Home-Made IEMs
Dec 8, 2019 at 2:22 AM Post #10,576 of 15,989
Kan Andromeda uses 5 drivers not from the aftermarket, maybe those 5 drivers match the size and physicality of other products such as knowles rab, bk, ed ... or sonion ...?
well, they could be custom, but all knowles’s driver family have same diaphragm and housing, just different coils for impedance.

Except RAB (maybe), a few of those drivers pretty different response, even under test conditions (low impedance amp so that driver impedance barely affects response)
I doubt it’s sonion, they don’t have a vent on their models in that spot, and their metal housings look different.
 
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Dec 8, 2019 at 2:22 AM Post #10,577 of 15,989
Its a SWFK. Everyone always thinks it is TWFK, and it drives me nuts. I explain that later.

ED or Bellsing ED for mids

Hodvtec is still the same, maybe different impedance but same output

FK aspect of a TWFK (woofer) has a vent. SWFK does not. Look at the glue in this photo. There’s no way there is a vent, especially with the quality control aspect of hot glue. The back of the SWFK is completely underwater.



But I am absolutely down for the challenge. The resonator will be hard. I don’t think it uses any dampers, but as we don’t know for sure, those are still fair game. Zobel circuit of course can be used.

I haven’t heard the andro, but I know they are fairly nuetral, hard to drive and a sparkly treble.
It will be hard to replicate without hearing them though.
We might end with better sound
HODVTEC 31618
Sonion 2356
SWFK31736
 
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Dec 8, 2019 at 2:25 AM Post #10,578 of 15,989
We might end with better sound
definitely possible. I know these are super hard to drive, and I heavily doubt there is a Zobel. so with ability to use Zobel, and a bigger housing, we could have a big advantage.

Also just bought 4 2389’s and the replacement EST for my other build
 
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Dec 8, 2019 at 2:49 AM Post #10,581 of 15,989
I feel like the FK lineup will continue to be frequently discussed here, so here is a little guide for remembering all the names
image.jpg
sorry my handwriting is terrible, and the picture didn’t rotate.
Anybody know anything about the QWFK? google brings back nothing

Every FK-type ever made:
https://www.mouser.com/PCN/Knowles_Corporation_PCN_20190611_WBFK_SFY_+_Thermobond_General_Market.pdf

EDIT: I forgot DFK. Seems like old DWFK, from 2008.
 
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Dec 8, 2019 at 6:08 AM Post #10,582 of 15,989
Dec 8, 2019 at 8:48 AM Post #10,585 of 15,989
Yes the reviewer said
Who is the reviewer
Hey guys what is the BEST single driver setup you guys have come across? Currently using a 37757 with a white filter and its not quite there, any suggestions on maybe using different drivers or a different setup?
Cheers
Its 32257

@et.haan

Its not CL but ci(CI)

Now Andromeda slayer

Its simple

HODVTEC 31618
Zobel from DCR
Yellow damper near spout

2354
Zobel from DCR
Orange damper near spout

Both in parallel

Same lenght tube on both driver
Use the small size damper

Because both driver will have 1mm ID tube



SWFK31736
Cross so that it can create a 8kHz peak on a system with resonance at 8kHz but also not adding to mids

Damperless
2mm ID tube



As per orignal Andromeda

They low passed the mid and woofer
And the SWFK impedance makes it very weird

Bad Amps will make it brighter


This one avoids thats and keeps impedance superlow


This would measure like 2.4ohms flat


So do add some resistor in series to it


2354 inductance is 1.5mH
HODVTEC inductance is given in datasheet
 
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Dec 8, 2019 at 9:07 AM Post #10,586 of 15,989
Who is the reviewer

Its 32257

@et.haan

Its not CL but ci(CI)

Now Andromeda slayer

Its simple

HODVTEC 31618
Zobel from DCR
Yellow damper near spout

2354
Zobel from DCR
Orange damper near spout

Both in parallel

Same lenght tube on both driver
Use the small size damper

Because both driver will have 1mm ID tube



SWFK31736
Cross so that it can create a 8kHz peak on a system with resonance at 8kHz but also not adding to mids

Damperless
2mm ID tube



As per orignal Andromeda

They low passed the mid and woofer
And the SWFK impedance makes it very weird

Bad Amps will make it brighter


This one avoids thats and keeps impedance superlow


This would measure like 2.4ohms flat


So do add some resistor in series to it


2354 inductance is 1.5mH
HODVTEC inductance is given in datasheet

@et.haan

yes RAB 32257 with white filter. Unless you have a different preference.
 
Dec 8, 2019 at 9:56 AM Post #10,588 of 15,989
Who is the reviewer

Its 32257

@et.haan

Its not CL but ci(CI)

Now Andromeda slayer

Its simple

HODVTEC 31618
Zobel from DCR
Yellow damper near spout

2354
Zobel from DCR
Orange damper near spout

Both in parallel

Same lenght tube on both driver
Use the small size damper

Because both driver will have 1mm ID tube



SWFK31736
Cross so that it can create a 8kHz peak on a system with resonance at 8kHz but also not adding to mids

Damperless
2mm ID tube



As per orignal Andromeda

They low passed the mid and woofer
And the SWFK impedance makes it very weird

Bad Amps will make it brighter


This one avoids thats and keeps impedance superlow


This would measure like 2.4ohms flat


So do add some resistor in series to it


2354 inductance is 1.5mH
HODVTEC inductance is given in datasheet
https://headfonics.com/2016/08/the-andromeda-by-campfire-audio/
 
Dec 8, 2019 at 10:01 AM Post #10,590 of 15,989
Andromeda Z.png


This gonna make some Andromeda fans bleed..

I am like

Seriously
Why


Plus I have been spoiled so much by different iteration of Harman kardon profiles and some of my specific tuning that now I feel Andromeda is just shimmer...nothing more...

Andromeda when I heard for first time was like wow..

But after hearing Noble khan, 64audio U12T, Custom Art FIBAE 7 universal , FIBAE black and Warbler prelude...I feel Andromeda lacking everywhere
 
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