file J-bin reflex horn

7 years 3 months ago #18072 by Thawach
Replied by Thawach on topic J-bin reflex horn
hi bitzo i model it with Pa e15-300s. this drv use because i don't want the big size. a quick sim on hornresp. the -3 db can't reach to 50 hz. i want about 50 hz. its ok if u write to sim on akabak. just sent PM the link to u with my model. hope u can write akabak script recently.thanks

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7 years 3 months ago #18109 by bitzo
Replied by bitzo on topic J-bin reflex horn
here's my attempt. I recycled the mkt 30 script and customized.
Def_Const
{
thick=1.8e-2;

width=78e-2-2*thick;
height=77.5e-2;
depth=75e-2-thick;

anga=rad(12);
panela=32.5e-2;
panelc=12e-2-thick;
paneld=10e-2;
dpaneld=34.6e-2-thick;
hbaf=48e-2-thick;

angbaf=arctan((width-paneld)/dpaneld);
baf=sqrt((((width-panelc*2)-paneld )/2)^2+dpaneld^2);
panelb=51.5e-2;

wa=((width-panelc*2)*paneld)/2;
ha=hbaf;
lwa=(((panelb-dpaneld)+(panelb-dpaneld+sin(anga)*panela))*hbaf/2*width)/(hbaf*width);

h0=hbaf-cos(anga)*(panela);
h1=depth-panelb-thick-sin(anga)*(panela);
h2=depth-panelb-thick;
h3=height-hbaf;
h4=height-hbaf;
l01=sqrt((h0/2)^2+(h1/2)^2);
l12=sqrt(((h1-h2)/2)^2+(cos(anga)*(panela))^2);
l23=sqrt((h2/2)^2+(h3/2)^2);
l34=panelb+thick;

wf0=paneld;
hf0=hbaf;
wf1=sin(angbaf)*(baf/2)*2+paneld;
wf2=width-panelc*2;

conearea=(38e-2/2)^2*rad(180);
conevolume=4500e-6;
drivervolume=6500e-6;

vrc=hbaf*(
(panelc+(width-paneld )/2)*dpaneld/2
)-drivervolume;
Atc =hbaf*(baf); |Throat chamber cross-sectional area (sq cm)
lrc=vrc/atc;

vrc2=width*(
((panelb-dpaneld )+(panelb-dpaneld +sin(anga)*panela))*hbaf/2
);

Def_Driver 'Driver'

|paudio e15-300
Sd=830.00cm2
Bl=10.87Tm
Cms=2.2E-04m/N
Rms=2.73Ns/m
fs=39Hz
Le=0.73mH
Re=6.4ohm

System 'System'

Driver Def='Driver'
Node=1=0=4=10

Driver Def='Driver'
Node=1=0=41=11

Duct 'Throat chamber'
Node=41=5
hD={hbaf} wD={width}
Len={Lrc}
visc=0

Duct 'Throat chamber'
Node=4=5
hD={hbaf} wD={width}
Len={Lrc}
visc=0

duct 'throat'
node=5=49
hD={hbaf} wD={(width-paneld)}
Len={0.0000000000000001}

Duct 'Throat chamber'
Node=49=50
hD={hbaf} wD={width}
Len={Lwa}
visc=0

duct 'horn1'
node=50=51
wd={width} hd={h0}
len={h1}

waveguide 'horn1'
node=51=52
wth={width} hth={h1}
wmo={width} hmo={h2}
len={l12}

waveguide 'horn2'
node=52=60
wth={width} hth={h2}
wmo={width} hmo={h3}
len={l23}

Duct 'Port'
Node=60=61
hD={h4} wD={width}
Len={l34}
Visc=0

radiator 'Port'
Node=61
hD={h4} wD={width}
label=1


duct 'cone'
node=10=19
sd={conearea}
len={conevolume/conearea}

duct 'cone2'
node=11=19
sd={conearea}
len={conevolume/conearea}

waveguide 'fronthorn1'
node=18=19
wth={wf0} hth={hf0}
wmo={wf1} hmo={hf0}
len={dpaneld/2}

waveguide 'fronthorn2'
node=19=20
wth={wf1} hth={hf0}
wmo={wf2} hmo={hf0}
len={dpaneld/2}

Radiator 'Horn mouth'
Node=20
wd={wf2} hd={hf0}
y={h4+hbaf/2}
label=3

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7 years 3 months ago #18149 by Thawach
Replied by Thawach on topic J-bin reflex horn
thanks bitzo a little bit of pain on my head when see the lots of panel scripts. if have the free time ill put the numbers on the script. bitzo if this reach down to 50hz i had my fullrange design. think tha use in small job so that will use passive XO (i will design the next time). the problem is when combine with this sub. the fullrange reach down to 60hz. the problem is they work in the same freq if active xo i don't have any problem. if i run them the same freq i don't sure it will good. bitzo do u ever drive the same freq?. bitzo i ve the new idea the J-bin will work like kick bin. :lol:
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7 years 3 months ago #18155 by bitzo
Replied by bitzo on topic J-bin reflex horn
Now I get that you're a pro cab builder. So I don't think you need anything from an amateur like me.

Good luck smiley20

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7 years 2 months ago #18224 by Thawach
Replied by Thawach on topic J-bin reflex horn

bitzo wrote: Now I get that you're a pro cab builder. So I don't think you need anything from an amateur like me.

Good luck smiley20


bitzo i don't think im a pro. i like to be amateur like u. :silent: bitzo the new idea may be ill try. wave cannon camerra :P but very big. may be i make in home speaker by use a small drv.
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7 years 2 months ago #18225 by Thawach
Replied by Thawach on topic J-bin reflex horn
the new idea for 18 j-bin guys ill try to think it can be.
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7 years 2 months ago #18250 by bitzo
Replied by bitzo on topic J-bin reflex horn
sorry I don't want to make any ruckus, but if someone build some cabs for someone else and rightly payed for that, to me is a pro.

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7 years 2 months ago #18259 by Thawach
Replied by Thawach on topic J-bin reflex horn
it does not matter friend i don't worry about that. today i have the new idea again smiley2 u can see the pic.

and today i see lots of cloud in the sky in my city and sometime has lots of thunder. my thought change 2
1.the rain will fall in my city toady.
2.the rain will not fall in my city today.

the meaning that sometime:
1.think and do it in the furture.
2. :lol: think but don't do it.

may be tell friends i can't built at all.
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7 years 2 months ago #18260 by Thawach
Replied by Thawach on topic J-bin reflex horn

Thawach wrote: a few day ago my friend he wanted the dimension is smaller than this. i change a little. guys the new plan. i will paint the black color. the skin outside of this cab will be ok.


friends this cab i sim today. can't be finish now because try to make the saw table.
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7 years 2 months ago #18399 by Thawach
Replied by Thawach on topic J-bin reflex horn
again friens the small version @300watts that i sim and use filter @35-100 hz



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