what mini scooper 18?

oups that was a typo in the title, corrected.

s1=750
con=100
s2=1951
con=50
s3=1951
atc=1400
vtc=85000

you have tu substract magnet and cone volume from vtc

85ltr. - cone/magnet volume already substracted

ops, you're right. just copied and pasted from hornresp.dat

Stipe, on SP you write that the rear chamber is too big....so what do you think to add brace panel like the optional panel B in the bull-x miniscoop?

I've built these. Two things are paramount:
You need to use double front baffle.
You need to make panel B double and extend the front one by 70mm.
I also changed the bracing between the front baffle and rear baffle. I used two lots of 18mm @100mm layed face down. I did this top and sides.
All this gets the driver under control and sounding great.

Hello to everyone,

As first version of MS18 was designed only by sim to explore or define border between BR and horn mode. First model with too large chamber relied more on BR mode which at the end have resulted with insufficient cone control and required modification to make it work.

Due to that problems and due to fact that we can never have enough "mini scoops" in a world I had "obligation" to make second version based purely on rear loaded horn mode - approach.
I have tried to maximally simplify building / panel cutting but without compromising intended design.

If you check MKII plan closely you will see that all panels are dimensioned at nice "round" numbers and that
there is few panels that share exactly same dimensions (panels "B" and "G" , panels "D", "E", "F") , same width of "throat panel T" and chamber braces, same height of "horn braces" as panels "B"&"G") ..and only one "nonstandard" angle side-cut (8degrees at panel "C") - all other is pure 90degrees or 45degrees for corner pieces.
All intended to make panel preparation and building easy as much as possible - I think .

However this one is still NOT BUILT OR TESTED (which was also case with MKII and what resulted with unsatisfactory results without modifications) ..so before first relevant testing is done any potential builder may be volunteer "beta tester" and I really can't claim anything.
..So at the moment published only for those who can spend some wood+ time for test. Sims says that all will be nice now (But who believe sims any more ... ...... )

Eh , and plans:




Best wishes,
Stipe

.. if chosen driver require very small chamber this can be easily Mk3-ed.

amazing plan so DIY friendly at all.
any chance of a full version?

ehh.. if I am going to build serious classic full size scoop that will be something like this:



..no big philosophy ..just Real Scoop

tasty!
jbl with double baffle, batterns all over, double cross brace, and some giant braces too...uhmmm some changes in the angled braces I think?
when it will be finished will looks like a tank.

cheers

That is one good looking scoop.

I'll try and do a prototype mini when the weather changes. Maybe drop off in London for some tests, we'll see
If some form of simple way of doing the curve on the big version can be implemented I'll do a big one. Don't mind trying some mdf ones.
I can do the curve but don't really have the time/space and the less time I spend bending over the less I go to the chiro

Thoughts on doing this??[attachment=0]miniscoopms18maaa.JPG[/attachment]

Any opinions on this mod in general?
I noticed it on some commercial cabs recently.

by cutting the corner would this make the sound waves travel smoother around the horn........

the mod may add some negative expation in the bend, you may want to make pice H longer to stop this it may also shorten the horm by a couple of cm but not noticable i wouldnt of thought

What's another good driver(Cheaper)for this plan???

Use the Mk3 then you should be Ok with PD186, Fane XB etc.

@ Stapier- noticed a while ago you had a horn extension plan for this. I can't find it

IF the weather changes (ever) I'm going to try a 186 in these. I think I'll do Mk2, or maybe Mk3 with single front baffle...
I built the orignal Mk1, well documented after a small mod. They are still around loaded with TurboMax, based on my experience with the Mk1 with V1200/PD1850 and TM I recon the 186 will be fine in Mk2, so long as your sensible. I'll add some front baffle to rear baffle braces, 50mm x 50mm to eat a little chamber size.
Drivers in the States? Somebody has to chuck an old Emmi Kilomax in one to see?
Mk 1 below was modified with extra rear baffle extended by 70mm (not shown)

@Staip, could you please technically detail "the true" benefits of the acoustic wool suggested, and the reasoning for suggested placement.

My Rhino Mk2 sounds great without it, but I spoke to someone yesterday, and he mentioned "an expert" directed him to place the wool at specific locations in the chamber.

Bump this question

Regarding acoustic wadding, I recently tested with and without. I didn't listen to actual music as I was measuring at 5hz intervals and recording the results. Both responses were identical.
The only cab I would definately put wadding in is a mid range cab. This would be to kill the smaller waves that break up in side the cab and come back on the cone to produce peaks and dips in the response.

The only reason I put wadding in my bass reflex boxes is to lower Fb apart from that it has bugger all use. I also stick it in mid-tops where it may be useful in reducing the standing waves etc.

Tony

Really for normal use there is no need for wadding in chamber.

Here it was intended to Hi-Fi-lise their sound a bit if someone use them with higher than ideal crossover point - kill buildup of potential 1/4wl resonances (honking) caused by dimensions of chamber which can sound ugly through horn.

However in normal/proper PA use there is crossover set far below freq. range where those resonances may occur (there may be only some harmonics up but they will make sound a bit "dirtier" which in PA world may be perceived as "natural" and additional SPL )

I have not build or tested them so wadding is "placed" here just to make em a little bit more foolproof at start

Best wishes

good designs won't need it

you're talking about the Ligwa cab Lev? OOPPPSSS!!!!!!

this "miniscoop" will not perform any worse without wadding (once when someone build some ) than proven good design
..but this was way it is just a bit more forgiving at slight misetup and will sound a bit more Hi-Fi when used on non PA situations (small power) because some upper resonances are attenuated before entering horn and interfering with front cone radiation.

I have experimented with in 15" MicrosScoopes and at that fine touch with a bit of wadding is noticeable (have compared two sets of 4 in stack). Completely identical drivers and wood .. at most music it is not noticeable at all but at some very delicate gigs I liked more sound from "wadded" stack.

point is same and will do same thing at good and bad designs ..try it you will see

top corners of chamber ?

Has anybody used this for Techno/House/Hardstyle/ Live bands?

How high can this be used to, is a kick bin needed? also has anyone got any sims?


Cheers

Scoops and mini scoops have their own sound. Mainly use for reggae due to the massive sub content, now dubstep etc also have this.
Techno: Definatly not, build lots of ES18-BPH IMHO

yaah, diz is a gud 1 design, m used diz design wid sosaudio group india... better response and easy 2 carry... we makes 100 units on dis month and 54 are sold already.. will i try 2 upload pics later.

you shouldn't tell us things like that

that why I don't give away free plans anymore

the parasites of the world have enough

Prashanti, should be so nice if you give some fee to the designer, proportionately to number of the selled cabinets.

watch the parasite disappear now

he probably won't sign in again, he'll just hover and think........look at these ch----, I'm making lots of money from these Western people, they give things for free hehe

Fekkin Tossers

http://www.tradeindia.com/Seller-267980 ... oup-india/

just to know who mr. stipe have to ask

[/qoute]Prashanti, should be so nice if you give some fee to the designer, proportionately to number of the selled cabinets.[/quote]

Has anyone had any experience with these loaded with fane 18xbs? thinking of building 2

Please take a look to these guy's. Canadian guy's Who built enclosed and speaker driver.http://tr.ca/ JF