progress pix, took a bit longer to build as I had to keep stopping to go set up PA & do shows...I'm sure many here can relate lol
as a slideshow:
ImageShack(TM) slideshow
as a slideshow:
ImageShack(TM) slideshow
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nice .
if you want to go lower ,symply make a board over the mouth with a restriction.
if you want to go lower ,symply make a board over the mouth with a restriction.
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Hi epa,
Looks like this will become a nice thread 🙂.
I just took a look at your AkAbak script in Post #1, and there may be some errors in it.
In the keyed in schematic the driver should return to the horn @ node 19.
In the script for 'Horn segment 10' the nodes seem to be wrongly assigned, and the Radiator should not connect to node 19, but to 20? Also, you seem to missing a 'Horn segment 12'.
I'm no AkAbak expert, maybe somebody who knows what he's looking at can take a look at this.
Regards,
Looks like this will become a nice thread 🙂.
I just took a look at your AkAbak script in Post #1, and there may be some errors in it.
In the keyed in schematic the driver should return to the horn @ node 19.
In the script for 'Horn segment 10' the nodes seem to be wrongly assigned, and the Radiator should not connect to node 19, but to 20? Also, you seem to missing a 'Horn segment 12'.
I'm no AkAbak expert, maybe somebody who knows what he's looking at can take a look at this.
Regards,
Just started spl testing on first cab, no question...it's a real sub by golly 😀
My chosen method & tools: Cheap voltmeter, Radio Shack SPL meter, Apex 220 reference mic, Behringer mini mixer for mic pre, SmaartLive, QSC RMX 2450 Amp (the same one that will be driving these when installed). Used voltmeter to set 28.5V to the speaker at 100Hz, took reading with rat shack SPL meter at 10meters, 6" off of the ground (just above the grass) to establish a baseline & calibrated Smaart to that fed by the Apex in the same position, on a stand, 6" off of the ground. After that initial calibration I'm merely toggling frequencies in the generator & logging the readings. Not exactly lab accurate, but it should give usable real world numbers, right?
I will also hopefully have enough time to log one of my Cerwin-Vega T36-750 cabs in the same sitting to give a 'brandX' comparison. Ideally I'll post these results later tonight, right after delivering & installing these so I can also give subjective impressions of them in their final resting place playing music.
My chosen method & tools: Cheap voltmeter, Radio Shack SPL meter, Apex 220 reference mic, Behringer mini mixer for mic pre, SmaartLive, QSC RMX 2450 Amp (the same one that will be driving these when installed). Used voltmeter to set 28.5V to the speaker at 100Hz, took reading with rat shack SPL meter at 10meters, 6" off of the ground (just above the grass) to establish a baseline & calibrated Smaart to that fed by the Apex in the same position, on a stand, 6" off of the ground. After that initial calibration I'm merely toggling frequencies in the generator & logging the readings. Not exactly lab accurate, but it should give usable real world numbers, right?
I will also hopefully have enough time to log one of my Cerwin-Vega T36-750 cabs in the same sitting to give a 'brandX' comparison. Ideally I'll post these results later tonight, right after delivering & installing these so I can also give subjective impressions of them in their final resting place playing music.
Remember I built two of these at once. The first one involved all of the figuring out how to actually build, miscuts & recovery, & the like that comes with my occasional carpentry. The second went together to the actual spec...so cab 1 is solid & respectable in appearance, but tolerances were tighter on #2...#2 is louder across the spectrum, but both behave very well in subjective listening (no huffs/puffs/growls/farts/burbles/other sonic complaints). In fact, they came out wonderfully & they absolutely exceed the modest requirements of the venue.
Here are the SPL test results:
calibrated to 28.5vrms @ 100hz measured at 10meters
Hz dB
cab1 cab2 CV T36-750
25 80.9 83 79.1
26 82.5 83.5 80.6
28 84.5 85.9 83.4
30 87.7 87.8 85.5
32 88.8 89.7 87.6
35 92.2 92.5 89.7
37 96.3 96.5 92.6
40 101.1 101.6 98.1
43 102.4 103.6 97.5
45 101.8 103.5 97.5
46 100.8 103.1 97.1
47 101.1 103.2 96.9
48 101.7 104.2 99
49 102.3 105.1 100
50 102.3 104.7 101.1
51 101.2 103.9 101.6
52 100.6 103.3 101.7
53 100.7 103 102
54 100.8 102.9 102
55 101.4 103.3 102.6
56 101 103.2 103.1
57 100.6 102.6 102.9
58 100.3 101.9 102.1
59 100.8 102.2 101.5
60 101.2 102.8 102.1
61 101.7 103.3 103.1
62 102.8 104.2 104.3
63 103.7 105.2 105.5
64 103.5 105.2 106
65 103 104.6 105.3
66 101.5 103.3 105.2
67 100.6 102.3 104.6
68 101.4 102.6 103.7
69 101.6 102.9 102.1
70 102.8 104.3 101.7
71 104.2 105.8 102.5
72 106 107.6 105.1
73 106.8 108.6 106.4
74 106.7 108.7 106.9
75 105.6 108.2 106.8
76 104.8 107.6 106.3
77 104.1 106.6 105.6
78 104.1 105.9 105.2
79 103.9 105.9 105.5
80 104.7 106.1 104.9
81 105.3 107 105.2
82 104.3 106.6 105.8
83 103.8 106.2 105.7
84 104.6 107.3 106.9
85 104.5 107.2 107.9
86 104.3 107.1 108.6
87 103.7 106.7 109.4
88 103.6 106.5 109.8
89 103.8 106.3 109.7
90 104.3 106.7 109.5
91 104.3 106.5 109
92 104.6 106.4 108.5
93 104.5 106.2 107.8
94 104.7 106.1 107.9
95 105.5 106.7 108.2
96 106 107.8 108.8
97 106.2 108.5 109.3
98 106.2 108.8 108.8
99 105.2 108.1 108
100 103.8 106.9 107.5
101 102.8 106.1 107.5
102 101.7 105.3 107.4
103 101.4 104.2 106.4
104 100.1 103.1 105
105 99.4 102.1 104.4
106 98.7 101.4 105
107 98.3 101.3 106
108 98.2 100.8 106.4
109 98.1 100.5 106.5
110 97.1 98.9 105.8
111 96.7 98.5 105.4
112 96.6 98.6 105.7
113 96.5 98.7 106.4
114 96.5 98.5 106.7
115 96.6 98.5 107.3
120 95.3 96.8 107.1
125 98.4 99.6 107
130 101.1 101.1 106.7
135 105.9 106.3 107.2
140 109.7 110.8 106.2
145 106.6 109.6 104.6
150 102.5 105.8 109.1
And the final pix:
The ubiquitous vanity shot of me relaxing on the fruits of my labor
And last some pix of their final resting place, occasionally they dabble with putting bands on this patio, now they have subs that can support that without issue 😉
Here are the SPL test results:
calibrated to 28.5vrms @ 100hz measured at 10meters
Hz dB
cab1 cab2 CV T36-750
25 80.9 83 79.1
26 82.5 83.5 80.6
28 84.5 85.9 83.4
30 87.7 87.8 85.5
32 88.8 89.7 87.6
35 92.2 92.5 89.7
37 96.3 96.5 92.6
40 101.1 101.6 98.1
43 102.4 103.6 97.5
45 101.8 103.5 97.5
46 100.8 103.1 97.1
47 101.1 103.2 96.9
48 101.7 104.2 99
49 102.3 105.1 100
50 102.3 104.7 101.1
51 101.2 103.9 101.6
52 100.6 103.3 101.7
53 100.7 103 102
54 100.8 102.9 102
55 101.4 103.3 102.6
56 101 103.2 103.1
57 100.6 102.6 102.9
58 100.3 101.9 102.1
59 100.8 102.2 101.5
60 101.2 102.8 102.1
61 101.7 103.3 103.1
62 102.8 104.2 104.3
63 103.7 105.2 105.5
64 103.5 105.2 106
65 103 104.6 105.3
66 101.5 103.3 105.2
67 100.6 102.3 104.6
68 101.4 102.6 103.7
69 101.6 102.9 102.1
70 102.8 104.3 101.7
71 104.2 105.8 102.5
72 106 107.6 105.1
73 106.8 108.6 106.4
74 106.7 108.7 106.9
75 105.6 108.2 106.8
76 104.8 107.6 106.3
77 104.1 106.6 105.6
78 104.1 105.9 105.2
79 103.9 105.9 105.5
80 104.7 106.1 104.9
81 105.3 107 105.2
82 104.3 106.6 105.8
83 103.8 106.2 105.7
84 104.6 107.3 106.9
85 104.5 107.2 107.9
86 104.3 107.1 108.6
87 103.7 106.7 109.4
88 103.6 106.5 109.8
89 103.8 106.3 109.7
90 104.3 106.7 109.5
91 104.3 106.5 109
92 104.6 106.4 108.5
93 104.5 106.2 107.8
94 104.7 106.1 107.9
95 105.5 106.7 108.2
96 106 107.8 108.8
97 106.2 108.5 109.3
98 106.2 108.8 108.8
99 105.2 108.1 108
100 103.8 106.9 107.5
101 102.8 106.1 107.5
102 101.7 105.3 107.4
103 101.4 104.2 106.4
104 100.1 103.1 105
105 99.4 102.1 104.4
106 98.7 101.4 105
107 98.3 101.3 106
108 98.2 100.8 106.4
109 98.1 100.5 106.5
110 97.1 98.9 105.8
111 96.7 98.5 105.4
112 96.6 98.6 105.7
113 96.5 98.7 106.4
114 96.5 98.5 106.7
115 96.6 98.5 107.3
120 95.3 96.8 107.1
125 98.4 99.6 107
130 101.1 101.1 106.7
135 105.9 106.3 107.2
140 109.7 110.8 106.2
145 106.6 109.6 104.6
150 102.5 105.8 109.1
And the final pix:
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
The ubiquitous vanity shot of me relaxing on the fruits of my labor
An externally hosted image should be here but it was not working when we last tested it.
And last some pix of their final resting place, occasionally they dabble with putting bands on this patio, now they have subs that can support that without issue 😉
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
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hi oliver.
just like you im not an expert in akabak😀.
did you look at the actual script ,or did you look at the picture.
the pic is missing a few lines.
ill repost it in ful now.
exelent results,great job
greatz erik
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i see the flaw in the akabak script.
no time today to correct it,i look in to it later.
maybe the radiator must be 19 not 20?
no time today to correct it,i look in to it later.
maybe the radiator must be 19 not 20?
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Hi epa,
It'll help if we make a sketch (?). For myself I've started to call these nested tapped horns: tube-in-tube TH, or TITTH, maybe that'll stick?
Regards,
It'll help if we make a sketch (?). For myself I've started to call these nested tapped horns: tube-in-tube TH, or TITTH, maybe that'll stick?
Regards,
Oliver, thank you for taking the time to chart my data!
TITTH is a nice technical tag for these, I've been calling it 'onion fold' because I'm fond of silly intuitive names for projects 🙂
Ramsey
TITTH is a nice technical tag for these, I've been calling it 'onion fold' because I'm fond of silly intuitive names for projects 🙂
Ramsey
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i'm a bit busy with a big gig for the weekend.(yes i wil take some pics)
as soon as i find the time il make a schematik of my fold.
btw i like titths 😛
as soon as i find the time il make a schematik of my fold.
btw i like titths 😛
here is the schematic of titth ,the akabak script above.
also here are some pics of the gig.
center subs
endfire
amp racks
line aray
delay stack
foh mixer
foh fx
monitor mixer
monitor fx and stuff.
case's needed.
ive made a few impression movies.
turn the audio of ,because my litle camara couldn't handle those spl levels😱
light show test
impression 1
impression 2
impression 3
also here are some pics of the gig.
center subs
endfire
amp racks
line aray
delay stack
foh mixer
foh fx
monitor mixer
monitor fx and stuff.
case's needed.
ive made a few impression movies.
turn the audio of ,because my litle camara couldn't handle those spl levels😱
light show test
impression 1
impression 2
impression 3
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