He's playing flac only n last for 3 hours.  How to replacing the battery, anyone knows or should contact AK for this ?

Guyz, how long ak120 can play flac16bit. My friends told me that his only played for 3 hours. Is that normal?  

yes , you have to turn on the switch to on position.    guyz, how to connect the optical cables to my Z5500 speaker ? can i ?

yeap, i"m agree with you. 1.32 is more sweeter. but i prefered 1.40 for allround...imho

guyz, just wondering is it worth to pair this mamba with ak120? and can i use optical input to my 120?

Just recieved my120 couple days a go n amaze with the sq. i do have the dx90 but 120 is more musical. Wondering which fw with better sq for now? I used 1.40 i guess and one other thing, anyone using er4p with 120? Planning to re bought that iem....

finally i can down to fw 2.0 after using rk batc tool. gonne stay on 2.0 for a while... thanks warth0g n jamato8

hi guyz, why I can not update the firmware to 2.0 from 2.1?  from 2.1 to 2:05 it can be done and there is no problem

Ok, thank you for info...going to try contact westone by an email,

Hai guyz, where i can get w4 standard eartips (whole tips from factory) and is it true the sony hybrid can make sq slightly improve? Sorry for my engllish ...thanks

yeah, i think you were right, w4 doesnt hard to drive. i just trying cmoy to dx90 and the sound was horrible...and what about dac on dx90? coz till now i cant connect it to my pc

haii..can someone tell me good head amp without dac for dx90 in range $100-$120? i am curently using westone 4 for iem