Home-Made IEMs
Mar 23, 2020 at 4:34 AM Post #11,162 of 13,624

TOBIJampar

New Head-Fier
Joined
Jan 28, 2020
Posts
11
Likes
3
Location
Germany
Someone wants a pair of monitors done and is paying for it. I´ll keep you posted if you are interestedt. I could also send you a small ammount of resin if you want to try it out.
I just got the prints from Farquarl and they came out really nice and fit perfectly :D IMG_20200323_092721.jpgIMG_20200323_092725.jpg
 
Mar 25, 2020 at 11:04 AM Post #11,165 of 13,624

tomekk

100+ Head-Fier
Joined
Nov 1, 2016
Posts
153
Likes
215
Location
Warsaw, PL
I'll connect the crossovers to the sonion drivers.

This will actually not be needed because acupass is an acoustic crossover , and it is designed not to use electric lowpass. Just one capacitor for 2389, connected to half the coil, What uF? I'd do well to experimentally listen to the ear and observe the impedance diagram / freq resp. I will try 10uF. You definitely need to check the polarity 38D1XJ.
 
Mar 30, 2020 at 12:06 PM Post #11,169 of 13,624

tomekk

100+ Head-Fier
Joined
Nov 1, 2016
Posts
153
Likes
215
Location
Warsaw, PL
Hodvtec yellow edit: orange damper 1mm*22mm full range, white damper 20mm*2mmCI full range with Rab 0,47uF +maybe resistor 5Ohm series , 2mm*15mm Double TWFK, all drivers connected parallel 1uF white damper. (OFC, HODVTEC requires the right polarization, TWFK also. You have to test the phases.)
 
Last edited:
Mar 30, 2020 at 12:38 PM Post #11,170 of 13,624

Kulgrinda

100+ Head-Fier
Joined
Oct 23, 2017
Posts
202
Likes
130
Location
LT
Hodvtec yellow edit: orange damper 1mm*22mm full range, white damper 20mm*2mmCI full range with Rab 0,47uF +maybe resistor 5Ohm series , 2mm*15mm Double TWFK, all drivers connected parallel 1uF white damper. (OFC, HODVTEC requires the right polarization, TWFK also. You have to test the phases.)
Thanks! It would quote difficult to fit i a universal fit shell, I just only managed to fit 2xCI + Twfk in one shell.

What impact adding Cap and Rez to RAB make? Cap would work as high pass, right, so Rez would make it more silent?

Hodvtec and twfk requires right polarization - polarity is marked in the schemes, are they not reliable?
 
Mar 30, 2020 at 1:50 PM Post #11,171 of 13,624

tomekk

100+ Head-Fier
Joined
Nov 1, 2016
Posts
153
Likes
215
Location
Warsaw, PL
Thanks! It would quote difficult to fit i a universal fit shell, I just only managed to fit 2xCI + Twfk in one shell.

It is recipe for CIEMS, universals - you can use shorter tubes, any, the ear canal will compensate for tube lengths. You can use 2mm cuted needles to reduce the thickness of the shell tip constriction. Actually, it's an 9/10 on a scale of difficulty. You need a large universal housing. Something like a KZ big shell.

What impact adding Cap and Rez to RAB make? Cap would work as high pass, right, so Rez would make it more silent?

Yes, highpass on the RAB allows for working in one phase with CI. RAB adds a lot of air and improves the CI scene. The resistor allows to cut the dry midrange sounds in RAB (I don't know if it will be needed there) I used it in damper free 2mm tubes projects.

Hodvtec and twfk requires right polarization - polarity is marked in the schemes, are they not reliable?

Probably Hodvtec must be connected with reverse polarity to CI. In case of TWFK it may be similar, but it should fit in positive polarity.
 
Mar 30, 2020 at 2:22 PM Post #11,172 of 13,624

Kulgrinda

100+ Head-Fier
Joined
Oct 23, 2017
Posts
202
Likes
130
Location
LT
It is recipe for CIEMS, universals - you can use shorter tubes, any, the ear canal will compensate for tube lengths. You can use 2mm cuted needles to reduce the thickness of the shell tip constriction. Actually, it's an 9/10 on a scale of difficulty. You need a large universal housing. Something like a KZ big shell.



Yes, highpass on the RAB allows for working in one phase with CI. RAB adds a lot of air and improves the CI scene. The resistor allows to cut the dry midrange sounds in RAB (I don't know if it will be needed there) I used it in damper free 2mm tubes projects.



Probably Hodvtec must be connected with reverse polarity to CI. In case of TWFK it may be similar, but it should fit in positive polarity.
Thank you for your input, good base for my experiments.

Any experience with Sr? I've somewhere it should make a good woofer and it is only one top firing driver currently available at Soundlink, so I was curiuos.
 
Mar 30, 2020 at 7:04 PM Post #11,175 of 13,624

Cevisi

Headphoneus Supremus
Joined
Feb 11, 2019
Posts
1,960
Likes
1,274
Location
Germany
Hi guys, just sharing the latest.

3D printed Finale 2, Elegoo Mars with dental biocompatible resin.

P_20200330_185454.jpgP_20200330_185427.jpgP_20200330_185414.jpg
Nice how did you scan it ?
 

Users who are viewing this thread

Top