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iBasso D42 "Mamba" with dual dacs! !! Hey Hey! Improved Starting on Page 76 . - Page 30

post #436 of 1153
Okay, major newb here. :O
So , I have an iPod Touch right now as my source , (blah) , and I'm planning on buying a Cowon S9 , and an amp , and this thread caught my attention . I am very interested in buying a D4 now , so would this rig be alright ?

Cowon S9 > D4 > ATH-ES7's ?

And I would use a 3.5mm to 3.5mm interconnector to connect my S9 to the D4 correct ? I just feel kind of overwhelmed by all the information I'm trying to take in at the same time . Thanks to whoever answers my questions .
post #437 of 1153
Cowon S 9 is your choice, you don't need a fancy DAP as all your Sound EQ should be set to 0 on the player for best performance from the Amp, Having said that your portable setup looks really nice

And you will be using a 3.5mm to 3.5mm.
post #438 of 1153
Okay thanks !
EDIT: I did some further reading and some people say that it's not worth interconnecting the S9 and other DAP's through 3.5mm-3.5mm ? What do they mean?
post #439 of 1153
My D4 hast just arrived. Very nice amp, better soundstage than my D3 Python (oob) and very very low iPhone buzz, but one big problem: The two channels have a different loudness because of the pot (although it's by Alps - the haptic is very bad as well btw).
What shall I do (maybe replace the potentiometer with the one of the D3? No nice solution, as the D4 is new!)?

With IEMs I have pretty much noise via USB and powered via battery zero noise (very nice).
post #440 of 1153
Thread Starter 
Quote:
Originally Posted by arctic_storm View Post
My D4 hast just arrived. Very nice amp, better soundstage than my D3 Python (oob) and very very low iPhone buzz, but one big problem: The two channels have a different loudness because of the pot (although it's by Alps - the haptic is very bad as well btw).
What shall I do (maybe replace the potentiometer with the one of the D3? No nice solution, as the D4 is new!)?

With IEMs I have pretty much noise via USB and powered via battery zero noise (very nice).
All you can do then is contact iBasso.
post #441 of 1153
So I will wait, what iBasso says....hopefully I'll have an unproblematic D4 at the end, as the sound is pretty nice - more neutral than the D3 Python, tighter bass and (as already mentioned) wider soundstage. Just nearly too much output power for in-ear monitors.
I'm wondering if anybody has similar problems with USB DAC and amps with in-ears? I think it's pretty strange, that I don't read anywhere something about this. When there'll be no solution for the potentiometer, maybe I should try a Meyer Audio Corda Cantate (which has a negative gain factor)?
post #442 of 1153
im slightly confused with this. is this a "defect" specific to your unit or is it a problem with the model in general? now you have me worried as I just ordered one yesterday.
post #443 of 1153
I hope/think, that the problem is just with my D4 Mamba- if the volume would be on both sites the same in the lower 1/4 everything was just fine. Probably I just got one of the "bad" potentiometers. We'll find it out soon.

On the other hand I'm a bit confused because of my D3 Python, which had pretty much noise at very low volumes. So none of these two amps I own actually are appropriate for in-ears.


Edit: Maybe I could fix the problem, that the volume level is a bit to high in general by swapping the opamps? What models are known to have a low output level? Default opamps are LMH66 55MA or so...
post #444 of 1153
i just order my iBasso D4 Mamba is there anything i shuold no? can i charge Battery when its still in unit? or do i need a separate Battery charger?
post #445 of 1153
You need a separate battery charger. Imo there is nothing special you have to know, just plug in USB and headphones and enjoy. With sensitive headphones you should first turn the device on and then put on the headphones, as there will be a loud "plopp"-noise when switching on.
post #446 of 1153
Quote:
Originally Posted by arctic_storm View Post
My D4 hast just arrived. Very nice amp, better soundstage than my D3 Python (oob) and very very low iPhone buzz, but one big problem: The two channels have a different loudness because of the pot (although it's by Alps - the haptic is very bad as well btw).
What shall I do (maybe replace the potentiometer with the one of the D3? No nice solution, as the D4 is new!)?

With IEMs I have pretty much noise via USB and powered via battery zero noise (very nice).
What IEM's are you using? With noise do you mean hiss? So hiss with USB using Dac/Amp but no hiss with amp only? This is good to know, I'm about to order the D4 and intend to use the amp with Shure 530 and UE TF10. And the same IEM's via USB and Dac from computer. Thanks
post #447 of 1153
Yes I mean hiss. When using it as DAC and Amp USB powered, I do have hiss, but not when powered by battery.
I'm using Compact Monitors Stage 2:
COMPACT MONITORS ||| IN-EAR AND PROTECTION - Stage 2
I don't think they are extremely sensitive for IEMs...
post #448 of 1153
Quote:
Originally Posted by arctic_storm View Post
Yes I mean hiss. When using it as DAC and Amp USB powered, I do have hiss, but not when powered by battery.
I'm using Compact Monitors Stage 2:
COMPACT MONITORS ||| IN-EAR AND PROTECTION - Stage 2
I don't think they are extremely sensitive for IEMs...
i don't get any hiss, and have never heard before this of hiss in D4 the are the most quietest portable amps and IMO one of the best.
post #449 of 1153
Maybe my signal quality of USB power is bad...as already said, battery powered there is absolutely no hiss.

And due to the sensivity I have to correct me. Stage 2 are 122 dB SPL at only 28 Ohm (for comparision: UM3X have 124 dB but 56 Ohm). Maybe this is why these 2 amps sound very loud to me. I asked iBasso, if a higher resistance pot would be possible, if I'll have to send it back.
post #450 of 1153
I'm looking for new DAC/AMP for d2000 and I wonder is there a big diference in SQ between D4 and Compass or DAC_II (using D2000)? I know that this is portable vs. full-size but maybe someone know.
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