"Polar Bear" Scoop build

levyte357 can you guide me to the superscooper alternative ?

thank a lot

Edited by deepstonesound - 26 September 2025 at 2:04pm

jammin75 wrote:

https://forum.speakerplans.com/fane-scaled-up_topic74640_page1.html

try these

The precise plan I was talking about.

personally suggest the Superscooper 18 for Void V18-1000s,

The Mykey "Scaled up Fane", for everything else.

The "Knowledgeable", will modify Mykey plan, to suit their driver of choice...

Global Depopulation - Alive and Killing.

I'm planning on building four scoops too for dub and dubstep and its clear that polar bears are not an option. I already have 4 pd1850/2 but will probably upgrade later. Would mogale or mykey be better?

In what way does it compare to mogales? Because for me it's very important that in a group of 4, it can reach around 30hz and has good SPL. The Mykeys look easier to build too as I don't have to do the curved sections.

Sypa wrote:

If you don't want to build and maybe buy new scoops check out the stakx scoop it has a bit of wizardry in the chamber and a bit longer horn.

I've known Frederik for many many years now and we both respect each other and our skills from what I can tell.

From knowing the internal structure of the scoop he's got, there's nothing super complicated going on. What's happening is shuffling things around to basically circumvent that otherwise fixed width-wise dimension. With the split entry to the horn, you don't really change the behaviour -- not at these frequencies. You could move them all to one side and they'd behave the same as a horn.

But not in the chamber as horn throats! If you'd merge them you'd get a different response *because* of the fact the speaker is in a chamber that has its own feelings and thoughts err physics too.

So this split throat, extra extension of that tube, and so forth allows:

- Allow the total cross sectional area of the throat/entrance to be smaller
- ^While not restricting the outflow to the horn of the lowest frequencies (the aspect ratio of the tubes is responsible for that)
- Circumvents the part where in older designs, the chamber and throat are otherwise very indistinct, so making the throat larger would actually steal part of your chamber too. The size of the opening you need for large bass waves to pass through in say a superscooper would make the cross sectional area so huge that it also poses lower resistance to the driver.

- Hence this allows the higher compression ratio and driver control of a smaller throat entry, without the compromise on your low end you'd get from a very wide, but narrow in height slot of a superscooper.

Does this help with the "special magic"? It's not complicated or advanced new acoustics. It's just a case of cleverly rearranging the cross sections and such, and observing that doing as such (and as done in the SH118) slightly decouples the chamber size and behaviour and the compression ratio and the side effects of narrowing the opening of your throat (which is your only way of reducing the cross sectional area total with a fixed width!)

If that still doesn't make more sense, then.. I can't help, but I can give other examples of speakers that have done this. Say, the Jensen Imperial with its internal left and right exits out of the chamber that then merge into a large horn.

(I lost track of my train of thought forgive me)

mchw wrote:

I'm planning on building four scoops too for dub and dubstep and its clear that polar bears are not an option. I already have 4 pd1850/2 but will probably upgrade later. Would mogale or mykey be better?

Firstly, I would suggest selling the 1850/2 now, and getting 1851s.
Only driver I liked better than PD 1851s, are 18NLW9601.

I would suggest the Mykey plan, 738mm depth version. with following mods,

Make cab 636mm wide,
Reduce front baffle depth from 36mm to 18mm

Global Depopulation - Alive and Killing.