So I'm starting a new IEM project, I have desired to have Sensaphonics IEM's for the longest time ever since they made my shells for the the classic Westone UM1/Shure E1. I really wanted some 3MAXs but I just don't have that kind of money (~$1000). Since reading through these forums, I am feeling brave and will attempt to make some of my own 3MAX. I have no idea what components Sensaphonics put in their IEMs. I don't want to to take away from Sensaphonics, I think they make world-class products.
So here is the plan: After much research I have decided on these things:
Things I want to accomplish:
- use the smallest most hidden shell I can make
- use a soft silicone (with a pinkish pigment, hidden is the key here)
- 3-way design accomplished with 4 drivers
- I don't want to use filters or dampers
- give the "sub-woofer" a backspace
- use my existing sensaphonic shells as the ear impression (they're jelly in my ears, so good)
- have a detachable cable
- I grew up in live audio world, so I want to make my 3-way design like that, full rage speaker with an added subwoofer
- Knowles GQ-30783-000 - full range speaker (dual driver)
- Sonion 3300 - "Sub-Woofer" "also dual driver"
- ??? - for the non-inductive low pass I'm thinking of 75Hz crossover freq
- Harder pourable silicone - negative impression/mold
- Super soft platinum silicone - for the new ear shell
- Pink and red Silicone pigment
- 2-wire jack
- and IEM cable that has a bendy thing to go up and around the ear with a 2-wire prong
I plan on posting pictures and posting info as I go. I would really like any input you have. I have no way of tuning before it's all done, so I'm hoping the full range with the sub is the "done all on paper trick"
Other ideas I'm having is using a longer narrower hole for the low end driver, and a short hole with a trumpet-like opening for the full range. I'm not sure about time alignment issues at these distances.
Also, I'm going to diagram it all out before anything gets put together, I want to make sure the impedances are right and all that jazz, so I might get higher impedance drivers and wire them in paralell with an in-line low pass to the sub. Fun Times!
I want to try to keep all this below $250