[et.haan]

Also, I was looking around at some drivers, anybody ever treid GD? Looks very interesting, like the SWFK.

RAB-32037 has no snout.

WBFK-30042 is like WBFK-30019, with no snout.

Also, FEH looks very good as a mid. Ferrofluid too.

 

[Ivan TT]

Interesting. How do you think this would sound with the SWFK?

No idea and I don't have SWFK anyway

By x4 RAF do you mean 4 RAF design? or 4th in series of your design?

4 RAF drivers in series, glued together in a brick like formation

I dont see any nozzle-less RAF, do you just pull it off, like I did with the TWFK and HODVTEC?

Yes, I posted early experiments few pages back...

Care to shoot a picture of one?

A bit later, but here's FR:

 

[et.haan]

No idea and I don't have SWFK anyway

4 RAF drivers in series, glued together in a brick like formation

Yes, I posted early experiments few pages back...

A bit later, but here's FR:

Wow, what a fantastic looking response! I feel that with playing around with tubing, we could get that LF bump down an octave, and it would be a good sub/woofer and a mid all in one. Great results!

edit: i mean a steeper curve, later on. Like 100hz instead of 250. Maybe it is not possible.

 

[Xymordos]

Also, I was looking around at some drivers, anybody ever treid GD? Looks very interesting, like the SWFK.

RAB-32037 has no snout.

WBFK-30042 is like WBFK-30019, with no snout.

Also, FEH looks very good as a mid. Ferrofluid too.

I've used the GD60599, its a mid-high driver that's really quiet. Super peaky though so not easy to use.

 

[et.haan]

I've used the GD60599, its a mid-high driver that's really quiet. Super peaky though so not easy to use.

Sounds pretty meh... how was tone?

 

[et.haan]

Dhruv,
As you know, I am using 26805 as mid on my EST build. What are your thoughts on dampers for it?? It likely wont play past 6khz. I was thinking green, 1cm from driver.

Also, I was wondering, as we know that damper position affects sound, is there a known relationship? Like 330ohm @3cm = 680ohm at 1cm, or something like that?

I would like to think that they dont have a relationship, so that I could slow driver's impulse without affecting response (to get warmth or tone) and vice versa (low pass).

 

[Xymordos]

Sounds pretty meh... how was tone?

I used it as treble driver, seemed pretty good to me haha. You'd probably need to stack a few of them together to get enough SPL to use a damper. 4 of these drivers is around the size of a DTEC.

 

[dhruvmeena96]

Dhruv,
As you know, I am using 26805 as mid on my EST build. What are your thoughts on dampers for it?? It likely wont play past 6khz. I was thinking green, 1cm from driver.

Also, I was wondering, as we know that damper position affects sound, is there a known relationship? Like 330ohm @3cm = 680ohm at 1cm, or something like that?

I would like to think that they dont have a relationship, so that I could slow driver's impulse without affecting response (to get warmth or tone) and vice versa (low pass).

The relationship of placing damper near and far is not about strength of damping of peaks...but the amount or angle at which it rolls off.

Near spout, it dampen peaks, less roll off
End of tube, rolls of happens, a specific angle is achieved which can shift peaks

Like ED29689 with green damper 6mm away, shifts its major peaking to 2.5kHz

ED26805 with white or brown, as its not as strong as ED29689


And it doesnt stop air pulse or impulse...it just slows down the air pressure..

Bass are slower than Middle freq and high freq.

 

[Ivan TT]

Wow, what a fantastic looking response! I feel that with playing around with tubing, we could get that LF bump down an octave, and it would be a good sub/woofer and a mid all in one. Great results!

edit: i mean a steeper curve, later on. Like 100hz instead of 250. Maybe it is not possible.

Well, the curve only tells half of the story.

What x4 RAF (but not x4 RAB, go figure) excels at is coherency - crossed multi-BA set ups have quite noticeable phase distortion/colouration; punch/slam - HODVTEC is kind of close, but it lacks weight; and with @stephensynanta16 adaptor HF extension is on par with WBFK (I previously used tubing of various diameters, it does reduce "air" a bit).

Very proud of this idea/build (if it was my idea, don't really remember), makes investment of $$ and time in this hobby soooooo totally worthwhile!

 

[dhruvmeena96]

Well, the curve only tells half of the story.

What x4 RAF (but not x4 RAB, go figure) excels at is coherency - crossed multi-BA set ups have quite noticeable phase distortion/colouration; punch/slam - HODVTEC is kind of close, but it lacks weight; and with @stephensynanta16 adaptor HF extension is on par with WBFK (I previously used tubing of various diameters, it does reduce "air" a bit).

Very proud of this idea/build (if it was my idea, don't really remember), makes investment of $$ and time in this hobby soooooo totally worthwhile!

That curve is just for comparison sake

Then this FR looks great
(Is it without damper...if it is....nice man)
Dark, coherent and detailed

I tried x4 RAB series with amp...
It does sound large and bass feels brandish(not boosted or bloated)....but it seems its very high impedance...

Audiophile Worthy......

 

[stephensynanta16]

For those who want to try the quad RAF/RAB adapter:

Type-A: https://drive.google.com/open?id=1FoYTHzfbGIvI9sE8iJny4qlmLIfIG1gr
Stack then glue those quad before putting it into the adapter. (FDM printer friendly, adjust the size/scaling a little bit)

Type-B: https://drive.google.com/open?id=1eVE2T0xO4y6JyWVGIqzKDunIYgbK8M0m
Put the BA one by one separately into the adapter. (DLP/SLA Recomended)

 

[et.haan]

I used it as treble driver, seemed pretty good to me haha. You'd probably need to stack a few of them together to get enough SPL to use a damper. 4 of these drivers is around the size of a DTEC.

Ill probably stick with ED, but that is really tiny. I bet they were intended for hearing aids, like the RAB

 

[dhruvmeena96]

Ill probably stick with ED, but that is really tiny. I bet they were intended for hearing aids, like the RAB

First of all

No driver is hearing aid or no driver is audio and music purpose

Its all about how you use


GR are good driver for decay less sound. When stacked, can give a tight punch.

 

[et.haan]

The relationship of placing damper near and far is not about strength of damping of peaks...but the amount or angle at which it rolls off.

Near spout, it dampen peaks, less roll off
End of tube, rolls of happens, a specific angle is achieved which can shift peaks

Like ED29689 with green damper 6mm away, shifts its major peaking to 2.5kHz

ED26805 with white or brown, as its not as strong as ED29689


And it doesnt stop air pulse or impulse...it just slows down the air pressure..

Bass are slower than Middle freq and high freq.

I know this about the dampers, I wrote about it a couple pages back.

However, 26805 is just as loud, what makes you say it is not as strong?

I thank you for your thoughts. I’ll try brown.

 

[et.haan]

First of all

No driver is hearing aid or no driver is audio and music purpose

Its all about how you use


GR are good driver for decay less sound. When stacked, can give a tight punch.

this is true, it is how you use it.

I need more money to experiment with weird drivers lol