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iBasso D42 "Mamba" with dual dacs! !! Hey Hey! Improved Starting on Page 76 . - Page 74

post #1096 of 1153
That's awesome! I can't wait to plug in my new opamp!


Thanks!
post #1097 of 1153
Two last question....ti is sending me opa1611aid is this the same amp that I keep reading about the opa1611?
And #2 what is mean by burn in and is it the amps that have to burn in?

I just don't want to burn my mamba before I get to enjoy it!!!

Thanks again!

Sorry to bug with the most basic of questions! redface.gif
post #1098 of 1153
I just received my very own D4 and it sounds great!
But....the opamp is soldered in and I didn't want to just plck it out, so I can't put in the opa1611 mad.gif

Anyone who has worked on it can please shed some light? Or do I have to send it to someone to put a tray in the mamaba so I can plug in the other opamp?

Thanks!
post #1099 of 1153

It is opamp rollable...I don't see how it is soldered in....

 

care to share some pictures?
 

Quote:
Originally Posted by Sicilian0 View Post

I just received my very own D4 and it sounds great!
But....the opamp is soldered in and I didn't want to just plck it out, so I can't put in the opa1611 mad.gif

Anyone who has worked on it can please shed some light? Or do I have to send it to someone to put a tray in the mamaba so I can plug in the other opamp?

Thanks!


 

post #1100 of 1153
It looks identical to the pictures on mad wolfs blog listed below.

http://sz55gn.wordpress.com/ibasso-d4-mamba/

I think the pictures you posted are after it was done by hiflight, and there definitely are some changes...
post #1101 of 1153


he didnt do anything...he mailed me the opamps and i swapped them myself. that was after i installed bybass buffers and different oamp. the picture you have is one of soldered bypassbuffers and a dual 2:1 opamp.

 

there arent that many good instructions online...but you can pop off all 3 of those chips, the 2 buffers on the left and the 1 opamp on the right. carefully lift them up and wiggle them out vertically. take the opamp off first since you can get leverage from the right as there isnt much blocking your way. get like a knife or something and slightly pry it up. be very gently. after a little work itll be coming right off and you should be able to pull them out like pulling out a nail from a wall.

 

you cannot have a soldered d4 unless you bought an aftermarket used one that someone soldered. online it advertises rollable opamps, and it should be rollable...

Quote:
Originally Posted by Sicilian0 View Post

It looks identical to the pictures on mad wolfs blog listed below.

http://sz55gn.wordpress.com/ibasso-d4-mamba/

I think the pictures you posted are after it was done by hiflight, and there definitely are some changes...


 

post #1102 of 1153
I really appreciate your patience with me ob this. So the small opamp spider looking thing has 8 legs and they are look like they are soldered onto a tray,

I pry under the black tray that it it sitting on and not under the actual "spider" itself, right?

The opamps are freaking tiny, much much smaller than I was anticipating so I really don't want to yank it off just to find out that i destroyed it since day one....then I will definitely feel useless! biggrin.gif


Thanks again!
post #1103 of 1153
The opa1611 is tiny compared to the LT1355 pictured in your post. I think that's where the confusion is setting in, I ordered the opamp from TI and it's not placed in anything, but acing it's tiny like the size on the opamp that is currently in the mamba!
post #1104 of 1153
The OPA1611 is an SOIC case style opamp and must be soldered to an SOIC-DIP adapter in order to be used in any
iBasso amp as all rollable iBasso amps use DIP sockets.
Edited by HiFlight - 9/17/11 at 5:58am
post #1105 of 1153

also i think it needs to be said that the opa1611 is a single channel opamp,the opa1612 is a dual, so you will need a dual soic to dip8 adapter with 2 x opa1611 soldered onto it to replace the stock opamp if there is only one socket for the gain stage (rather than 2 for the buffers)

post #1106 of 1153
I think it's just easier to buy them than try to fiddle with it myself!
Thanks for the input and will most likely email highlight for prices on the mods!

Thanks!

Chris
post #1107 of 1153

Anyone know if its ok to plug the D4 into a usb hub? From what I understand a hub splits the current between different usb devices; will the D4 become underpowered and cause the SQ to degrade?

post #1108 of 1153
Just an update...finally got my very own top kit from hiflight...the sound with the optional L/R amp tailored for my senns hd 25 is amazing, the craftsmanship is awesome and I highly recommend it for the D4.... Thanks Ron and all the posters for the guidance!

smily_headphones1.gif
post #1109 of 1153

I think I have a problem with my D4, when I use the amp section it works fine, like when I use it out of my phone. But when I use it with my computer using the dac+amp, it makes the bass sound crackly, and overall worse than when using just the amp section. Could it be because my phone has a better dac than the D4? Or does it have to do with clipping and if so how is this solved besides selling it and buying something else?

post #1110 of 1153

The problem has little to do with the D4 and a lot to do with your computer. There are about 500 threads on this very issue over at the Computer Audiophile forums:

 

http://www.computeraudiophile.com/forum

 

If its any consolation, most of us have been there, and the problem sucks.

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