jbl gto804 tapped horn/ folded horn

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im looking to build a tapped or folded horn for a single 8" jbl gto804, ive built a tapped horn before for two 6.5" subwoofers and it works brilliantly, but it lacks in the low end, i dont know how to design them i had someone do one for me and i was hoping for the same again,
voice coil dc resistance - 3.49 (ohms)
voice coil inductance @ 1khz1.64 (mh)
driver radiating area 33.17 (in2)
214.00 (m2)
motor force factor 12.88 (tm)
compliance volume vas 16.42 (litres)
0.58 (ft3)
suspension compliance cms 251.00
moving mass, air load 115.00 (grams)
moving mass, diaphrahm 113.20 (grams)
free air resonance 29.60 (hz)
mechanical q 6.37 (qms)
electrical q 0.450 (qes)
total q 0.42 9 (qts)
magnetic gap height 3/8 (in)
9.00 (mm)
voice coil height 1-1/4 (in)
32 (mm)
maximum excursion 7/16 (in)
11.50 (mm)
 
how about an elemental designs 9kv.2 8"
[FONT=Verdana, Arial, Helvetica, sans-serif]Qts: .30
Qes: .38
Qms: 3.5
Fs: 23 Hz
Re: 7.4
Vas: 45 L
Mms: 71.4 g
Bl: 15.34 T*m
SPL: 86.2 dB
Sd: 231 cm^2
Xmax: 14.1 mm
Voice Coil: 38 mm
[/FONT]

[FONT=Verdana, Arial, Helvetica, sans-serif]Magnet Width: 4.800"
Cutout Diameter: 7.25"
Mounting Depth: 4.375"
Weight: 10 lb
Total Height: 4.900"
Displacement: .05 ft^3
Outside Diameter: 8.375"
[/FONT]
this woofers around the same price as the jbl
 
If sombody was twist my arm I'd build a new one, with a new/better driver.

What to look for, a low Q Sub woofer?
 

Attachments

  • TH build loose.JPG
    TH build loose.JPG
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ive got someone designing me one at the moment, the they said the jbl doesnt have a good flat response in a t-line or a bandpass but good response in a ported box, but i love the bass production of a horn, i didnt want to have to buy a new subwoofer if i had to, just make do with what ive got ?
 
yeah that jbl, the th i have now is brilliant for quite listening, but as i turn the volume up it doesnt perform idealy at louder levels, but then again im using cheap skytronic 6.5" woofers, they're 8ohms 125watts rms and ive got two in parralel, ive got the plans on sketchup but i dont know how to post them in here, its tuned to around 35hz and goes really loud and the low end, i'd like to use the jbl and tune it to around 30hertz or lower if possible without having a big box
 
Got any info on the skytronic woofers?
You can post the hornresp model text export in a
Code:
code box, that's the # tag in the advanced post editor
You can upload your sketchup model to the google 3D warehouse directly from sketchup and post a link here, it's under File>3D Warehouse>Share Model.
 

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  • 1X 6.50_ Kevlar Hi-Fi Loudspeaker speakers 902.423 | eBay.jpg
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This one?
yeah those, two of them.
for 11.99 each and there power handling i thought it would worth the attemp, they've held up good so far
I've got a pair of JBL 10" subs - GT1041. Works very well in a Bass Reflex. Outstanding performance. Dynamic and detailed bass.
im looking to do a tapped horn or folded horn, i prefer the bass from them compared to the rest, for listening to its clean, loud and most importantly low
 
If so we have?:
Code:
ID=28.80
Ang=2.0 x Pi
Eg=2.83
Rg=0.00
Fta=0.38
S1=120.00
S2=126.87
Par=17.50
F12=0.00
S2=126.87
S3=273.04
Par=215.00
F23=0.00
S3=273.04
S4=280.50
Par=19.00
F34=0.00
S4=0.00
S5=0.00
L45=0.00
F45=0.00
Sd=140.00
Bl=12.97
Cms=3.58E-04
Rms=1.25
Mmd=27.35
Le=0.80
Re=7.00
TH=2P
Vrc=0.00
Lrc=0.00
Ap1=0.00
Lpt=0.00
Vtc=0.00
Atc=0.00
Pmax=100
Xmax=5.0
Comment=SkyTronic
 
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