- that K15 curve outdoor reminds me of "this" old graphic which saw long ago at Job Ulfman's Karlson speaker forum
MMJ - if the 115BK fudge is ballpark, then here's about what a4.25 cubic foot version (or Karlson K12) would do, shoved into a corner, vs a stock Klipschorn. A cone driven midhorn may be needed for balance (?) I don't have any free corners ! I wonder if 115BK's cavity shape factor and rear work to advantage at 12" cabinet size ??
Freddi ,
Your image from post #2161 reminds me of this image (below) that i made for the Super Planar tops to show general tilted trend of the response which favors the bottom end, makes a "house curve" that is easy on the ears ....
This is an old image.. I am now recommending drivers that are brighter than the PA310 .... Best 12" options we have found so far are the B&C 12MH32 and the Eminence Kappalite 3012HO .
Your image from post #2161 reminds me of this image (below) that i made for the Super Planar tops to show general tilted trend of the response which favors the bottom end, makes a "house curve" that is easy on the ears ....
This is an old image.. I am now recommending drivers that are brighter than the PA310 .... Best 12" options we have found so far are the B&C 12MH32 and the Eminence Kappalite 3012HO .
Karflex modeling with Freddi-Mod in Hornresp THIS IS NEW! =D
Freddi ,
My trusty old windows XP (32 bit) machine that i used for Akabak has been failing lately with random reboots and such so i have that one apart at the moment until i rebuild it, but i just discovered something that you are going to LOVE!!
I found this just the other day, a configuration in Hornresp that allows us to model Karlflex style cabinets with a Freddi-Mod stuffed stub in the front chamber (but no offset-driver section in the rear chamber) .... .
I will post the code here so you can take it for a test drive in your own Hornresp install ......I loaded this model with your Kappa 12a 🙂 . ... Notice that we are using the "Throat Ported" chamber option as the rear chamber and S1 and S2 create our Freddi-Mod stuffed stub , while S2 through S5 compose our front chamber .. .. Ap1 and Lp are the interchamber duct ...
There is no way to properly model a K-slot here so we can approximate the amount of loading using a large exponential flare in the front chamber but then of course the overall volume will calculate much larger in Hornresp than what the cabinet will actually be in the real world .. ... So that part is a "fudge" as you say , but the rest is solid 😀.
Freddi ,
My trusty old windows XP (32 bit) machine that i used for Akabak has been failing lately with random reboots and such so i have that one apart at the moment until i rebuild it, but i just discovered something that you are going to LOVE!!
I found this just the other day, a configuration in Hornresp that allows us to model Karlflex style cabinets with a Freddi-Mod stuffed stub in the front chamber (but no offset-driver section in the rear chamber) .... .
I will post the code here so you can take it for a test drive in your own Hornresp install ......I loaded this model with your Kappa 12a 🙂 . ... Notice that we are using the "Throat Ported" chamber option as the rear chamber and S1 and S2 create our Freddi-Mod stuffed stub , while S2 through S5 compose our front chamber .. .. Ap1 and Lp are the interchamber duct ...
There is no way to properly model a K-slot here so we can approximate the amount of loading using a large exponential flare in the front chamber but then of course the overall volume will calculate much larger in Hornresp than what the cabinet will actually be in the real world .. ... So that part is a "fudge" as you say , but the rest is solid 😀.
Code:
ID=48.00
Ang=2.0 x Pi
Eg=28.00
Rg=0.00
Cir=1.20
S1=200.00
S2=200.00
Exp=30.00
F12=0.00
S2=200.00
S3=403.00
Exp=30.00
F23=63.93
S3=403.00
S4=1429.00
Exp=25.00
F34=138.60
S4=1429.00
S5=2000.00
Exp=5.00
F45=184.05
Sd=519.50
Bl=15.32
Cms=2.91E-04
Rms=1.57
Mmd=36.17
Le=0.77
Re=5.41
TH=1
Vrc=0.10
Lrc=0.10
Ap1=200.00
Lp=1.00
Vtc=40000.00
Atc=666.70
Pmax=100
Xmax=5.0
Path=0.0
Mass=0.00
Re'=0.00
Leb=0.00
Le=0.00
Ke=0.00
Rss=0.00
Rms=0.00
Ams=0.00E+00
Fr1=210.00
Fr2=0.00
Fr3=0.00
Fr4=0.00
Tal1=79
Tal2=100
Tal3=100
Tal4=100
Comment=Eminence Kappa 12a 1x12" Karlflex (Freddi-Mod style) for Freddi by MMJ
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
FILTER
0 0.01 0.0 -1 0 0.01 0.0 -1 0 0.01 0.0 -1
0 0.01 0.0 -1 0 0.01 0.0 -1 0 0.01 0.0 -1
100 25 0 0
40.50.50.5
0.50.50.50.5
SSSS
1111
1011
0022
1111
111
000
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Freddi ,
I think we should be able to manage that 🙂
Check to see if the air particle velocity at the "throat port exit" stays under 20 meters per second when the 15" driver is given enough voltage to hit it's Xmax rating....
can you make a K-flex which behaves ok for Eminence's Delta 10a? I tried scaling the Kappa12a model by 0.92x and it did not look good at all. (-- have Delta10a in a "K10" size K with no front shelf and it sounds pretty good - but doubt if it graphs well)
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here's roughly xmax for a JBL M151 (~45v) stuffed into the example Karlflex
Freddi,
This looks like it will work 🙂
yeah - Delta 10a gives a lot of bang for the buck with 54oz magnet, 2.5" coil and reasonable qts.
this is what showed with Delta10a when scaling the Kappa12a Karlflex by 0.92 (and Rg=0.2 ohm)
so the chamber volume ~31 liters - maybe less would be be better if other things were different (?)
so the chamber volume ~31 liters - maybe less would be be better if other things were different (?)
if things get tough in the K-dept, there's always "this" (which could in some cases be "RJ-vented")
it looks better directly from the loudspeaker wizard - dunno what "100%" stuffing would mean in this case. The stuffed stub works
Right , we can see the effects of stuffing in the wizard ..... The 100% just refers to the placement (refer to the diagram in the wizard),we only want stuffing between S1 and S2 (which is our stub) . .
Freddi, well done, The Delta 10a is looking great in this cabinet
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can you tweak it a bit better? - that could be a fun little cabinet and Delta10a are cheap for what one gets.
here's MMJ's Kappa12A Karlflex scaled 1.2X for a JBL M151 (a driver I have) whether its a good performer for the bulk = ? What do you think?
-using hornresp's "Resize Wizard" (lossy Le must be "OFF" for it to open - thanks GM), its easy to compare a 1.1 to 1.2 scaling of MMJ's Kappa12 Karlflex model. Which if either makes the most sense? In-between size? - a smidgen larger than "1.1X" ??? I like a lot of punch and small cabinets. (damn that Hoffman's IRON law - lol)
it would be nice if a K-tube could internally mount to the kontraption
it would be nice if a K-tube could internally mount to the kontraption