[swtnate]

what tolerance is usually considered acceptable for the zobel circuits?

The tighter your tolerance with the components the better. I use SM MELF resistors to help with that. MELFs also reduce signal noise. Standard smd ceramic capacitors will suffice. Remember, the signal is passive, so unless you give the headset a boosted active signal, its difficult to cause damage of the components.

 

[BadgerMcBadger]

signal is passive, so unless you give the headset a boosted active signal,

can you elaborate more? im not sure i understand what do you mean by a passive and active signal

 

[BadgerMcBadger]

what precentage of tolerance do you usually use?

The tighter your tolerance with the components the better. I use SM MELF resistors to help with that. MELFs also reduce signal noise. Standard smd ceramic capacitors will suffice. Remember, the signal is passive, so unless you give the headset a boosted active signal, its difficult to cause damage of the components.

what tolerance do you usually settle for?

 

[swtnate]

MELFs are usually like .1-.5% capacitors are more like 5-10%

 

[tomekk]

External SMD tuning to have more fun

 

[talyak]

External SMD tuning to have more fun

thats cool. i plan to do something similar with my TOTL build. (tho im half tempted to implement an active dsp crossover)

 

[swtnate]

Here’s the newest iteration I have come up with;
10 driver triple bore custom IEMs with relatively flat, slightly scooped in the mid to upper-mids.
Shell color is electric yellow resin (Pro3dure PR-1)
the faceplates were made from combining Blue and Red PR-1 with small amount of black ink.

There will be ONE more tweak I make to these before being satisfied. The sub frequencies sound TOO restricted to my natural ear, which is a bit of a shock. I plan to either dial back the series resistor or swap the sonion 3300 for my newly arrived 3800. With an external EQ I can get the boosted response though…. SOOO, I might just leave these as is and work on another iteration that includes the 3300 with less added series resistance OR use a 3800. Time will tell…. If anyone is interested in the components used, tubing, dampers, estron wire, etc. shoot me a DM. Once they are perfected I will post the final version. Good to finally BE THROUGH this journey. It’s NUTS how long it has taken to get all the drivers in tune, phase issues eliminated, and the proper internal room to run three tubes with dampers. This build may not work for those with small canals.

 

[talyak]

Here’s the newest iteration I have come up with;
10 driver triple bore custom IEMs with relatively flat, slightly scooped in the mid to upper-mids.
Shell color is electric yellow resin (Pro3dure PR-1)
the faceplates were made from combining Blue and Red PR-1 with small amount of black ink.

There will be ONE more tweak I make to these before being satisfied. The sub frequencies sound TOO restricted to my natural ear, which is a bit of a shock. I plan to either dial back the series resistor or swap the sonion 3300 for my newly arrived 3800. With an external EQ I can get the boosted response though…. SOOO, I might just leave these as is and work on another iteration that includes the 3300 with less added series resistance OR use a 3800. Time will tell…. If anyone is interested in the components used, tubing, dampers, estron wire, etc. shoot me a DM. Once they are perfected I will post the final version. Good to finally BE THROUGH this journey. It’s NUTS how long it has taken to get all the drivers in tune, phase issues eliminated, and the proper internal room to run three tubes with dampers. This build may not work for those with small canals.

they are looking awesome! what's your driver line-up? oh and what target are you normalising to?

 

[swtnate]

they are looking awesome! what's your driver line-up? oh and what target are you normalising to?

I use 130dB and I calibrate my mic using a signal calibrater:
this has the following drivers in each ear:
1x 33AJ007i/9 yellow damper

1x 28UAP
1x TWFK
coupled into one 3mmOD using a green damper

2x SWFK
coupled into one 3mmOD using a grey damper

 

[talyak]

I use 130dB and I calibrate my mic using a signal calibrater:
this has the following drivers in each ear:
1x 33AJ007i/9 yellow damper

1x 28UAP
1x TWFK
coupled into one 3mmOD using a green damper

2x SWFK
coupled into one 3mmOD using a grey damper

so it has a flat response without any normalisation? wouldn't that make the treble/upper mids/bass pretty boring?
edit: (what im asking is whether you are normalising to harman combined, or ief neutral, or diffuse field, etc?)
edit2: (130db also seems extremely high given that normal safe listening levels are like 80db)

 

[talyak]

has anyone used the sonion dual driver units as two separate drivers before? it occurred to me that it should be possible to have one with a crossover to give a 5db bass shelf at 200hz or so. then use the second driver to make it keep rising under 100hz to give a sub-bass rumbling in your soul type vibe

 

[swtnate]

so it has a flat response without any normalisation? wouldn't that make the treble/upper mids/bass pretty boring?
edit: (what im asking is whether you are normalising to harman combined, or ief neutral, or diffuse field, etc?)
edit2: (130db also seems extremely high given that normal safe listening levels are like 80db)

I essentially calibrate and test the drivers as identical as I can get to the manufacturer test conditions. Also, I wanted an EQ that is SUPER malleable with an external Eq. But, yes, the bass was a bit TOO lacking.

 

[swtnate]

has anyone used the sonion dual driver units as two separate drivers before? it occurred to me that it should be possible to have one with a crossover to give a 5db bass shelf at 200hz or so. then use the second driver to make it keep rising under 100hz to give a sub-bass rumbling in your soul type vibe

You’d be hard pressed to split the dual sub drivers and achieve what you are describing. You can get close using the 3800 acupass.

 

[BadgerMcBadger]

Yes...you need to submerge the unfinished shell into glycerin to prevent the sticky inhibition layer. On the inside of the shell, make sure it is fully filled with glycerin as any bubble with become permanently visible on your shell. Pictured is how I do it....I have a glass cup filled with glycerine that I submerge the shells into. I then put the glass into my chamber and final cure for a few minutes. I'll then take them out and clean with soapy water. Regarding the fotoplast, my understanding is 365 is the standard.

what is the total power output of the setup in the picture? i think i will do something similiar

 

[piotrus-g]

has anyone used the sonion dual driver units as two separate drivers before? it occurred to me that it should be possible to have one with a crossover to give a 5db bass shelf at 200hz or so. then use the second driver to make it keep rising under 100hz to give a sub-bass rumbling in your soul type vibe

Funnily enough that was one of the first configuration I built in early 2013.
From the description I'd say guys at Subtonic could be doing something of that sorts, but I really can't say for sure.
Overall I haven't revisited this type of wiring since back in the day (which I guess is telling). You might be actually better off just using say 2x3300 instead of single 3300 with split wiring - more headroom, less distortion and overall more control of the fr response as you could additionally play with resistance/inductance of each unit.