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iBasso D42 "Mamba" with dual dacs! !! Hey Hey! Improved Starting on Page 76 . - Page 73

post #1081 of 1153
Quote:
Originally Posted by musedesign View Post

     Quote:


HiFlight,

  Thank you!  Am I correct that Low Gain is Low Impedance (below 300ohm) and High Gain is High Impedance (above 300ohm)?

 

Gain is not related to impedance.  It only affects the output level of the amp.  You could, for instance, have a very low-impedance but extremely low sensitivity that would require the use of high gain, even though the impedance of your phones is quite low.  
 

 

post #1082 of 1153

Would this be a good buy along with the D4?

 

http://www.amazon.com/Tenergy-Charger-Self-discharge-Rechargeable-Batteries/dp/B00461DNTO/ref=cm_cr_pr_product_top

post #1083 of 1153

Sure....why not.

post #1084 of 1153

Ok, I've have my D4 for almost 2 years now.  Sound quality was excellent although I thought the bass was lacking but it might have been my sennheiser hd380 pro headphones.  However I return to this forum looking for another portable amp dac combo because of my struggle with the usb port on my D4.  It has to be a manufacture defect, be prepared to live with it if you buy this unit.  I contacted support but they seemed to think it was the USB cable, it's not.  Though sound quality was excellent, I want to move to a portable unit that is built to last for years, and I want to see if there is anything special about vacuum tubes. 

 

///////////////////---UPDATE---////////////

 

IBasso fixed my the USB port on my D4 without charging me anything other than shipping.  Thank you so much!


Edited by yodoso - 10/3/11 at 11:49pm
post #1085 of 1153

I just got mine today, but the short audio cable it comes with doesn't work... I know this because I have another audio cable and that works with it, does anyone know what's causing this? What are the chances the cable is defective?

post #1086 of 1153
Quote:
Originally Posted by bl4ke360 View Post

I just got mine today, but the short audio cable it comes with doesn't work... I know this because I have another audio cable and that works with it, does anyone know what's causing this? What are the chances the cable is defective?



If you have another cable that works and the short one doesn't the chances that it is defective is about 100%~

 

It is pretty easy to check the continuity through the cable tip, ring and ground with a multimeter. 

 

 

post #1087 of 1153

Alright. So my d4 has always been having issues with the usb-dac, such as plugging it in doesn't fully connect and I have push the plug in until I hear it connect and turn on, and it is just starting to fail me such as disconnecting on its own. I know other users have reported this same problem. No, I do not abuse my d4, though I do use it as a portable amp fairly often. However, it IS advertised to be a portable amp so in no way am I putting it through harsh conditions or anything. I always store it in the leather pouch when not in use. It there anyway to fix this issue? My warranty is out, so sending it back in isn't an option. And I would prefer to not deal with over seas shipping if I can....

post #1088 of 1153

I am using the iBasso D4 with a MacBook Pro and UM3X.  I find the bass with the UM3X a little too much for my taste.  So I have been using Audio Highjack Pro, to reduce the "mid bass hump".

 

MacBook Pro>Pandora>Audio Highjack Pro>USB>iBasso D4>UM3X 

 

My question, if the D4 is plugged into the MacBook through the USB, how can Audio Highjack equalize the sound?  Isn't the DAC of the iBasso converting the sound?

 

Thanks for the help !

post #1089 of 1153
Hello ladies and gents!

New to personal hi fi. My research for decent pair of cans led me to looking for amps to drive them well and that led me here to read 75 posts on the mamba....which I ordered 2 days ago! I hope I am not late to the party?!

I haven't heard it yet but already tryingbto figure out how to swap out the opamp for the opa1611....How addicting is the quest for audio perfection.

You guys are very convincing and appreciate all the knowledge dispersed.

Thanks for the help.

D
post #1090 of 1153

Hi, all... I just bought an iBasso D4 Mamba and I just want to make sure I understand how to use it.

 

If I want to use it as a DAC/Amp combo, then I must connect the D4 to the computer via USB and connect my HD 650 into the "Headphone" out on the D4, right?

 

But if I want to use the D4 solely as a DAC, then I have to plug my headphone (or my tube amp) into the "Aux In/ Out" rather than the "Headphone" out, right?

 

Also, since there is no "on/off" switch on the D4, is it safe to leave it plugged into my laptop continuously? Thanks.


Edited by ITCW - 9/12/11 at 1:37pm
post #1091 of 1153

Yes to everything.

 

The volume bar can be off if you are using it as a DAC only. 

 

Quote:
Originally Posted by ITCW View Post

Hi, all... I just bought an iBasso D4 Mamba and I just want to make sure I understand how to use it.

 

If I want to use it as a DAC/Amp combo, then I must connect the D4 to the computer via USB and connect my HD 650 into the "Headphone" out on the D4, right?

 

But if I want to use the D4 solely as a DAC, then I have to plug my headphone (or my tube amp) into the "Aux In/ Out" rather than the "Headphone" out, right?

 

Also, since there is no "on/off" switch on the D4, is it safe to leave it plugged into my laptop continuously? Thanks.



 

post #1092 of 1153

This thread will celebrate its 1st Anniversary tomorrow, and thats roughly how long I've had my D4. I shall place a couple of candles atop the little guy and light them in honor of its sterling performance under considerable duress. Hell, I might even listen to the thing ! 

post #1093 of 1153
Thread Starter 

Looks like two years and I just realized it was started on my birthday. :^)

post #1094 of 1153
Was reading some posts and mad wolf states the opamp is soldered and not rollable, but the website states that the mamba is?!

Maybe the newest version of the mamba is not soldered in can anyone help with this, I still have not received my mamba and was wondering as I have asked ti for 2 samples of opa1611?!

Will I be able to just pop them in like the p6 or do I need to fine someone to put them in permanently soldered in?!


Thanks for the help!
post #1095 of 1153

They are totally removable and replaceable. Like plugs into an electrical outlet.
 

Quote:
Originally Posted by Sicilian0 View Post

Was reading some posts and mad wolf states the opamp is soldered and not rollable, but the website states that the mamba is?!

Maybe the newest version of the mamba is not soldered in can anyone help with this, I still have not received my mamba and was wondering as I have asked ti for 2 samples of opa1611?!

Will I be able to just pop them in like the p6 or do I need to fine someone to put them in permanently soldered in?!


Thanks for the help!


 

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