9 months later it is about time these speakers had a cabinet. Here's the plan and the reports for 10deg normalised horizontal.
Code:
; -------------------------------------------------------
; Enclosure Setting
; -------------------------------------------------------
my_plan = {
point P0 166 0 12
point P1 184 18 8
point P2 184 30 24
point P3 63.79 293 24
point P4 45 300 24
point PB 0 300 24
cpoint C1 166 18
cpoint C2 -163.8 30
cpoint C3 45 271.3
arc P0 C1 P1
line P1 P2
arc P2 C2 P3
arc P3 C3 P4
line P4 PB
}
Mesh.Enclosure = {
Plan = my_plan
Spacing = 0,20,0,344
FrontResolution = 24,24,24,24
BackResolution = 24,24,24,24
}
; -------------------------------------------------------
; Measurement Settings
; -------------------------------------------------------
Mesh.VerticalOffset = 0
; -------------------------------------------------------
; Mesh Setting
; -------------------------------------------------------
Mesh.AngularSegments = 56
Mesh.LengthSegments = 20
Mesh.ThroatResolution = 2.5 ; [mm]
Mesh.InterfaceResolution = 7.0 ; [mm]
Mesh.InterfaceOffset = 5.0 ; [mm]
Mesh.ZMapPoints = 0.3,0.5,0.5,0.95
Mesh.SubdomainSlices =
Mesh.Quadrants = 14
; -------------------------------------------------------
; ABEC Project Setting
; -------------------------------------------------------
ABEC.SimType = 2
ABEC.Abscissa = 1 ; 1=log | 2=linear
ABEC.f1 = 20 ; [Hz]
ABEC.f2 = 16000 ; [Hz]
ABEC.MeshFrequency = 1000
ABEC.NumFrequencies = 40
ABEC.Polars:SPLTH = {
SID = 0
MapAngleRange = 0,180,72
Distance = 3
NormAngle = 10
Inclination = 0
}
ABEC.Polars:SPLTV = {
SID = 0
MapAngleRange = 0,180,72
Distance = 3
NormAngle = 10
Inclination = 270
}
; -------------------------------------------------------
; Output
; -------------------------------------------------------
Output.DestDir = "C:\ath4" ; current directory by default
Output.STL = 0
Output.ABECProject = 1
Report = {
Title = "my plan"
Width = 1200
Height = 800
NormAngle = 10
PolarData = SPLTH
}
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A smooth GCurve profile and lots of tweaking for a year or so. The "my_plan" curve on the front baffle now follows a close approximation to recent experiments with R-OSSE.
A slighly more eliptical front baffle to side cabinet profile yields a smoother "numerical result"
400 to 16k horizontal
-3dB point thick black line
30deg off axis on right
normalised to 10 deg
400 to 16k horizontal
-3dB point thick black line
30deg off axis on right
normalised to 10 deg
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May end up looking like, with a ring around the 18" also.
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additional charts to post 88,
1k to 10k - DI slope at appox 4dB
1k to 10k - DI slope at appox 4dB
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How are you going to manufacture the MT baffles?May end up looking like
Gel coat / grp. then bond in a plywood back.
https://www.diyaudio.com/community/threads/ath4-waveguide-inspired-multi-way.384410/post-6978689
I machined the tool so I could swap out the wave guide part of the mould easily.
https://www.diyaudio.com/community/threads/ath4-waveguide-inspired-multi-way.384410/post-6978689
I machined the tool so I could swap out the wave guide part of the mould easily.
Just finished the cab design. So will start cutting maybe at the weekend.
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