Mogale SuperScooper with PD 185c003 - question

If he is keeping the Super18s he built, he'll need to do homework regarding drivers that perform well in <50L Scoop chamber.

Obviously the number 1x candidate here is the Void V18-1000.

Feedback on the Forum, confirms B&C 18TBX100 also plays well in the cab, but with BL=25, and Xmax=9mm, don't expect the building shaking performance.

4x V18-1000, powered by Void Inf8mk2 amp, in Superscooper 18 cabs, tuned by right pre-amp, will provide shocking sub depth and SPL, but by nature of the cab, sub "sweet spot", will probably be about 20M distance.

sorry, have to disagree with  your claim that supers and polar bears are "the same shit"!

I don't claim to know the "top scoops", but your way of trash talking polar bears is unqualified. In the thread you linked there is not even a direct comparison  between super and polar

Polars are larger, and the internals are different. Standard supers choke and create a mushy mess below ~42 Hz, indistinguishable muddyness. I've heard Mikko's original Polars and others, and they do warm and defined 30-40 notes. 

Sinai Sound wrote: Right then Graphs This is 4 x polar bear scoops measured outside Single double 21"

The graph you based your slander on is actually not bad at all if it is half space, flat processing (except for hipass). It slopes gently down 5- 6 dB from 70 Hz to 35Hz. At 35 Hz there is a knee in the response, from there it drops another 4 dB going down to 30 Hz.

So it is 10 db down at 30 Hz. The sublows can be boosted within reason to make up for the apparent sensitivity loss, which is actually caused by increasing impedance, and less amplifier  power being dissipated in that range. 

Stack of supers will be a lot worse.....

After all, how many times has it been discussed how two scoops of same external size will perform very differently, due to the chamber & throat tuning, expansiom rate etc........

I start to sound like Lev 

DubHouse wrote: Ok so i will go to pd 1852/2 as you tell me, it will be better choose.

I am not suggesting PD1852 for Standard Superscooper, would suggest Void V18-1000 or B&C18TBX100 for that.

DubHouse wrote: One more question. Could i have 2 classic super scoop bins and 2 modified? If i set it in configuration CMMC which mean (c- classic/ m - modified) it will play good ?

Having different Scoops/differently loaded Scoops is for novices, who don't understand the problems this causes:

• Either sell the 2x Superscoops you have made, and make 4x of the Mykey "Scaled up Scoops", and load with PD1852s, etc.
  
• Or make 2x more standard Superscooper 18s, and load them "ALL" with Voids.

That's my suggestion.

To obtain maximum SPL, low extension, power handling and control, sophisticated engineer, will always match driver to intended cab, by ear/testing, or shortlist intended drivers, by how well TS Parms match cab chamber, throat.

PD1850 provided legendary historical performance in its time, but put it in the wrong cab, result was mediocre, to awful.

Benelr wrote: Thanks. Do you have any reccomendations on how to roughly match the SPL of 2 v18-1000 loaded super scooopers to the kicks and mids and tops of a sound system? (I know the fine tuning is done at the end)

What I have always done, is time align using LMS, to horn length of the Scoops.

E.g., if Scoop horn length is 2M, and reflex kicks used, delay kicks by 2M.

If Mid tops has 12" front horn flare of 60cm, delay by 140cm, and similiar for the compression driver flare.

Not all will agree, but I did this for years, for many gigs, inside and out, then simply balance SPL from each section, using amplifier gains, LMS limiters per band.