Ok, this seems like bad karma or something. The right side went silent on my pair.   Stripped the headphones, and checked all the cables and connections. Everything seemed to be fine, and connecting the left driver to the right contacts produced sound fine. (right driver was silent, no...

Ok, if that's the case I don't think there is too much to lose by opening and checking them up. Though I can't think what problem could cause that kind of behavior.   Just a guess, but maybe the cable is broken at some point and moving it causes it to occasionally connect. When they are put...

I'm really surprised that you got two sets that broke in a month. But you should still have warranty from Sennheiser that gives the headphones warranty of 2 years, so I would suggest contacting them first.   If you really want to go at it and try to fix it yourself, you can do it, unless the...

I've been drooling to get a decent pair of headphones for at least a year.   A little while ago I had chance to go to a city that had some audio shops and compare HD600 and HD650, unfortunately it was unamped using my Desire Z. In this manner HD600 sounded a lot clearer and a lot like what I...

  I've been using PXC450 pads for years now with the the rings that they came with. Yes, agreed that it's bit tricky to get them to snap in place, and there might be some slight differences between the products that causes mines to fit.

Quote:   PXC450 Pads are close to original, softer material, more isolating and a little increase in bass amount compared to originals. My personal preference is that they feel lot nicer, though at very hot days can become sweaty, but as far as I remember it's the same with originals.  ...

Quote:   I can confirm this, same happened with a pair my friend owns. He was complaining about getting some strange noises to one of the channels (was later confirmed a bug in sound card drivers). I suggested that we do switch with headphones and did thorough testing. When running...

Quote: Sorry for bit late reply, just had to find time to open up and check those holes on my headphones.   I don't know if Sennheiser has done some other tweaks on those Xense headphones, but at least some of the regular models also don't have those hole sealed, I know mine weren't...

Quote:   One thing that comes to my mind is that the headband is aligned more to front compared to all the other headphones I've used or seen. And actually now when trying to put headband on the center/top of my head headphones seem to be pressing behind my ears that gets really...

Yeah, seems like no worries there, the plastic piece keeping the hinge together seems fine on your pictures. You'll just need to disassemble that side and make sure the hinge is "locked" before you screw it back together.   Here's some pictures that might help understand what you'll need to...

Quote:   There are small claws that clip into plastic ring of the cushions. In order to remove cushions you'll need to pull the ring away from the center/driver and up, then they will come off quite easily.   You can see the claws in this picture marked by arrows. The arrows also...

  Quote: HD555/595 pads will fit perfectly, just like originals. Personally I just don't like the feel of them and use only when I need to hear something outside of the cups.   PXC450 are a bit tricky to put in place. They seem to click in position, but when pulled from correct...

http://www.head-fi.org/t/406187/modding-the-sennheiser-pc350-headset/45#post_5865224   Check out this post by Jaawa and ask again if you're still having difficulties.

Theres two hidden screws behind that cloth (or whatever that is) near the place where cable go into headphones.

Got HD555/595 and PXC450 earpads today.   PXC pad were a bit tight fit, always some of the sides weren't in place, but now I think I've got them fully installed. I have to say, I didn't think that comfortability would be this much better, a bit softer cushions so that the frame of my glasses...

  Quote: I could pretty much blindly recommend these PC350, but I'm not real hi-fi-ear and never listened to anything better than these. Most of my listening experience is based on cheap (under 100€) phones. But there are lot of people on this thread that I think knows the stuff and...

  Quote: Well, this mod is for PC350, not PXC450 so at least I can't give you a step to step guide on that. You can try to read the whole thread, open your headphones and look into if the driver seems similar. There are lot of pictures you can relate to and most of us can probably provide...

Quote: I totally agree with this, the mod give so much more depth to the sound. I had chance to listen unmodded PC350 and I was surprised on how bad they sounded. I had grown used to how my pair sounded that didn't remember how it was originally. Though that pair weren't even burned in I...

I believe the best would be making the holes on side because there is more space for air to move without causing any additional noise.  Then control the amount of bass by adding/removing cotton or some similar material. I've been planning to seal original holes that I made and put new ones...

Another happy PC350 heromodder. It's just amazing that with those little changes these headphones got their quality/price ratio to level that I expected from Sennheiser when I bought them, though as said earlier the mic is superb and that only is worth the money. And thanks to ourfpshero for...