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Old 30th January 2005, 01:20 AM   #1
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Default looking for information about Sub Horns

I'm thining about building a new enclosure for the sub in my car and I'm getting curious about horns. I"ve never looked into them so I know virtually nothing about them.

what are the drawbacks? are there any? I know they're a more efficient enclosure, but do they sacrifice any sound quality to accomplish this?

would this sub be a good candidate for a horn enclosure?
here are the specs.

Dimensions:
Frame Diameter: 10.5 in. (267 mm)
Mounting Hole Diameter: 8.74 in. (222 mm)
Mounting Depth: 8 in. (203 mm)
Overall Depth: 9.63 in. (245 mm)
Magnet Diameter: 6.55 in. (166 mm)
Pole Vent Clearance: 0.75 in. (19 mm)
Displacement: 0.09 cu. ft. (1.78 ltrs)

Enclosure Recommendations:
Sealed Range: 1.00 - 1.375 cu. ft. (28.3 - 38.9 ltrs)
Recommended Sealed Volume: 1.25 cu. ft. (35.4 ltrs.)
Fc: 44.7 Hz
F3: 40.7 Hz
Qtc: 0.785
Ported Range: 1.125 - 1.5 cu. ft. (31.9 - 42.5 ltrs)
Recommended Ported Volume: 1.5 cu. ft. (42.5 ltrs)
Recommended Tuning: 32 Hz
Port Type: “Slot” ports are recommended. See Data Sheet for detailed info


also, any links to write ups and the like would be great. Thanks guys
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Old 30th January 2005, 06:11 AM   #2
m_tunes is offline m_tunes  United States
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I am not an expert on horns, but i know they are generally best suited for large venue purposes where you want to propogate the wave in a concentrated, controlled fashion. Great for PA use, but in a car it would seem unnecessary and the benefit of a horn would not be realized because the space is so small.
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Old 30th January 2005, 07:36 PM   #3
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really? It won't be just in the trunk, it will be fireing into the cabin in place of the back seat. I know that's not a lot of air space when looking at PA systems, but it's quite a bit more than just the trunk.

anyway, even if this won't work I'd still like to learn a little more about them. Any links?

thanks again
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Old 30th January 2005, 08:21 PM   #4
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Sub horns in your car are possible. You typically dont see then due to their large size(alot of people arent willing to sacrifice all that space in their car!)
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Old 30th January 2005, 10:01 PM   #5
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This fits in a car trunk easily at 14x14x32 inches. Loaded with an eight.
Click the image to open in full size.

Your driver may be OK for a horn but the specs are incomplete. You also need to know Qes,Qms, Bl and xMax,
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Old 31st January 2005, 04:50 AM   #6
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cool, I'll go digging for them. That's just what JL had on their site.

about how big are we talking about for a 10?
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Old 31st January 2005, 06:28 AM   #7
simon5 is offline simon5  Canada
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It depends on which ten you want to use, but Bill have a plan of around 24"x24"x24" I think.
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Old 31st January 2005, 06:01 PM   #8
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that's not too bad. I'll get the specifics on the sub so you guys have a little more to work with.
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Old 31st January 2005, 06:15 PM   #9
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QMS - 7.647
QES - .578
BL - ?
XMAX - 23mm

The BL is not listed on JL's site. Can an enclosure be designed w/o this spec? What if I could give the specs of some of their other recomended enclosures (sealed and ported). Could you derive the BL from those enclosures with the others specs given with a box designing program?

Is there any loss of sound quality with a horn loaded enclosure as a general rule? I know some enclosures sacrifice sq for spl (as a general rule, not a blanket statement of course) in a specific range, is this an issue with a horn enclosure?
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Old 31st January 2005, 08:18 PM   #10
simon5 is offline simon5  Canada
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I put that in WinISD to have all the parameters:

Qes = 0,578
Qms = 7,647
Qts = 0,537
Fs = 30,6 Hz
Vas = 36,2 liters
Mms = 157,6 g
BL = 12,00650 N/A
Cms = 0,1717 mm/N
Dd = 22,16 cm
Rms = 3,96220 kg/s
Re = 2,750 ohms
Sd = 385,0 cm^3
Xmax = 23 mm
Pe = 500 W
Vd = 0,9 liters
n0 = 0,1747 %
Znom = 4,000 ohms
USPL = 89,22 dB / 2,83 V / 1 m
SPL = 84,58 dB / 1W / 1 m
EBP = 52,94 Hz
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