or Connect
Head-Fi.org › Forums › Equipment Forums › Portable Headphone Amps ›  iBasso D42 "Mamba" with dual dacs! !! Hey Hey! Improved Starting on Page 76 .
New Posts  All Forums:Forum Nav:

iBasso D42 "Mamba" with dual dacs! !! Hey Hey! Improved Starting on Page 76 . - Page 65

post #961 of 1153

Hi everybody,

So now I have 2 conflicting opposite statement !

Any other additional votes/experiences to chime in ?

I will email ibasso as well, they might respond.

thank you !

Lionel

post #962 of 1153
Quote:
Originally Posted by HiFlight View Post

Just to clarify further:  

 

If your D4 is connected to USB, you cannot use the amplifier section as a stand-alone amp.  If you plug any source into the Aux In/Out while connected to USB, you will hear nothing, regardless of the position of the power switch!  

 


Well, I am listening to my Ipod with D4 right now and it is connected to USB and the switch is not on Battery but on USB 

post #963 of 1153
Quote:
Originally Posted by HiFlight View Post


 


The D4 will only output the audio from the USB when using the USB input.  The AUX IN/OUT will only output the decoded DAC when plugged to USB cable.  This allows the D4 to be used as a standalone DAC and will draw no power from the battery if the USB position is selected on the battery switch. 

 

 

Quote:
Originally Posted by lionel marechal View Post

Hi there,

Sorry, I am not sure to understand.

Does that mean that if USB isconnected (for power) then the amp will amplify the USB audio and not the line in ?

I am interested in having the possibility of using the amp alone (in usb powered mode).

Thank you

Lionel

 

Quote:
Originally Posted by Yuceka View Post

You can use it as a standalone amp for your portable DAP/PMP without using the batteries. There's a switch on the back of it that says USB and Battery. When you plug it into your computer to use as an amp, NOT as a DAC, you can plug your DAP into AUX IN/OUT. 

 

I was listening to a very long song the other day with my Ipod + D4 and the battery just died. So I just plugged the D4 to my USB and continued listening!


Quote:

Originally Posted by HiFlight View Post

Just to clarify further:  

 

If your D4 is connected to USB, you cannot use the amplifier section as a stand-alone amp.  If you plug any source into the Aux In/Out while connected to USB, you will hear nothing, regardless of the position of the power switch!  

 


Mine is like HiFlight's experience.  If I provide USB power I can only use USB DAC as the input, but not the DAP or iPod.  I must use a 9v battery for power if I want to listen to an iPod.  Applying USB power always changes my D4 analog input jack into the DAC line out.

 

I think the first batch of D4 (like mine) could not use USB power for listening to an iPod.

post #964 of 1153

Oh ok, I didn't know there were differences in different batches, I bought mine about a month (?) ago, I think. 

 

Just to help Lionel better here's what I mean: 

 

IMG_0039.JPGIMG_0040.JPG

post #965 of 1153

Here is a quote from the D4 manual: found here http://www.ibasso.com/download/2010226223657.pdf

 

"When there is a USB signal inputting, the D4 will provide Line Out on the AUX IN/OUT port, at the same time, provide amplified signal on the Headphone jack. If there is an analog signal inputting from the AUX IN/OUT jack, the D4 will work as a standalone headphone amplifier and provide amplified signal on the Headphone jack."

post #966 of 1153

I'm not sure about on the computer, haven't tried it like that.

 

I do on the other hand know that you can power it from the USB and listen to my J3 when I connect it to my PS3.

 

What you would probably have to do is set your computer to another sound card and the D4 will most likely not be transmitting any data and just be powered

by the USB.

 

Hope that helps some and I'm clear enough.

post #967 of 1153

I apologize,  I made a mistake!  When you connect the usb cable to the back of the D4 it will not work as a stand alone amp.

post #968 of 1153
Quote:
Originally Posted by mrarroyo View Post

I apologize,  I made a mistake!  When you connect the usb cable to the back of the D4 it will not work as a stand alone amp.

I don't understand. How come Nanashi and I are able to use D4 as an amp for our Ipod/Cowon when it is connected to a USB source? 
 

post #969 of 1153
Thread Starter 
Quote:
Originally Posted by Yuceka View Post



I don't understand. How come Nanashi and I are able to use D4 as an amp for our Ipod/Cowon when it is connected to a USB source? 
 


Defective? lol

 

Maybe there was a bug in the earlier D4's and later ones accept the input from AUX and then use the amp section only, even when using the USB for power, which would make since. 

post #970 of 1153

Lol ^^^

 

Alright, I just checked my earlier theory, when you change the playback device on your computer (from USB DAC to normal computer speakers or whatever you use) the D4 does

indeed play from the Aux In.

 

If this does not work for anyone else then I guess jamato is right and it does have something to do with the later models. (Got mines recently by the way.)

 

Someone confirm please.

post #971 of 1153

This must be the behavior (no active usb audio on the USB cable would allow to power by usb and amp the aux in).

And maybe the earlier model behaved differently.

 

As a note, ibasso has confirmed that the amp can be used alone, on USB power and amplify the signal from the line in.
 

Thank you for the input in put and experience !

Lionel

post #972 of 1153

just a simple question

does the D10 opamp kit offered by ibasso work with D4?

http://www.ibasso.com/en/products/show.asp?ID=50

post #973 of 1153

Only the ADA4841-2 and the LMH6643 can safely be used with the D4.  The AD8656 and AD8532 cannot be used with 9v. 
 

Quote:
Originally Posted by eroarex View Post

just a simple question

does the D10 opamp kit offered by ibasso work with D4?

http://www.ibasso.com/en/products/show.asp?ID=50

 

 

post #974 of 1153
post #975 of 1153

If you are planning to use the OPA1611 in the D10, you will need to solder 2 of them onto a 2 to1 SOIC to DIP adapter, as they are single-channel only.  If you want a dual channel plug and play, order the OPA1612 in DIP configuration. 


 

Quote:
Originally Posted by eroarex View Post

ty but i already found this in my country, i hope it works 

http://ro.farnell.com/texas-instruments/opa1611aid/audioopamplowpower-noiseprecision/dp/1754264?Ntt=opa1611&isRedirect=true


Edited by HiFlight - 9/29/10 at 8:49am
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: Portable Headphone Amps
Head-Fi.org › Forums › Equipment Forums › Portable Headphone Amps ›  iBasso D42 "Mamba" with dual dacs! !! Hey Hey! Improved Starting on Page 76 .