im interested in doing this DIY mod but does anyone knows the exact points to solder?
It's kind of hard to tell the directions, isn't it? But the two resistors should be fairly obvious if you open up your ak100 at look closely at it.
You should have used Torx T4 screwdriver. Anyways, why not contact iriver about replacement screws?
I'm just mentioning this, but 22ohm of AK100 doesn't affect every iems. The ones that are likely to be affected are multi BA driver iems that has non linear impedance characteristics. For example, my MDR7550 and H-200 is not affected by the 22ohm, but my UERM is affected. Just owning an iem doesn't mean you should do this mod. So far, I'm very happy with my AK100 unmodded with MDR7550. With UERM, I just use an amp.
Well, can't we just bypass them? Won't that be cleaner than having another resistor?
You can bypass of course but then you either take them out and put in a wire or solder an extra wire in parallel. Replacing the resistor by desoldering it and putting in a 0 OHM resistor is the cleanest way, the way I see it.
I don't own a AK100 and have no idea how easy it is to open it up but it's pretty straightforward.
I have (de)soldered smaller parts.
Sorry to hear that. Did you just added solder on the resistor or used a wire or replaced the resistor with a zero Ohm?
If you just added solder, the risks are bigger because you can easily heat p the whole PCB. By desoldering the original resistor and putting a zero Ohm in its place or adding a wire, those risks are minor.
Sorry to hear that. But at least iRiver decided to fix it.