[BobbyKa]

to me, that looks like youve messed up something on the software/firmware side. it looks like an algorithmic filter

Thought so too.
But as it happens with different Software ans different Laptops...

 

[BobbyKa]

Just tested again. i changed nothing, but now the results are ok. don't know why. but will try to find out.

 

[Aegruin]

Hello guys,
I'm trying a build with x1 22955 x1 29689 x1 31736. I can't seem to get the highs to reach above 13k, any idea what I miss? I also tried center tapping 29689.
Can't reach 13k+

 

[musmecca]

Just tested again. i changed nothing, but now the results are ok. don't know why. but will try to find out.

If your seal between your testing mic and your ba's have ANY opening no matter how small, you will lose bass while testing. Usually a notch like you show is caused by phase interference (incorrect polarity on one of your ba"s), but you saying its now gone sounds like a sealing issue.

 

[talyak]

it would be so useful to have a database of drivers and their fr/thd/characteristics with various tube lengths
maybe also a list of iems with known driver configs as well

 

[talyak]

anyone used a sonion 26a as a woofer? it has extension right the way down to 10hz and has a thd under 1% all the way there. it is pretty small and doesnt have the volume of the dedicated subs, so im curious how good it is in terms of transients.

 

[GeneBush]

Planning to get that too. mind sharing photos of your scans?

I used to have the revopoint pop2 but i exchanged it with someone who had the mini. The difference between the 2 scanners is notable, the mini is more detailed for small objects like earscans etc. In the photos below the scans that i used were cut and clean before the scan.

 

[talyak]

which swfk is folks preferred? there are 5 types on soundlink lol

 

[swtnate]

mind sharing tubing and crossovers? Would like your thoughts as that's at least 3 tubes......I've only managed a 1 mm and 2X2mm so far.

I ran the 20 Ω 38 with 2mmOD, 5-10Ω 28 and TW (.82 to the WB) with a green and 3mmOD and 2Xsw (1uf to one, .47uf to the other) with grey and 3mm OD.

i got a virtually flat response with a boosted high end shelf that is easily manipulative with external eq to become what ever sound stage youd like. At 120 dB with still an added 5-6dB of headroom. less than .05% THD at any of the high shelf peaks.

 

[stegeoc]

Hello guys,
I'm trying a build with x1 22955 x1 29689 x1 31736. I can't seem to get the highs to reach above 13k, any idea what I miss? I also tried center tapping 29689.
Can't reach 13k+

How are you measuring? I tend to ignore everything above around 8kHz as the measurements seem unreliable and there isn't much there anyway. The last time I checked I could only hear up to 14kHz so have never been too worried about that area.
If you've got good young ears then probably want to look at ESTs rather than BAs, but it might be worth checking that you really need it first

 

[stegeoc]

it would be so useful to have a database of drivers and their fr/thd/characteristics with various tube lengths
maybe also a list of iems with known driver configs as well

Have you seen this:
https://docs.google.com/spreadsheets/d/1jguxmYfEmZdHEGIUDvQUnfm3vhxo51WeNKKG0_oRtMA/pub?gid=0#

Last updated 3 years back, but it might be useful

 

[mattmatt]

I used to have the revopoint pop2 but i exchanged it with someone who had the mini. The difference between the 2 scanners is notable, the mini is more detailed for small objects like earscans etc. In the photos below the scans that i used were cut and clean before the scan.

How's the accuracy of the scaling? That's one of the things I was worried about back then.

 

[talyak]

Have you seen this:
https://docs.google.com/spreadsheets/d/1jguxmYfEmZdHEGIUDvQUnfm3vhxo51WeNKKG0_oRtMA/pub?gid=0#

Last updated 3 years back, but it might be useful

oh, this is fricking great. so helpful. thanks!

 

[talyak]

given that the a12t uses the sonion 38 series, i figure thats good enough for me.
final line-up for my more or less end-game build
bass: sonion 38D1XJ007Mi/8a
mids: knowles fed-30048 (as long as my ety build works out ok next week, im gonna stick with this driver)
highs: knowles wbfk-30095
ultra-highs: knowles RAU-34832
tho thats about 200usd in just drivers alone, so im probs gonna wait on actually buying all that.
gonna stick the rau and wbfk in the nozzle. tia style. i will actually have to test with/without damping on those tho. the fed and 38D1X wont need it as they are both damped. gonna wait until they arrive (and the testing rig i wanna get) before creating the crossover tho. gonna try a 4 way, as i can easily get the pcb printed at jlc plus ive got a heatgun for reflow with smd parts. they are all gonna sit within the ear canal hopefully, tho i do need to get impressions done. maybe i could make something like the sb-7 for a universal(ish) design

 

[GeneBush]

How's the accuracy of the scaling? That's one of the things I was worried about back then.

It all depends on how accurately you scan the impressions. It's a bit difficult to get the right lighting and the scan software is still on the beta version but I managed to get pretty decent scans with ~0.1mm difference. Still on the way to get perfect scans though.