Build your own 2x12" TH (The Kraken 212 TH)

[tb46]

Hi barco,

Thanks for the link, and all the pictures. Google translate did OK, but obviously it has its limits: "...The rather flick the base has never been snärtigare." (???), and for: "TACK PETTER!" it came up with "THANKS TOM PETTY!"



Regards,

 

[barco]

Hi barco,

Thanks for the link, and all the pictures. Google translate did OK, but obviously it has its limits: "...The rather flick the base has never been snärtigare." (???), and for: "TACK PETTER!" it came up with "THANKS TOM PETTY!"



Regards,

Nice

I have no clue on how to translate snärtigare, but it has to do with quick, tight bass. I was basicly saying that in that song I havent heard the quick base in the music be quicker on any subwoofer.

 

[bjorno]

Nice

I have no clue on how to translate snärtigare, but it has to do with quick, tight bass. I was basicly saying that in that song I havent heard the quick base in the music be quicker on any subwoofer.

Hi, Snärtig is = snappy, snärtigare= snappier? I believe the Kraken actually have inherit this attribute due to the very good IR, i.e. the main-pulse IR is as good as an FLH normally show up.

b

 

[bjorno]

FYI:

b

 

[tb46]

Hi bjorno,

Now that was snaertig. Seems that a properly sized tapped horn can deliver a very impressive bass.

Regards,

 

[eXa]

Ive used this sub for some time now(kraken 112), tho with the SVS 12.2.
I have not sealed of 2 sides (to be able to switch to the jbl driver, and maybe add dampening) so i know its not air thight, still i much prefer this over the old PB12+ case i used before. I cant hear the air leaks fom listening position (just behind the couch) and unlike the PB12+ it doesnt make any chuffing sounds down low.
I wont compare them more than that atm, since about the same time i build it i also bought a new reciver with audyssey XT32 (onkyo 3008) wich helped ALOT in my room.
Later when i get the proper jbl driver and a second amplifier to drive it i will put the pb12+ back in use and then i can do a much better comparison between the two, but that will likely take months.

 

[BP1Fanatic]

The Kraken's are a bit more integrated in my environment now

Added a front for the openings to make it more "stealth".

I have the sofsci measurement stuff now (+-2db 10-20 Hz, +-1db 20-20kHz) so I will be posting a more "correct" freq response shortly.

These horns are amazing. That the deep base could rumble a lot of things I understood, but the quick, clean and tight base for music surprised me.

Awesome build! Did you test with both mouths coupled together?

 

[barco]

Awesome build! Did you test with both mouths coupled together?

I did. It accidentally created a black hole on a higher volume!

No, I havent tried that. You mean turning them so the mouths are directly side by side?

To be honest I havent experiemented with placement at all.

 

[BP1Fanatic]

I did. It accidentally created a black hole on a higher volume!

No, I havent tried that. You mean turning them so the mouths are directly side by side?

To be honest I havent experiemented with placement at all.

LOL, yes!

 

[barco]

LOL, yes!

The reason I have them placed as I have is because of the reason I have two. Apparently having two subwoofers in a room is better than one (eliminates nodes and such). If I have them places with the mouths as wide apart as possible, it resembles more like two subwoofers instead of one big.

They are not to easy tomove around to try different positions either. They weigh more than 140kg (308lbs) each.

 

[bqc]

Kraken 112 SLP response

I entered the paramaters best I know how into Hornresp, and the SPL does not look very smooth, what am I doing wrong?

 

[bqc]

K112 SPL

I reenter the params changing conical to Exp flare and keeping the same values as one from K212 and the SPL is smoother. What is the number that is in the box for exp horn flare? It is not the distance as in the case of conical flare is it?

 

[speakrsrfun]

Just threw 2 Kraken 112's together(close to 4 sheets of material). I won't be hearing these for a while or until they are finished enough for my wife to allow them into the house but will throw 10W into them in the garage just to ensure there's no rattles or leaks. Just so people are aware, I used 3/4" stock and braces, and my cabinets before paint and finish are over 150lbs so they are heavy and require a second set of hands for moving them around. The build was straight forward and with minimal angles could be built by a newbie to woodworking no doubt. I'll follow up with the build once I start to lay paint. These are not your typical WAF approved cabinets just so you know, as my wife pointed out they could be used for a COFFIN if I'm not good...

 

[TundraLTD]

Got bored and threw this together, Kraken 212 Akabak script.

Copy below this line

System 'Kraken212'

Def_Const | Data for Vtc Chamber
{

Vtc = 1897.00e-6; |Throat chamber volume (cc)
Atc = 511.00e-4; |Throat chamber cross-sectional area (sq cm)

Sd = 511.00e-4; |Diaphragm area (sq cm)

Ltc = Vtc / Atc;
}
Def_Driver 'Driver'

Sd=511.00cm2
Bl=16.72Tm
Cms=1.56E-04m/N
Rms=3.41Ns/m
fs=28.0001Hz
Le=3.05mH
Re=3.76ohm
ExpoLe=1

Driver Def='Driver''Driver 1'
Node=1=0=9=34
Driver Def='Driver''Driver 2'
Node=1=0=6=33

Filter 'HP1'
fo=18Hz vo=1
{b2=1;
a2=1; a1=1.414214; a0=1; }

Filter 'LP1'
fo=80Hz vo=1
{b0=1;
a4=1; a3=2.613126; a2=3.414214; a1=2.613126; a0=1; }


Duct 'Throat chamber2' Node=6=10 SD={Atc} Len={Ltc} visc=50
Duct 'D1' Node=8=9 HD=32cm WD=13.09cm Len=14.71cm visc=50
Duct 'D2' Node=9=10 HD=32cm WD=13.58cm Len=33.55cm visc=50|D1
Duct 'D3' Node=10=11 HD=32cm WD=14.62cm Len=2.530cm visc=20|D2
Duct 'D4' Node=11=12 HD=32cm WD=14.71cm Len=3.740cm visc=10
Duct 'D5' Node=12=13 HD=32cm WD=16.52cm Len=5.520cm visc=1
Duct 'D6' Node=13=14 HD=32cm WD=16.45cm Len=4.590cm visc=1
Duct 'D7' Node=14=15 HD=32cm WD=15.10cm Len=4.560cm visc=1
Duct 'D8' Node=15=16 HD=32cm WD=16.80cm Len=5.560cm visc=1
Duct 'D9' Node=16=17 HD=32cm WD=17.21cm Len=3.780cm visc=1
Duct 'D10' Node=17=18 HD=32cm WD=15.52cm Len=110.3cm visc=1
Duct 'D11' Node=18=19 HD=32cm WD=20.08cm Len=4.710cm visc=1
Duct 'D12' Node=19=20 HD=32cm WD=22.52cm Len=7.510cm visc=1
Duct 'D13' Node=20=21 HD=32cm WD=22.38cm Len=6.070cm visc=1
Duct 'D14' Node=21=22 HD=32cm WD=20.98cm Len=6.060cm visc=1
Duct 'D15' Node=22=23 HD=32cm WD=24.64cm Len=7.930cm visc=1
Duct 'D16' Node=23=24 HD=32cm WD=24.63cm Len=5.980cm visc=1
Duct 'D17' Node=24=25 HD=32cm WD=22.33cm Len=127.28cm visc=1
Duct 'D18' Node=25=26 HD=32cm WD=30.60cm Len=7.390cm visc=1
Duct 'D19' Node=26=27 HD=32cm WD=34.57cm Len=11.17cm visc=1
Duct 'D20' Node=27=28 HD=32cm WD=34.89cm Len=8.010cm visc=1
Duct 'D21' Node=28=29 HD=32cm WD=32.54cm Len=36.95cm visc=1
Duct 'D22' Node=29=30 HD=32cm WD=36.31cm Len=8.960cm visc=1
Duct 'D23' Node=30=31 HD=32cm WD=42.16cm Len=13.53cm visc=1
Duct 'D24' Node=31=32 HD=32cm WD=42.74cm Len=10.23cm visc=1
Duct 'D25' Node=32=33 HD=32cm WD=39.95cm Len=18.46cm visc=1
Duct 'D26' Node=33=34 HD=32cm WD=41.86cm Len=33.33cm visc=20|D2
Duct 'D27' Node=34=35 HD=32cm WD=45.41cm Len=16.49cm visc=20|D1
Duct 'D28' Node=35=36 HD=32cm WD=47.16cm Len=74.39cm visc=1
Radiator 'Radiator' Def='D28' Node=36

 

[Petter Persson]

Great, Thanks!

 

[DrDyna]

Just a quick question, without reading the whole thread, was changing the mouth position something that can be done either way or was this a design change?

I'm considering building 2 of these, they're within my budget for my next sub project.

 

[Petter Persson]

barco did that with good result:

http://www.bredbild.se/horn/index.html

 

[DrDyna]

barco did that with good result:

http://www.bredbild.se/horn/index.html

So, would you say that a MiniDSP is required with that mouth position so you can smooth out the response?

 

[Petter Persson]

It depends where you Xover also, the lower - the less eq or none is needed.
The other persons who has built the Kraken has been very satisfied without
EQ. The upper resonances will be there with any mouth configuration.

 

[revboden]

Must resist building...

Must
not
order
drivers.

dang...

I ordered them.

edit: I do have testing equipment. So expect a complete test set and outdoor ground plane test in the coming months.
Any advice on stuffing would be appreciated, Maybe B could sim it. Please