Just quickly did some calculations using an excel sheet from http://www.apexhifi.com/specs.html
Please correct me if my maths/use of specifications are wrong (DT880 600ohm + DX90 on High gain)
Seems like at maximum power from DX90, we can acheive 107dBSPL on the DT880 600ohm?
That is correct if we assumed @ 600Ohm load the DX90 has constant voltage of 2.8V which iBasso rated as maximum output V at 32 Ohm load.
Still that is the maximum level (theoretical) you can get for DT880. If you are used to listening at very low volume level maybe that will be ok but it will definitely not enough for music with high dynamic range like classical or some acoustics. Soft passages might not be audible and pop/rock music might sound anemic.
I have a Beyerdynamic T1 which @ 102 dB/W plays very loud for most of the music I tried. My volume range starts from 240 all the way to 255. I usually listen at a slightly louder than usual volume (at least compared to a few of my friends listening to the same tracks). However, for classical music, it stays at 255. Which for me is just enough.
You can shoot a mail to iBasso just to confirm the max voltage/power DX90 can put out for a 600 Ohm load.
Just received my dt880. I'm using it on high gain and 190-220 volume levels.. And I find that's loud enough.. Wouldn't 240-255 cause some hearing dmg no?
It seems like line out at 220 is also good enough in terms of volume.
Finding that Dt880 is really unforgiving to poor records.. Put that together with dx90's separation and clarity.. Some of the tracks I got.. Let's just say they won't be listened to regularly.. Have to say the dt880 live up to the credits people have given it in classical music, quite magical.