Rotation of IEMs in the ear

[Eangler]

I am new to this hobby and even newer to IEM's. I've had the cheap ones and the Apple ear pods and never liked any of them. Nevertheless I took a chance on the iBasso IT00 and they are growing on me. My question is about the positioning in the ear. When I turn them and get them just right the bass is easily double what it is at just 30-40 degrees in either direction. I would call this "clocking" and when it's right the sound is quite nice and they are comfortable. Can anybody explain what is happening physically in the ear ? I am very curious as the IEM's do not appear to have any directionality to them. Thanks!

 

[Eoin]

The axis of rotation on the stem (part in your ear) generally are elliptical, meaning as you are rotating, the tip position is moving left right up down.
This movement is sealing/unsealing your ear canal and effecting the sound.
I’d suggest trying different tip types and sizes that best suit the sound you wish to achieve at the rotation point you find most comfortable.
Everything …. Tip types, insertion depth and slight rotation are all very personal to the individuals ear canal shape.
The best indication of a good seal is the slight vacuum sensation one gets when you gently press slightly deeper.

 

[LFC_SL]

Are you wearing them correctly? There should not be that much movement. Try out different tips

https://www.moon-audio.com/shure-magazine/shure-earphones-how-to-fit-properly

 

[Eangler]

Thanks folks for the tips and info. I will surely check out the link. This is a learning experience for me.