[24grant24]

Anybody had any success using the audio gd with an android phone, specifically i have the 2014 moto x on android 5.0. I also have a USB otg cable

 

[TeddyK]

  I ordered mine via audiophonics in France off eBay.  What a disaster. 

sorry, i don't understand your phrase.
You buy it on Audiophonics.fr or Ebay ?

 

[chrisc2615]

Audiophonics have their own eBay page, so I ordered it from them, since they advertise a kit which is less than 1/2 the price of an assembled unit.  In the eBay advert there is a picture of the circuit board and all the little extras you get with it.  When it arrived, there was only one of these extras.  Also no wiring or connection diagram.  I have been looking at the connections and tracks on the board and have figured out which are the inputs and outputs.  But the switching is inconsistent.  On the output switch (3 pins) you need to leave them all open to make it output via the DAC out but bridge the other two in turn to change the output to headphone or variable.  Then there is a USB/co-ax/optical switch (also 3 pins).  Here you need to bridge at least two to make any input operate.  Then there is another jumper called High and Low.  If this is bridged, the output jumps from 1.5 volts to 8 volts, severely overloading any amp output.
 
But I have got it to work and am busy burning it in.  Compared to a Schiit Bifrost with USB2 and Uber Analogue, it is warmer and as detailed

 

[TeddyK]

  Audiophonics have their own eBay page, so I ordered it from them, since they advertise a kit which is less than 1/2 the price of an assembled unit. 

Thanks. I didn't know they sell also products on Ebay.

 

[chrisc2615]

Has anyone figured the connections and effect of the filters?  I understand from reading the technical info on Audio GD's website that the 5 pin socket on the board is the filter selection.  By default, the two outer pairs are bridged by jumpers
 
Expert assistance required here please!

 

[chrisc2615]

Found iit! http://www.audio-gd.com/Pro/Headphoneamp/NFB1532/NFB15.32EN_Use.htm

 

[lucianpescaru]

  Found iit! http://www.audio-gd.com/Pro/Headphoneamp/NFB1532/NFB15.32EN_Use.htm

 
IMHO the default setting sounds best...

 

[shadow84]

Just gotten mine, but im curious, whats the difference between variable and fixed output?

 

[Honkytime]

  Just gotten mine, but im curious, whats the difference between variable and fixed output?

its just if you want the volume control knob to control the volume on output,(variable) or the volume set at a preset point and the volume knob does nothing.(fixed)

 

[jaxz]

its just if you want the volume control knob to control the volume on output,(variable) or the volume set at a preset point and the volume knob does nothing.(fixed)

So, it's a true line out or not? Even at fixed level the gain switch works...

 

[Honkytime]

So, it's a true line out or not? Even at fixed level the gain switch works...

it really just changes it so the volume knob so it works or does not work. its more for if you wanted to run another amp after it and not have to adjust the volume control on both amps.

 

[jaxz]

it really just changes it so the volume knob so it works or does not work. its more for if you wanted to run another amp after it and not have to adjust the volume control on both amps.

Yes. I understand that, but I want to know if the line out it's straight from the DAC or really it's a second headphone out because of the variable out (volpot control) and/or gain switch.

Thanks

 

[Matthew720]

Anyone here found a great filter setting for there 400i's? Need help here because I find mine are a little to Bright and my ears hurt after lisening to it for a long time.
Also how do you know what your volume levels in numbers?

 

[hucifer]

  Anyone here found a great filter setting for there 400i's? Need help here because I find mine are a little to Bright and my ears hurt after lisening to it for a long time.
Also how do you know what your volume levels in numbers?

The 400i can get hot and edgy in the treble around 4kHz and 10kHz.

You'd be better off using EQ to drop a few dB at those frequencies than trying to use the DAC filter to correct it.

 

[Matthew720]

 
The 400i can get hot and edgy in the treble around 4kHz and 10kHz.

You'd be better off using EQ to drop a few dB at those frequencies than trying to use the DAC filter to correct it.

Damn, I Really don't like the idea of using an EQ I was hoping the filters could solve all my problems. I don't think I burned in the NFB-15 yet would that have something to do with it?