QC is so inconsistant on these! Pads shouldn't vary in depth like that. It will cause sound differences. Slight difference in depth changes loudness levels, and can cause channel imbalance if not similar on both sides.
I have to agree with Silver on this.
Thanks. Since I don’t believe this is affecting sound to my knowledge I’ll probably leave it as is to save the hassle.
Unless, in your experience, having them symmetrical made a difference on your K553
As Silver mentioned above, it can make a difference in the sound. Whether you will notice it probably depends on how sensitive your hearing is. But it can effect the volume, tonality and the seal of the headphone. So the closer the pads are in shape and depth, the better.
If you like the headphones, and their SQ. And they seem to be in good working order otherwise (e.g. no hinge-related issues, or driver imbalances), then I'd suggest replacing the pads or foam inserts via AKG, if that's possible. If you replace the entire headphones for something like this, you could wind up getting a pair with different, and possibly more serious problems than just an issue with the pads. That is certainly another option though.
It's been quite awhile since I bought my K553's. But I believe I went through several different units before I found a pair that I felt had similar pads and sound quality. Since I went through a local dealer (GC) that had a good return policy at the time, that was not a big deal. I've had the K553's for at least 5 years now though, and the pads wore out after less than a year of my heavy usage.
I also replaced the original memory foam inserts with some regular foam inserts that I made myself, because I felt that the memory foam was not providing as reliable a seal. The K371 is very different in design though, with smaller pads, so that may not be an issue on them. The K553 is notorius for seal-related issue because of their strange hinge design, and unusually large headbands.
On my K553's, the pad depth, and the distance from my ears to the drivers did make a noticeable difference in sound. I tried using pads of several different depths... 1/2", 3/4", and 1". And discovered the farther my ear was away from the drivers, the brighter and less bassy they tended to sound.
If the K371 uses the same or similar drivers as the K553 (with some different filtering/damping), then I suspect it would work more or less the same.
By the way, are the pads on these easy to replace? They seem to be installed rather tightly, but someone posted a picture of them on here with different pads so it is possible.
In the K371 vs. K361 review I posted earlier by Zeos, he removed them on both the K371 and K361 in the video. Whether the inserts are easily removable, I don't know. It wasn't that difficult to get them out on my K553's though. He also removed the pads in his original K371 video...
Looks like they're held in place by just a small lip around the edges of the pads.
The cheap pleather material on my K553's pads wore out very quickly btw. If the K371 uses a similar material, then I would be as gentle as possible with them, if you want them to last.
Aftermarket pads are another option. But they will probably also change the sound sig a bit.