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iBasso D42 "Mamba" with dual dacs! !! Hey Hey! Improved Starting on Page 76 . - Page 34

post #496 of 1153
Quote:
Originally Posted by gopack87 View Post
I'm really close to ordering one of these from ibasso, but are the rave reviews mainly for the dac section? I would be using it mostly as an amp and with a 7 hr. battery life, I wonder if I'm better off with a Little Dot Mk1+ portable amp....Any thoughts on this?
I would definitely recommend the D4 and the battery life is more like 9 hours using alkaline, get quality amp mate, its just too amazing,I did enough research before getting it.
post #497 of 1153
YES GET ONE
post #498 of 1153

D4 configuration for Line Out and Line In

Unlike the D10, The D4 does not have a detector at the 3.5mm plug line in socket.

To determine if it is using USB to headphone or Line In to headphone it detect if there is a 5V supply connected to the USB, If there is a 5V there the relay is turn on.

So if USB is present it will be configured as
USB source to headphone

if No USB 5V is present it will be configured as Line In amplifier to Headphone.
Regardless if there is any Line in connected to the AMP.

As such it is NOT possible to use USB to power the AMP
and configure line in to headphone.

To use it as an AMP only (without DAC) you Have to use battery.
post #499 of 1153
Can I use Audio GD Moon, Earth or Sun as op-amp?

Edit: Forget it - they seem smaller on the pictures than they are -.-
post #500 of 1153
Quote:
Originally Posted by madwolf View Post
It is 3.7v so need to boost the voltage will reduce the default 470mAH to about 150mAH at 9V which means about 3 or 4 hours battery life. And it might be to big to fit in as it is bigger than a 9V battery.
Not sure if this makes sense, but what I had in mind was 2 batteries connected in series. So voltage will increase (i.e. 3.7V x 2), amperage will not change as there are 2 batteries (not sure abt this).

One possibility is this battery: iPod Video 30/60gb Battery

This is a iPod Video 30/60gb Battery. Its dimensions are 45 x 19 x 4mm, so 2 of them will still take much less space than a 9V battery (dimensions are 48.5 x 26.5 x 17.5 mm). Amperage sounds good.. 480mAh 3.7V.

I suspect that the newer gen nanos and shuffle will have even smaller batteries.
post #501 of 1153
Quote:
Originally Posted by madwolf View Post
As such it is NOT possible to use USB to power the AMP
and configure line in to headphone.

To use it as an AMP only (without DAC) you Have to use battery.
I've used my fuze with D4 powered by USB.
if there was a signal from my computer the sound would get fuzzy switching between both sources, but it did work.
post #502 of 1153
Quote:
Originally Posted by supern0va View Post
Not sure if this makes sense, but what I had in mind was 2 batteries connected in series. So voltage will increase (i.e. 3.7V x 2), amperage will not change as there are 2 batteries (not sure abt this).

One possibility is this battery: iPod Video 30/60gb Battery

This is a iPod Video 30/60gb Battery. Its dimensions are 45 x 19 x 4mm, so 2 of them will still take much less space than a 9V battery (dimensions are 48.5 x 26.5 x 17.5 mm). Amperage sounds good.. 480mAh 3.7V.

I suspect that the newer gen nanos and shuffle will have even smaller batteries.
It would likely work, but what method will you use to recharge them? The D4 contains no recharging circuitry, nor will the USB recharge them.
post #503 of 1153
Quote:
Originally Posted by t0wer View Post
I've used my fuze with D4 powered by USB.
if there was a signal from my computer the sound would get fuzzy switching between both sources, but it did work.
Powered by USB (from computer), or a wallwart with USB plug?

In my case, as I stated before, when I am listening to iPOd via LOD with 9v switched on, and I plug it into my Jabra 5v wallwart, the line input is shut off and the music stops. Switching from 9v to 5v makes no difference.
post #504 of 1153
i have it set to USB, connected to my laptop.
battery or no battery doesn't matter, and line in from my fuze.
post #505 of 1153
Quote:
Originally Posted by HiFlight View Post
Quote:
Originally Posted by supern0va View Post
Not sure if this makes sense, but what I had in mind was 2 batteries connected in series. So voltage will increase (i.e. 3.7V x 2), amperage will not change as there are 2 batteries (not sure abt this).

One possibility is this battery: iPod Video 30/60gb Battery

This is a iPod Video 30/60gb Battery. Its dimensions are 45 x 19 x 4mm, so 2 of them will still take much less space than a 9V battery (dimensions are 48.5 x 26.5 x 17.5 mm). Amperage sounds good.. 480mAh 3.7V.

I suspect that the newer gen nanos and shuffle will have even smaller batteries.
It would likely work, but what method will you use to recharge them? The D4 contains no recharging circuitry, nor will the USB recharge them.
Sorry I'm not really good with circuitry (limited electronics engr knowledge!), but could we not, in theory, have a small recharging circuit connected to the USB? then the USB would be able to recharge the batts. There should be some remaining space based on the size of the batts and the size of the space inside the D4.

Not sure if there's a need for some kind of auto-disconnect function to prevent overcharge.
post #506 of 1153
Quote:
Originally Posted by t0wer View Post
i have it set to USB, connected to my laptop.
battery or no battery doesn't matter, and line in from my fuze.
Weird, mine wont do that. Now, if I partially plug the iPod LOD into the front panel then I can get some sound from the iPod but it doesn't sound right, and then with the LOD plugged into the amp fully then there is no sound until I unplug the USB and flip on the battery.
post #507 of 1153
I just got my D4, and I confirmed that it will power my Cowon S9 and iPod Touch while plugged in via USB with no battery. I just had to disable my USB soundcard. Switch is still set to USB.

This little thing is awesome! I'm even happier now that I know you don't need a battery to power an external DAP if the D4 is plugged in via USB.
post #508 of 1153
Quote:
Originally Posted by dj nellie View Post
I just got my D4, and I confirmed that it will power my Cowon S9 and iPod Touch while plugged in via USB with no battery. I just had to disable my USB soundcard. Switch is still set to USB.

This little thing is awesome! I'm even happier now that I know you don't need a battery to power an external DAP if the D4 is plugged in via USB.
Nice! Seems like this will be in my inventory soon.
post #509 of 1153
could there be a newer version that allows power through USB?
I just got it 2-3 weeks ago.
post #510 of 1153
Anyway, forgot to ask. Is there a HiFlight TopKit for D4? What are the opamps?
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