I got the PX5. Works like a charm for me. Did you set microphone input settings to the PX5 in the PS3 settings?
The sound being horrible might be because your wifi signal is jamming the headset signal. I've read that could happen on a couple of occasions.
Hi, these headphones take a lot of power. If they came with a set of batteries I would throw them and buy new duracells.
In the settings on the ps 3 you have to go to the settings and once set up with mic volume etc you have to go to accesory settings and set them up there as well. Including DUAL OUTPUT.
On the presets try using the last one of the one before that as I remember I think number 7 is best but it is one of the last two anyway. The other settings are for proper sound whores who want to hear foot steps over lots of other things etc.
They are a bit tricky to set up at first but once done theyre great.
Hope that helps a bit. Cheers.
The main setting on the px5 in fine for normal play, I have another one setup for sound whoring ie very loud footsteps
Don't use Duracell batteries, get rechargeable one, if you have a long session you can burn a set of batteries, I always have another set ready charged waiting to go in!
Sound wise just make sure the receiver is in view of you
I use the same strategy, while I'm using the ones in the PX5, I'm charging another pair to use when it runs out. Many people seem to think not having a battery of it's own is a bad thing, I disagree. Being able to constantly game without having to worry about charging it is a plus.