[Butterfly]

I have never made ciems for anyone other than myself and have only used them for casual listening but certain jaw movements do squeeze your ear canal try to push it out. I guess that a sweaty ear is more prone to this, and maybe the sweat gets in the seal and things start sliding about.

One thing that varies with different people and makers is how deep they design their ciems. Some go just round the second bend and others make them quite shallow. A deeper canal is probably more likely to stay in place but may be less comfortable to some. Might be worth looking into some options of varying depths to see if anything works better...

@stegeoc. You are right abouth the depth. Make them as deep as possible without them hurting the inside of your ear. It will prevent leaking a lot.

 

[BadgerMcBadger]

After opening it went sour (hard) within 4 weeks. But maybe I made a mistake not closing it good enough and some air got to it. I just bought a 600ml botlle. So I was a bit disappointed that this happened.

i really hope that doesnt happen to me, can someone else please share their exprience?

 

[BadgerMcBadger]

how important it is for the rab-p to use 1.2mm id tubes? i cant find any 1.2 id with a 2mm od so im planning to use a 1mm id instead. will such a small change noticable affect the sound?

 

[ForceMajeure]

fotoplast should be good in the container until the expiration date even if i opened it right?

Yes, It will be ok, as long as the resin is not in contact with UV light. The older it gets the slightly longer it will take to cure usually.

Also keeping a bottle in a static position will get parts of the photoinitiator particles sinking to the bottom so you'll have less photoinitiators that will promote the curing process. So shaking the bottle before usage will mix things together again, BUT the annoying part is that it will create air bubbles and you'll have to wait a few hours before you can use it.

Technically you could be ok even without shaking it. Plenty of shells have worked out great even having a 1yr old bottle sitting in one place.

how important it is for the rab-p to use 1.2mm id tubes? i cant find any 1.2 id with a 2mm od so im planning to use a 1mm id instead. will such a small change noticable affect the sound?

The diameter is important and will play a role, even a difference of 0.2mm. The upper region and treble will be affected.
Depending on the type of builds you are doing this is something to consider.

 

[talyak]

how important it is for the rab-p to use 1.2mm id tubes? i cant find any 1.2 id with a 2mm od so im planning to use a 1mm id instead. will such a small change noticable affect the sound?

if you are struggling with the 1.3mm id 1.8mm od tubes you found, you could wrap them in take or something. give them an extra .2mm of thickness so they go in a 2mm id tube well?

 

[BadgerMcBadger]

if you are struggling with the 1.3mm id 1.8mm od tubes you found, you could wrap them in take or something. give them an extra .2mm of thickness so they go in a 2mm id tube well?

thats a good idea, but i managed to find a 1.2mm id 2mm od tube in the end.
does the shape of the shell affect the sound much when using a vented driver (rab32257). i was thinking of squeezing a small electrolytic capacitor (5x11mm) in the shell for the zobel circuit but im afraid it will change the sound as it will probably be in the way of the vents

 

[citiesandshapes]

Can anyone provide some input on if these impressions will be sufficient? Self done, and have trimmed them down some

 

[mattmatt]

Can anyone provide some input on if these impressions will be sufficient? Self done, and have trimmed them down some

Looks good. Shape them more a bit to make it look better. Not sure but I think you'll need to build it up a bit for the cable sockets.

 

[Butterfly]

Can anyone provide some input on if these impressions will be sufficient? Self done, and have trimmed them down some

You need to cut of more. Not at the bottom. But around the sides. Make a 90 degree edge with the material. Look at Robert Kaufmann YouTube film.

 

[Butterfly]

You need to cut of more. Not at the bottom. But around the sides. Make a 90 degree edge with the material. Look at Robert Kaufmann YouTube film.

 

[Butterfly]

Cut at the lines

 

[Butterfly]

Cut at the lines

 

[citiesandshapes]

Thank you-do the canals seem to be adequately long? I'm made a pair prior off different impressions, but the canals were longer and caused issues with comfort after prolonged wear.
Regarding trimming them down further-is there any harm in leaving them slightly bigger and sanding down the resin cast to my desired size? Getting good impressions out of my ears has been a pain in the ass, so I'm concerned about cutting down too much and having to start over

 

[Butterfly]

Thank you-do the canals seem to be adequately long? I'm made a pair prior off different impressions, but the canals were longer and caused issues with comfort after prolonged wear.
Regarding trimming them down further-is there any harm in leaving them slightly bigger and sanding down the resin cast to my desired size? Getting good impressions out of my ears has been a pain in the ass, so I'm concerned about cutting down too much and having to start over

Yes. They look just fine.

 

[Butterfly]

Thank you-do the canals seem to be adequately long? I'm made a pair prior off different impressions, but the canals were longer and caused issues with comfort after prolonged wear.
Regarding trimming them down further-is there any harm in leaving them slightly bigger and sanding down the resin cast to my desired size? Getting good impressions out of my ears has been a pain in the ass, so I'm concerned about cutting down too much and having to start over

Next step is waxing them. Make them as smooth as possible. Larger gaps you can fill upfront with some wax. It’s also important to wax them otherwise they will become to small and do not seal adequately.