They're good with the X00. One thing you have to make sure you do though when you install them is make sure all the 4 locking plastic hooks are in place. The thicker material of the Alpha pads gets caught up on those slots and sometimes the hooks don't make great contact. You just have to make sure you put pressure on all four sides with your hands and twist to lock. The first time I put them on I was trying to figure out what the hell happened to the bass and then I realized only 3 out of the 4 clips had locked into place so the sound was escaping resulting in zero bass and weirdness. Then I got them on and my ears thanked me later.