post #110 of 142
Thread Starter 

Seems like that's your best bet then - have someone swap out the opamps for known-to-be-genuine examples, and see if it clears things up.

 

If that's not it, then it could be some other random assembly issue. Some component or other has a cold solder or something, and it's messing things up. 

post #111 of 142
Have anyone pitted the ihifi960 against the colorfly c4 pro? Issit an upgrade?

And have anyone installed rockbox on the ihifi960
post #112 of 142

Well, I still haven't sorted out my difficulties with my defective modified i-hifi 960, but the vendor is being civil and I think we will be able to reach a final solution that will be acceptable to me soon.  In the meantime, some vendors are now selling the newest version of the i-hifi 960 (dual-core) on ebay.  I lost my will-power and went ahead and bought one of these today (from a different vendor whom I've had really good luck with in the past).  Interestingly, the new dual core player is less expensive (at least for now)  than the two older 960 models.  In any event, I should receive this new player in the next 7 days or so.  I don't have the talent for reviews that Project86 has, but I'll enter my impressions on the player once I've listened to it.  I do know that I really liked the sound quality on the first modified i-hifi 960 player I had (the one with the defective battery), so if the newest model matches this, then I will be quite happy.  

post #113 of 142

Another newer version ? Thank you for the info, and best of luck with resolving the issue.

be nice if they addressed the battery replacement aspect like in the 760, make it easy.


Edited by nick n - 4/18/14 at 9:07pm
post #114 of 142
Wow, another version of the ihifi960? Dual core even.. Dayum.. Anyways, just ordered the colorfly c4, and should arrive in 2 weeks.. Would post my impressions vs my ihifi960
post #115 of 142
Thread Starter 

Hopefully the dual-core brings with it a better UI, since there's more horsepower on tap. Also maybe raise the limit from 16-bit/48kHz. Let us know how it goes!

post #116 of 142

Someone posted a link to the new April release 960, and i saw something else at the bottom, a new model. IHIFI 770 pretty nice looking

 

Notice it says yes software improved on the new latest 960, and also there is an update to the firmware for the 760 / 812v2 / 960 , a Firmware 1.8 i think it said. This looks to fix some small issues like the battery indicator and some other stuff.

 

http://www.head-fi.org/t/715948/new-xuelin-ihifi960-dual-wolfson

 

No idea what the stock firmware I have on the 812 is, how to check?

post #117 of 142

Well, I received the 960 dual-core version 3 days ago; it is a beautiful sounding player.  The music is quite smooth and there is absolutely no background noise at all.  Based on my brief experience so far, it appears that dynamic driver earphones sound a bit better than balanced armature earphones from the headphone out.  However, when I use the line out thru my neco soundlab v2 amp, the BA earphones seem to sound better, much better sound stage and still with completely silent background.  So from a sound quality standpoint, I am very pleased.  But, I must be snake-bit or something.  I am having problems playing music from the microsd slot; the player will play the music on the microsd card just fine (at least for a while), and I have now tried 3 different cards (Kingston, PNY and Patriot).  The problem is that after a bit of time (completely random as far as I can tell), the player seems to go into a freeze and stops playing from the microsd card.  This is not a silent freeze; the freeze is preceded by high-pitched shrieks and the music starts skipping (with shrieks between skips) and then a constant hum follows until I power the player off.  All the cards work flawlessly with my sflo2 and colorfly C3 players, and now I have experienced this problem 5 times with the iHiFi 960 (over about 8-10 hrs of playing time).  I have traded out the cards and reformatted the Kingston card, but the problem has continued.  The player does not do this on any specific song or album, it just seems to be a random problem.  It generally occurs after I have been listening to music on the micro sd card for about 30 to 45 min.  Not only is this very annoying, but I'm afraid that all the shrieking will eventually damage the player in some way. In addition, I am afraid to play music from the micorsd card on the player thru my home stereo system, because I'm worried that it might damage my home system.  I have an email in to the vendor (this is a different vendor than the one I used to buy the modified ihifi 960 from) to try to resolve this problem.   Do any of you have any thoughts, or does it just appear that I have received another defective player?  Thanks.

post #118 of 142
Jdog, my player does the same thing and i mentioned it before albeit it does do it very randomly, sometimes never at all during the day to 1-2 a day
post #119 of 142

So, then is this a common problem with this player? because I have never experienced this with my sflo2 or colorfly c3.  I did have a similar issue with a Sansa Clip +, but after I reformatted the card, the problem has not recurred over the past yr (and I use this player 4-6 hrs a week while doing yardwork).  Aren't you concerned that the sudden noises that occur with this issue will damage the player in some way?  

post #120 of 142

Nick N, 

 

I don't have any experience with the i-Hifi 812 v2 player, but on the i-HiFi 960, you can go to "settings" on the player and find a line that says "system settings".  On the player I just received, the firmware is 1.80 version.  Can you tell me if the 812 v2 has any problems playing thru microsd cards?  Thanks.

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