Did you have any luck contacting FiiO tech support? How long does it usually take for them to reply?

Yeah, tried that already. But thanks for the suggestion.

Hi, My BTR7 came with firmware 1.69 and I'm trying to upgrade it to the latest 1.71 version. Unfortunately, the upgrade process gets stuck on 0.0% and then fails. I tried both online and local methods, and different Android devices. Did anyone else here encountered this issue?

Is the stand base made from real wood or is it a painted polymer?

I'm really interested in purchasing this headphone, but early Hifiman are infamous for driver failure. I mean, there's a reason so few of these survived and still working today. Do you know if Hifiman will service this HE6 when it finally gives up its ghost, or is this risk of driver failure...

I'm really digging this deep blue colour! Is it the same tuning as the pearl white ones? Any dings or scratches? Can you send me more photos of these earcups?

This green headphone looks amazing! GLWS

Wax will add this shiny gloss to the wood, but I doubt it will remove any surface scratches.

Yeah, I did search for TH500RP cups... these things are made from unobtanium. However, speaker grills from AliExpress also fit: https://www.aliexpress.com/item/32926398895.html (I don't recall the size, but it's easy to measure). Since then I also acquired a TH-909. The open-back modded TH-X00...

Sadly, I have the same issue with small scuff marks on my W5000. Is there a good method to buff the clear coat and remove scuffs without damaging the wood itself?

I've purchased my DT1990s from Amazon.co.uk. They were sold as "Brand New". However, one of the earpads is marked with a blue marker on its inner side. Did anyone else receive a marked earpad with their DT1990 or was I sent a used unit?

I've purchased my DT1770s from Amazon.co.uk. They were sold as "Brand New". However, one of the earpads is marked with a black marker on its inner side. Did anyone else receive a marked earpad with their DT1770 or was I sent a used unit?

My OCD kicked in when I noticed that black YAXI stPad2 pads have the stitching on the same side. When wearing the pads with the Antarctica material on the back side, the right pad has the stitching on the bottom while the left pad has the stitching on the top. If you have black YAXI stPad2 pads...

I realize this is an old comment, but I wonder if now in 2020 there is an app or another way to do so?

Thanks, but it doesn't sound like you actually looked inside the headphone. There are some folks on this forum who modified it and are very familiar with it. I was hoping to hear if they found a serial number anywhere...