I uh.. I may or may not have just spent the last hour or so disassembling my headphones, only to find that there's batteries inside and the earcups just clip off.

Always do the easiest thing first...

> Always do the easiest thing first...

That is how you get an STD.

On a brighter note, I did find that this Sennheiser (HDR 127 for those interested) is actually quite easy to service, and construction is fairly simple and well-built. The headband is a bit annoying since it's a very tight fit and there's several interlocks to worry about. And the screws holding the charging pads in place are extremely tiny. There are 4 types of screws so not too many, and I was able to disassemble the whole thing with just PH0 and PH1 screwdrivers. The batteries were still in good condition. The transmission appears to be comparable to FM radio, although it works at a different frequency range and probably uses a different type of modulation. I wouldn't use it over Bluetooth on devices where I can get away with it, the sound quality simply isn't on par and there's a rather large amount of noise. For my TV on the other hand, this could work quite well :)

this should have a poor design tag.

✅ no indicator of where the batteries are
✅ not in a standard place
✅ hidden entirely from user

meets all the requirements, ship it to prod!

The solution passed all unit tests.

@sariel To be fair, I did not buy this pair of headphones, perhaps it could've been on the box. I don't know to be honest. I opened the headphones under the assumption that it would be a soldered on LiPo pack like you'd find in modern Bluetooth headsets, so finding replaceable AAA batteries inside was a pleasant surprise. Once you know that the earcups can be removed (and that they twist, not pull out) the process is pretty straightforward. These headphones could last a very long time with easy repairs. Just hard to find repair guides since this was part of a series (https://assets.sennheiser.com/globa...).

@Condor sooo RTFM?

Heuuillllee ugly

@mundo03 that's cheating! Reverse engineering it is so much better :P

I managed to get them back together btw, and the noise issues I mentioned earlier are mostly down to a neighbor using the same headphones. When he turns off his transmitter, the sound is pretty crisp. The headphones are very comfortable to wear, to the point that I now consider them my main headphones (especially when paired with an 8TB mediacenter). Well worth the Sennheiser name :)