[dhruvmeena96]

How on earth can you fit these into a shell?

well, you are right

metal foil is must
cap has to be higher quality

that is comsol thingie

SILMIC showed least deviation

Nobium cap or good ceramic is lowest point
metal foil resistor is must


ROSE technics use silmic for crossover in BR7

well, highest quality(technical standpoint) so that deviation in spec is minimised

 

[dhruvmeena96]

Here comes the magic

Resistors should be metal foil and caps have to SILMIC II

Impedance is dropped like hell by just simple circuit design.

Zobel and L-pad

Total attenuation is 8dB
Knowles rates the RAB at 108dB, so mine is 100dB

Keeps DC resistance of original but heavily damps the circuit and fixes the impedance and phase. No shift in FR as such.

How on earth can you fit these into a shell?

well, you are right

metal foil is must
cap has to be higher quality

that is comsol thingie

SILMIC showed least deviation

Nobium cap or good ceramic is lowest point
metal foil resistor is must


ROSE technics use silmic for crossover in BR7

well, highest quality(technical standpoint) so that deviation in spec is minimised

OK

tell me what should i use in quality component then

@piotrus-g @Ivan TT @Shilohsjustice @IvanNOON

 

[IvanNOON]

OK

tell me what should i use in quality component then

@piotrus-g @Ivan TT @Shilohsjustice @IvanNOON

No idea

L-pad is series before shunt, why do you have shunt before series?

 

[dhruvmeena96]

No idea



L-pad is series before shunt, why do you have shunt before series?

That is magic bro

Ok if i use the shunt as it is

it drops to 11ohm

if i use series resistance and then a shunt, impedance fix is less noticeable in some part

ok

First signal goes in Zobel, dropping the rising impedance
Then it go into shunt notch parallel resistor, to drop of impedance peak like magic
then a series resistor of highest quality to add back the lost resistance equally to whole impedance graph

 

[dhruvmeena96]

parallel resistor

formula (1/R1) + (1/R2)

so if we take DC resistance 22ohm
and by going about the value of shunt i did

the new value is 11.47826086956 ohm for the driver

on 500 Hz stock impedance is 33 ohm

then the value for driver is 13.89473684210 ohm

on 1kHz stock does a 48ohm(this is Z of a driver)

mine will do a 16ohm

on Resonant peak point, stock does a ~200 ohm

mine does a 21.3ohm


and zobel is making things flat already on HF

Now, adding back the lost resistance according DC resistance(Approx 11.5ohm), we need a resistor which can provide a linear resistance increase

so i added a 10.5ohm in final
so new values are very different from old RAF

Old Stock Values

22ohm DC
33ohm 500Hz
48ohm 1kHz
~200ohm 3kHz

And the rising impedance



New values

22ohm DC
24.4ohm 500Hz
26.5ohm 1kHz
31.8ohm 3kHz

and Flat impedance



the new driver has lost 7.329dB~8dB according to Knowles Pro paper
which gives our driver a total of 100dB ~ 101dB nearby sensitivity on 22ohm compared to stock 108dB 22ohm on stock driver
Then there is some loss on treble side after 7kHz due to zobel working on RAB

so my average is 98dB 22ohm on RAB but with somewhat tamed near neutral impedance

 

[dhruvmeena96]

parallel resistor

formula (1/R1) + (1/R2)

so if we take DC resistance 22ohm
and by going about the value of shunt i did

the new value is 11.47826086956 ohm for the driver

on 500 Hz stock impedance is 33 ohm

then the value for driver is 13.89473684210 ohm

on 1kHz stock does a 48ohm(this is Z of a driver)

mine will do a 16ohm

on Resonant peak point, stock does a ~200 ohm

mine does a 21.3ohm


and zobel is making things flat already on HF

Now, adding back the lost resistance according DC resistance(Approx 11.5ohm), we need a resistor which can provide a linear resistance increase

so i added a 10.5ohm in final
so new values are very different from old RAF

Old Stock Values

22ohm DC
33ohm 500Hz
48ohm 1kHz
~200ohm 3kHz

And the rising impedance



New values

22ohm DC
24.4ohm 500Hz
26.5ohm 1kHz
31.8ohm 3kHz

and Flat impedance



the new driver has lost 7.329dB~8dB according to Knowles Pro paper
which gives our driver a total of 100dB ~ 101dB nearby sensitivity on 22ohm compared to stock 108dB 22ohm on stock driver
Then there is some loss on treble side after 7kHz due to zobel working on RAB

so my average is 98dB 22ohm on RAB but with somewhat tamed near neutral impedance

well i did a mistake

Zobel will go inside and reverse L-pad will come outside

 

[koold]

What is your role on stage? In this thread, a few pages back, there is a guitarist very happy with his GK build.

I did not test the GK, but I built a GV and the scary crossover (among others) I did love the GV the most so far. The scary crossover is an intense build, definitively do not start with that.

You should probably follow Benjamins advice, he definitively knows what he's talking about.

Thank you for your input, I will be mostly playing synths and drum machines, so I need to hear the full spectrum as clear as possible.

@koold
GQ-30783 is a good starting point - simple double with 1 sound outlet = only 1 tube to worry about.
White/brown damper for neutral, green/red/orange for bassier sound.
Experiment with 1.5mm/2mm tubing.
2mm*15mm with brown damper (@ end of tube) worked well for me.

If you feel more adventurous try the GQ+RAB build mentioned previously.

I was thinking on going with a 3-way system, I am not that scared of the two tubes... but I don`t feel like messing around with crossovers or many dampers configurations.

I would prefer ordering from mcear than from aliexpress , especially for the shipping times and costumer service in case of any problem, he answered my emails straight away and very kindly, I am placing an order to buy all the stuff neded to make the CIEM there (molds, acrilyc, tubes, cable, etc..)

That´s why I was between this three options, GK-33211-000, GK-31732-000 and GV-32830-000

I mostly inclined to follow his advice to get the GK-33211-000 with no dumpers, but can´t find any info about it, but he told me that it has more bass than the GK-31732-000.

GV sounds good
On stage, you need bass

Do you mean that the GV has enough bass? or that I need extra bass?

Thank you all!!

 

[eunice]

Do you mean that the GV has enough bass? or that I need extra bass?

The GV has two small ports with a tape on it. You can remove the tape for more bass. I also reduce the highs with orange/yellow dampers in both tubes. That gives plenty of bass. Definitively enough.

 

[dhruvmeena96]

Thank you for your input, I will be mostly playing synths and drum machines, so I need to hear the full spectrum as clear as possible.



I was thinking on going with a 3-way system, I am not that scared of the two tubes... but I don`t feel like messing around with crossovers or many dampers configurations.

I would prefer ordering from mcear than from aliexpress , especially for the shipping times and costumer service in case of any problem, he answered my emails straight away and very kindly, I am placing an order to buy all the stuff neded to make the CIEM there (molds, acrilyc, tubes, cable, etc..)

That´s why I was between this three options, GK-33211-000, GK-31732-000 and GV-32830-000

I mostly inclined to follow his advice to get the GK-33211-000 with no dumpers, but can´t find any info about it, but he told me that it has more bass than the GK-31732-000.


Do you mean that the GV has enough bass? or that I need extra bass?

Thank you all!!

GQ + RAB is easiest as you are not messing the crossover. Just run them in full range and use the specified dampers

its good in tuning(actually very good detail in air)

 

[dhruvmeena96]

@IvanNOON @eunice @Ivan TT @zern_c @Rabid86
i did reworked the circuit

now
zobel is connected directly to driver

parallel shunt notch is 8.55ohm and 16ohm is in series(Reverse L-pad)

Latest Filter

DC - 22.15 ohm
500Hz - 22.79 ohm
1kHz - 23.25 ohm
3kHz - 24.19 ohm
>5kHz - 22.78 ohm

Old Filter


DC - 22 ohm
500Hz - 24.4 ohm
1kHz - 26.5 ohm
3kHz - 31.8 ohm
>5kHz - 24.4 ohm


Stock


DC - 22 ohm
500Hz - 33 ohm
1kHz - 48 ohm
3kHz - 200 ohm
>5kHz - Rise

 

[dhruvmeena96]

Finally solved the impedance plaguing issue without inductor coil(series notch)
plus resonant peak can be damped on any driver now, which solves the phase issue

For impedance rise, voice coil rise
i need voice coil inductance


but after seeing the knowles data, it is better to use the WBFK or SWFK for tweeter in any purpose. Because the rising impedance is way more flat and can be damped by L-Pad or reverse L-pad(my formula way)

 

[Furco]

Well

Go for GQ-30783 and RAB-32257


GQ-30783 => 2.0mm x 19.5mm tubing with a Knowles Green filter (1500ohm) at center of tube + Knowles grey filter (330ohm) after green filter
RAB-32257 => 2.0mm x 15.5mm tubing with Knowles grey filter (330ohm) at center of tube

no crossover required

some soldering required

@Furco design, sounds amazing

If you can get the right fit, in terms of your cIEMs or universals, the sounds is definitely excellent. I still use the pair I built a few years ago today.

 

[Ivan TT]

zobel is connected directly to driver

parallel shunt notch is 8.55ohm and 16ohm is in series(Reverse L-pad)

Sorry, cannot quite figure out the circuit.
Can draw it?

 

[dhruvmeena96]

If you can get the right fit, in terms of your cIEMs or universals, the sounds is definitely excellent. I still use the pair I built a few years ago today.

Well, the damper position, I wanted to know

Where did you place damper

 

[dhruvmeena96]

@Rabid86 thanks for testing the design
@Ivan TT I will post the new design today

Rabid86 states that zobel was to powerful in damping the whole spectrum(I still dont know the driver as RAB and RAF peak is on 3kHZ).

Hmm if the zobel is damping so much

That can be due to 41.25ohm resistor

So does any body know if I reduce resistor, how much the change in caps should be

Well he also states that, distortion figures at 1kHz seems more noticeable. I think surrounding distortion was damped so much that distortion seemed obvious at that range.

Lol