Topic: USB "sound level" difference when using different sources ADI 2 Pro
Hello all, I am not technical at all, so please forgive if I use the wrong wording.
I use my ADI 2 Pro only as DAC / Headphone amplifier, works a dream.
Up until now my source was a FIIO M15 connected to the ADI using a USB cable.
Unfortunately the M15 has WIFI connection problems which results in interupted streaming of music
(We live in the middle of nowhere with a"poor" mobile internet connection.)
In this set-up my maximum volume level for my headphone is -20Db
To end my problems I ordered a latest model IPAD Mini which is now my source.
When I connect the Ipad with the same USB cable, the volume is much louder then when using the FIIO M15.
Now my ax volume is -32 Db..
How is this possible? In my limited technical understanding a USB connection just sends the 1's and 0's...
Also it seems to me, that the sound from the M15 is somewhat cleaner..
Is there anyone who could be so kind as to explain this to me?
I still have the option to return the IPAD, so if for any reason this is a worse option then the FIIO M15 I will do so.