Last week I took delivery of my Sennheiser IE8 IEM and just love them. However as I posted elsewhere on this forum I didnt find any of the tips very comfortable, having been used to the Shure 420 foam variety and I therefore ordered a set of Comply T400 tips that are said to be compatible. These arrived today.
I found it nearly impossible to get the things on.
As I was trying to twist the foam pad on I discovered that the tip of one of the headphones (the circular/ cylinder bit that the pad goes onto) had become loose from the main body of the earphone.
It seems the two parts are glued together. I found that the rubber sleeve on the comply tip had put a vise like grip on the tip of the headphone and in trying to twist the bud on I had loosed the seal between the two parts of the headphone.
In attempting to remove the offending tip without twisting it I had to destroy it so it and it cant be used again.
I was able to resecure the two parts of the headphone with very careful application of some superglue and thank god they have otherwise suffered no ill effects. You can imaging how gutted I was when I thought I had wrecked my brand new headphones!
I put a second tip on the headphone and this seems to have gone on easier. I will however have to leave the tips on there now as the only safe way to get them off without further risk of damaging my headphones is to force them off from the inside edge, rather than gripping and twisting them.
I have a pair of CX300 headphones and tried the Comply tips on these. They slip on and off much easier.
Evidentally, whilst Comply say the same T400 tips fit CX and IE models they seem to be too tight a fit for the IE range. Or at least, they will go on with some effort but dont expect to be able to interchange tips without wrecking the ones fitted in the process.
My advise is dont use them for risk of possibly damaging your very expensive IEM's.