Tapped Horn TH-121 build

[ZivkoF]

Some Freq. and SPL(dB) informations at input 2,83V for TH-121

Freq SPL (dB)
10.00 66.56
10.14 67.05
10.29 67.55
10.44 68.04
10.59 68.54
10.74 69.03
10.90 69.53
11.05 70.02
11.21 70.52
11.37 71.02
11.54 71.51
11.70 72.00
11.87 72.50
12.04 72.99
12.22 73.49
12.39 73.98
12.57 74.48
12.75 74.98
12.94 75.47
13.12 75.97
13.31 76.47
13.50 76.96
13.70 77.46
13.89 77.96
14.10 78.46
14.30 78.96
14.50 79.46
14.71 79.96
14.92 80.47
15.14 80.97
15.36 81.48
15.58 81.98
15.80 82.49
16.03 83.00
16.26 83.52
16.50 84.03
16.73 84.54
16.98 85.06
17.22 85.58
17.47 86.11
17.72 86.63
17.97 87.15
18.23 87.68
18.50 88.21
18.76 88.74
19.03 89.27
19.31 89.80
19.59 90.33
19.87 90.86
20.15 91.38
20.44 91.90
20.74 92.42
21.04 92.92
21.34 93.42
21.65 93.90
21.96 94.36
22.28 94.81
22.60 95.23
22.92 95.62
23.25 95.98
23.59 96.30
23.93 96.59
24.27 96.83
24.62 97.03
24.98 97.19
25.34 97.31
25.70 97.40
26.07 97.44
26.45 97.45
26.83 97.44
27.21 97.40
27.61 97.34
28.00 97.26
28.41 97.17
28.82 97.07
29.23 96.96
29.65 96.85
30.08 96.73
30.51 96.62
30.95 96.50
31.40 96.38
31.85 96.27
32.31 96.16
32.77 96.05
33.25 95.95
33.72 95.85
34.21 95.75
34.70 95.66
35.20 95.58
35.71 95.49
36.22 95.42
36.75 95.35
37.28 95.28
37.81 95.22
38.36 95.17
38.91 95.12
39.47 95.07
40.04 95.03
40.62 94.99
41.20 94.96
41.79 94.94
42.40 94.92
43.01 94.91
43.63 94.90
44.26 94.89
44.89 94.89
45.54 94.90
46.20 94.91
46.86 94.93
47.54 94.95
48.22 94.98
48.91 95.02
49.62 95.06
50.33 95.11
51.06 95.16
51.79 95.22
52.54 95.29
53.30 95.37
54.07 95.45
54.84 95.55
55.63 95.65
56.44 95.77
57.25 95.90
58.07 96.04
58.91 96.19
59.76 96.36
60.62 96.55
61.49 96.76
62.38 97.00
63.28 97.25
64.19 97.55
65.11 97.87
66.05 98.25
67.00 98.67
67.97 99.16
68.95 99.73
69.94 100.39
70.95 101.17
71.97 102.09
73.01 103.17
74.06 104.42
75.12 105.78
76.21 106.99
77.30 107.48
78.42 106.82
79.55 105.34
80.69 103.67
81.85 102.15
83.03 100.89
84.23 99.93
85.44 99.23
86.67 98.77
87.92 98.54
89.19 98.48
90.47 98.57
91.78 98.79
93.10 99.11
94.44 99.51
95.80 99.97
97.18 100.47
98.58 101.01
100.00 101.57
101.44 102.14
102.90 102.73
104.38 103.32
105.89 103.90
107.41 104.46
108.96 105.00
110.53 105.50
112.12 105.94
113.74 106.32
115.38 106.62
117.04 106.83
118.72 106.95
120.43 106.97

[ZivkoF]

Freq. & SPL(dB) chart is in 2,0 x Pi space.

[epa]

huge cab zivkof !
top is yours
bottem red sugestion vs yours.

edit/ added 1 more simpler

[ZivkoF]

Thanks epa for sugestion, it is OK and I might use it, I will see how complex the build will be, yes it is not small but it is more in the height H where I have more place as W or D. I have full horn system from 2-way Hi/Mid speakers with sensitivity 110 dB @1w/1m to low FLHs with sensitivity 108 dB @ 1w/1m and TH-121 willl be for sub low frequency!

[epa]

i would suggest xco1's or jbell ss15 fold,you can easely extend vertical to get the lengt desired.
if you need any help modeling something ,let me know.

[ZivkoF]

Originally Posted by epa

i would suggest xco1's or jbell ss15 fold,you can easely extend vertical to get the lengt desired.
if you need any help modeling something ,let me know.

Yes would need some help. How you model L12 (0,01) in the last Schematic Diagrame Volume of 702.009 Litres, where to face the front of the driver. I am thinking for smaller foot print 24-inch x 24-inch x 60-inch high or 71-inch high.

[epa]

Originally Posted by ZivkoF

Yes would need some help. How you model L12 (0,01) in the last Schematic Diagrame Volume of 702.009 Litres, where to face the front of the driver. I am thinking for smaller foot print 24-inch x 24-inch x 60-inch high or 71-inch high.

that one uses a chamber.
in case of a chamber or ported entrance of the horn system ,s1=s2.

your 70"version is 670 ltr!
as i explaned a couple of posts back ,if the hr sim is 700 ltr(system volume)
the real volume would become closer to 900 ltrs.!!
if you sym for 670 ltr cab(70" version) the sym must end up something like ~500 ltrs.>you end up with 93 db @2.83 v from 20 to 60 flat

[ZivkoF]

Originally Posted by epa

that one uses a chamber.
in case of a chamber or ported entrance of the horn system ,s1=s2.

your 70"version is 670 ltr!
as i explaned a couple of posts back ,if the hr sim is 700 ltr(system volume)
the real volume would become closer to 900 ltrs.!!
if you sym for 670 ltr cab(70" version) the sym must end up something like ~500 ltrs.>you end up with 93 db @2.83 v from 20 to 60 flat

Thanks epa, it will be 61cm x 61cm x 180cm sym for 670 ltr with real some 540 ltr. It will look like the below picture, is S1, S2, S3, S4 and L12, L23, L34 right?

[epa]

Originally Posted by ZivkoF

Thanks epa, it will be 61cm x 61cm x 180cm sym for 670 ltr with real some 540 ltr. It will look like the below picture, is S1, S2, S3, S4 and L12, L23, L34 right?

pretty much.
you should take the center of the hornpath for the l value's

[ZivkoF]

Originally Posted by epa

pretty much.
you should take the center of the hornpath for the l value's

Hi epa,


just change my plan I am making now Tapped Horn with 18-inch driver, 21-inch was to big. TH will be W 22.83 x H 49.21 x D 30.00 and the horn path will be some 15.47 feel long and for wood will use Marine plywood which is lighter weight than BB and it is first class wood any experience with Marine plywood.