Lurk650
Headphoneus Supremus
Yea when i first got it the firmware was 1.4 i think and i immediately updated to 1.6 because i heard there was an issue with the scroll wheel on older firmwares. I used to run on vol 32 on my im70s and the x1 could last about 6 hrs before dropping one bar of battery. With an amp you will definitely save some battery life but how much i am not too sure because i hate having an amp and the X1 on my pocket. Its kinda bulky
Looks like 1.61 is the latest firmware from February. Yeah size is why I was gonna go for the M3 but no line out made me change my mind