Hi guys! I've made two pairs of custom tips from an audiologist, a hard one and a silicone one for my westone 3. The hard one is full impressions and the w3 stick out from the ear, I don't have isolation at all, also the tube inside the custom is like a cave lol. I fixed the fit between the custom tip and westone 3 with a cut off cylinder from my tips, but again I have no isolation. The silicone one is half impression (just like um56), fits well and have good isolation, not as good as triple flangs though. The sound is a tad better than triple flangs but the bass is a little overpowering and mids and highs does not have enough sparkle, the details are there but not so forward, no sibilance. The sound tube of the custom tips is not very good again, but not as bad as the other hard custom tips.
Question 1: I think that the best material is the hard one cause it helps the highs and mids to "run" better inside the tube, I think that the silicone absorbs some sparkle, and enchants the bass. What's your experience?
Question 2: The diameter of the sound tube clearly enchants the highs if it is larger. Of course if you use silicone you need a big diameter inside. I think with the hard plastic the diameter can be thinner.
Question 3: Does the soundtube inside the custom affects sound quality if it has "corners" and is not straight to the ear? I think it does in the case of silicone tips when the sound hits the wall, not sure about the hard material though.
Question 4: It seems impossible to have great isolation with the hard material? I've made two impressions send the w3 four times but the best result I had was mediocre.
PS: Sorry for my English, also I think westone 3 are very hard to find the best sound, but I imagine how they could be if I had a perfect fit