Hi,
So I just received my A12T:s and I am in love with the sound and the soundstage! I also love the instrument separation, I truly have no complaints regarding the signature of the sound. It's just what I wanted.
But I have some concerns..
These are my first CIEM:s and I do not know how much they are supposed to seal and how they are supposed to feel. When I put them in almost everything is silent but I can still hear higher frequency sounds.
If I have no music playing I can still hear my mechanical keyboard while I am typing. I can also hear people talking but it's very muffled and it's also very very low. Is this normal? Or should it be as silent as when I was at the audiologist and got my impressions?
Because when I got my impressions I truly experienced silence! I couldn't hear anything at all but I guess that CIEM:s will never be that silent? I've also read that acrylic CIEM:s will have a harder time getting a proper seal compared to silicone.
Another question regarding the fit, I have no problem inserting the A12T:s. And when I remove them I have to twist them to break the "seal" or else they won't come out. When I have them in I can still feel them, today I will try to have them in for a longer period of time.
And I truly hope that they won't start irritating my ears, but I guess my ears have to get used to this kind of feeling?
So to sum up, what kind of seal should I expect and what are you supposed to hear (outer noise) while you have them in?
Thanks in advance!
You shouldn't get the same silence as when you're getting impressions because 64 Audio IEMs have apex modules. A full seal (like with silicone impressions) would generally result in -27dB of noise isolation. A 64 Audio IEM with an M15 apex module will give you -15dB of isolation, and an M20 module will give you -20dB. If the external noise you're hearing is comparable to the music that's playing through the earphones, then it's not sealing correctly. But, if the external noise becomes 90% drowned out by the time you have music playing at a reasonable volume, then you've achieved a seal.
Having owned both, silicone and acrylic IEMs don't seal better or worse than one another; simply differently. Acrylic IEMs are much, much, much easier to insert and take out. Silicone IEMs are inherently sticky and tacky, so inserting them and pulling them out will require more strength and bravery than you'd expect, but you certainly get used to it. Acrylic and silicone IEMs both have the potential to disappear in the ear, but the sensations are different. Acrylic IEMs sit in the ear as they do, while silicone IEMs almost feel like they're fusing with your ear. The latter also feel denser because they're fully filled, while I've personally felt hollow acrylic CIEMs to be more comfortable because they're a bit lighter and feel less stuffy in the ear.
Twisting CIEMs in and out are actually the proper way to insert and remove them. I assume you twist them forwards to remove them, right? To most reliably achieve a perfect seal when you're inserting them, I'd recommend reversing that exact motion. Put them in halfway with the cable sockets almost facing down, then twist them back so they lock into your concha. Also, a tip is to check the flap just above your crus of helix (or where the cable meets the IEM). Sometimes that flap may accidentally fold in on itself and prevent a good seal. If that happens, getting that flap free will immediately give you a more secure, comfortable fit. If these are your first CIEMs, it's completely natural to feel them in the ear for the first week or two. 64 Audio's IEMs tend to be on the tighter side too, so it'll probably be a couple weeks of daily use until they really start to vanish. But, if there aren't any immediate discomforts or pains (i.e. within the first minute or two), then the fit should be alright.