Here is some feedback the designer received:

"This box Kicks ass! The finished box weights around 60Kg, it moves on its own!!!
No port noise whatsoever even at max power.To compare it kicks more and is cleaner
than our 186 horns".

[attachment=0]modif.gif[/attachment]

Is the Eminence Omega Pro18A compatible with this design?

Will this work?

Eighteen Sound 18LW1400
Size: 18"
Power Rating: 1000W AES
Frequency Response: 28-2.5kHz
Sensitivity: 98db
Impedance: 8 ohms
Voice Coil: 4"
Resonant Frequency: 31 Hz

OK SO...Build is complete and this bass cab is hitting nice and rich!
Anyone that is unsure on this build DON'T BE!!!
This bass cabinet is SICK!

Contact Marc he's the man!

tested @ recommended frequencies with house/dnb/dubstep and it is AWESOME!!!!

How about some pictures? Where did you put the access panel?
Thanks

i like the simplicity - has anyone moddeled any high xmax drivers in this - i.e. pd1850. ?

Right, this is so simple but the RCF is big money here.
I've looked at a load of drivers trying to match T/S but none in the cheapo bracket. Used PD/Fane is where its at for me.
Those that understand modeling this sort of thing, I have a couple of PD186 that need re-cone, what do you recon?
Don't mind knocking one up to try, lockup now void of snow, don't want to drill for PD if it's a big no no.
Perhaps its just the ported bit that would need re-doing?
I really think this cab deserves the attention due to it's simplness.
Hornsrep/Akabak gurus can you help???

nicky i have had a lot on this week i should have a lighter work load after weekend so i can sim something up then.....

Great. I'm OK with reflex stuff, really need a week free to sit down and learn the basics of horn simming. As to when....

HR input for this is......

S1 799.2
S2 800
con 33,70

S3 1443
con 17.20

S4 3141
con 59.30


VRC 139.20
LRC 29

AP 326.20
LPT 18

VTC 8400
ATC 1400

Thank you

S1=800
S2=800
con 36.40

S3=1449
con= 17.70

S4=3300
con 59.50

VRC = 149
LRC=29

AP=326
LPT=18

VTC = 4740
ATC=1411

OK, so which.
JJD are you the designer?

i would go with mykey's just based on his knowledge and the amount of cabs he has designed....

Mykey, why lrc is 100? the panel under the driver is 65...the total cab's depth is 75...am I missing something?

Why the Mickey sim is wrong:

The distance between driver diaphragm and event (LRC) can't be 100. Here is the schematic diagram of Hornresp:



And if you put 100, you shift delay and phase which create a gap above 100 Hz. On real horn, the LRC hasn't influence on this, but it will make a difference in hybrid horn.

Second error: There is no expansion from the first part of the horn. It's a duct ! There isnt't any need of measurement to see it just watch it:



So the first part of the horn is 56,4 * 14.2 = 800, and 800 is S1 and S2 !

JJD I have some doubt about s1, this cab have a letterbox throat, your sime in hr it's totally correct to me...Just IMHO but in akabak we have to split this section in 2 duct one of 22,2x36 lenght 1,8 and then the HR first section as you described. And then...if lrc is so important we need to change the hr conversion to akabak using the VB tag.

the letterbox is 22.2 * 36 = 799,2, same as S1/S2, so i think it can be consider the start of the horn

When you export Hornresp to Akabak, the rear chamber is simulate as a duct. The script describe a surface with a lenght, one node is rear driver diaphragm, other node is the event, by defaut, the event and the radiator are on the same plane, path lenght = 0 , exactly as Hornesp simulate. Try the comparison an play with the LRC value in akabak. When you put 100 in script, the gap in the response curve is the same as hornresp.

JJd i double checked your measurements and they seem ok. Bitzo when you export to akabak i have found that the sims can be way off on some box designs. I would sim by splitting section one into a duct then the horn from there as in S1 etc.

OK, that's that then
So what's a 186 like in there? Pretty please..

the 186 looks like this..........

Oh well, bloody horns.
Looks like Staips Mk3 Mini is going to get a trial
They've gotta go in something, new table saw on its way, mental spotnails staple gun and a new lock-up

and a lock up lol...... Im building a new workshop - storage shed at the bottom of me garden. i layed the foundations last week, picking up bricks tomorrow and will start build on tuesday...... ready for some spring building of speakers....

Bee, don't know how you obtain this curve, but this design is an hybrid with reflex event and you must add the event. There is a gap in your curve at 50Hz, this gap is the tuning frequency wich proves that you don't add the event

when you have calculate, and when you are in the SPL response windows, go to TOOLS, then COMBINED RESPONSE to add the event to the horn. Path length is 0

MHB+ PD186 =


Not really bad, but the original RCF 18N401 will be a bit better.

Hi Guys!
it was a sunday morning hangover

just edited the HR input

how did make the throat chamber volume of 4.7 litres?

not much difference in the 2 anyway

the front volume of the driver is near 2.5 litres (I think), and this volume is add to the volume of the circular hole in front of the speaker. but 4700 or 8400 in VTC doesn't make significant difference.

agree..but the letterbox throat have different width and height from the s1, in hr don't care but in akabak yes
yes but in akabak you can sim only 2 duct shape round or rectangular, then to compensate the difference hr put the arc value to me is better use the VB tag, in order to take care of the cone volume. By the way to me the vrc of this cab have to be simulated in 3 duct. In this way:
ops...don't coloured all the duct...sorry.
and then seeing the first revision of the plan we have to reduce the inner widht of the first part and the last part of the horn because of the bracing so would be 56,4-1,8 but I don't think it changes so much in the sim.. just pernickety

yes you're right, it doesn't make much difference in this design

also your volume, I drew this up in Autocad, and the internal volume of the rear chamber should be nearly spot on

@JJD, have you reduced for the volume of the driver has taken up?

with a standard 18'' ferrite magnet I normally use 11 litres, say 9 for a neo

the internal cone volume of a 18'' driver is roughly between 4-4.5 litres


the rectangular throat area is 22.2 x 36 x 1.8 = 1.43 litre

baffle hole/excursion plate is 42.2 dia 21.2 x 21.2 x 3.142 = 141 x 1.8 = 2.53
cone volume, 4/4.5 litres

4.5 + 2.53 + 1.43 = 8.46 litres for throat chamber volume

very little in the graph anyway between the two

I have updated the Full Size Plan with the latest revision of the design.

Sensitivity: 105 dB 1w/1m (half space 2pi)

Also check http://hornplans.free.fr/mhb46.html for some build pics and a lot of other designs.

Yes I have reduced volume of the driver. RCF say 5.5 liters for front mounting on 18mm thick board: http://www.rcf.it/fr_FR/c/document_libr ... E-2219.pdf

The 22.2x36 area is not throat chamber, it is the start of the horn.

nice to see a plan only for italian driver
however... JJD the rcf value for the cone don't fit in this case you have to add the baffle cutout volume. However don't change so much.

cheers jjd it was l8t lol...... i had my sleepy head on after the weekend. sorry guys for the wrong plot...

I have a lot of Italian friends here, and when I tell them that Italy make the best speakers they end up wit a big smile on their face

hi all

i have simmed different drivers in hr.iam getting weird phase resp
this is with 18lw1400.rcf18g401 is also giving the same.
resonant masked path difference 0.


thanks

ravs



be a vegeterian.......

for 18n401

as it has been said in the post, I think the start of the horn is in front of the speaker, so the model will be like this:

nice man play really good

i just got two mhb-46 built an these boxes are crazy

what's the tolerance with this sub??? The response plot looks quite crap, though the sub itself looks real cool esp the slot port.

jim mykey posted up the sim for this one using horn resp,S1 799.2S2 800con 33,70S3 1443con 17.20S4 3141con 59.30VRC 139.20LRC 29AP 326.20LPT 18VTC 8400ATC 1400have a play with the sim......

the MBH-46 seems very popular in France. It make a very strong kick in thorax, and like no other bass bin. Bass response is 50Hz in solo, with linear curve (no need of multiples bins like some horns).

i just need two of these boxes,to a function an i'm good

Is this Data input for Hornresp for MHB46 ok ? Because the SPL response is catastrofal... :D

ive not simmed this one, your sim looks very differant to mykeys,

S1 799.2
S2 800 con 33,70
S3 1443 con 17.20
S4 3141 con 59.30
VRC 139.20
LRC 29
AP 326.20
LPT 18
VTC 8400
ATC 1400

the results persists. Very bad grapfic plot.... i don;t hink that this are the real data input for hornresp for this MHB46

this is a very quick sim in horn resp showing the plott i came up with, using the same driver in your sim.



are you pressing the combined sim button!!!!!

this was done by using the sim mykey made, with a few changes it......

can u make a print screen of your input data for MHB46 ?
This is my input data:

SPL response with Selenium 18ws600

hear is mykeys sim, my sim, and your sim........ all with your driver.



hope this helps......

when u press calculate, you need to go to tools, and press combined responce, then click enter, dont add a value when it ask's.......

my sim and plott is below,

re-pm...... So, i must do " Calculate" and after that , tools-combined response, but it is not active.. it;s not highlighted.. How should i do the plot ? please tell me the steps, thanx a lot !


input all the info on the main screen,
press calculate
press yes
go to tools,
select combined responce,
press ok.....

you should have the same plott as mine, is using my info posted above.....

hope this helps.......

ok i have found out why you cant sim it....... has anyone else spotted the mistake.........

kentech has got one of the parameters set to AP1......... when it should be AP.........



change ap1 to ap, it should work ok now.......

ps... if my post seem like im rambling, sorry. Im helping out via pm's.... but thought this info may help others.........

just an update,
plott 1 below is marcs sim plott using the rcf lf18n401
plott 2 below is my attempt at siming this cab using the rcf lf18n401 using akabak
plott 3 below is my attempt at siming this cab using the Selenium 18ws600 for kenwood, again using akabak,

Does anybody have the cutsheet for this design?
I calculated the amount of ply for one, and I get 2 sheets with alot of waste.
How many sheets would I need to build 4?

download maxcut version2 its free to use, and is one of the best cut sheet design software there is (i think)....... link below

http://www.maxcut.co.za/

bee, did you set the port distance from ground?

ill double check m8t, cant remember off hand.... ill take a look over the weekend

Oke I want to start building these, as my ES18BPH's are a disapointment.
Anybody got a cutsheet for the MHB-46?
How many sheets of ply would I need to build four?

jerronimo check 4 post up......

Somehow missed that post...
Thanks though!

Update:
Nice and easy to use program, thanks for the tip!

I get 7 sheets for 4 MHB-46 anybody can verify this?