Elliot Thompson wrote on Thu, 05 August 2010 06:19 |
Paul Walters wrote on Thu, 05 August 2010 05:45 | Ok so I think I've settled on the medium vented box for a single Kilomax at this point. Eminence has cab designs on their web site and the medium box has the best combination of spl and frequency response for me. However, they don't have any plans for this enclosure anywhere that I could find, just specifications.
I have spent two days combing the internet for vented box plans and I'm getting fairly desperate. I've found tons on scoops, horns, and bandpass enclosures on sites like freespeakerplans.com and speakerplans.com. Horn loaded subs would be great if I had the right drivers and carpentry skills for producing them (in the amount needed to make them sound beautiful, 4+ cabs) but I don't.
This will be my first build and I really just need something basic. A front loaded single 18 medium vented box, from Eminence: "KiloMaxPro 18A Med Vented Subwoofer By Jerry McNutt, Eminence Speaker LLC Limit to 700 Watts; F3 of 37 Hz. Use a steep high pass filter set to 35 Hz to protect your woofer. Place ports symmetrically about woofer.
Box Properties --Description-- Name: Type: Vented Box Shape: Prism, square (optimum) 6 --Box Parameters-- Vb = 7 cu.ft V(total) = 7.59 cu.ft Fb = 38 Hz QL = 7 F3 = 37.96 Hz Fill = minimal --Vents-- No. of Vents = 4 Vent shape = round Vent ends = one flush Dv = 4 in Lv = 8.282 in"
If any of you guys know of any plans for an enclosure similar to this can you post them? I'd be extremely grateful.
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Hi.
You have all the vital parameters. All you need to do is build a cabinet that offers a total of 7.59 cubic feet.
The reason there are no plans available is due to giving the user the option to design it how he/she desires.
You can make it very tall and, shallow, short and deep, or somewhere in between. The only thing you need to make sure is the cabinet’s outer dimensions equate to 7.59 cubic feet.
Download WinISD Pro scale a 7.59 cubic foot enclosure and, manipulate the dimensions to your requirements. Eminence has already taken care of the math. All you need to is scale the cabinet to your requirements, and make sure the total outer dimensions equate to 7.59 cubic feet.
Best Regards,
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V(total) is the total volume of the interior, not the exterior of the box.
The Vb is the volume of the box less the volume the ports and speaker take up in the box.
When using large ports, the port volume may be significant.
Front loading or rear loading speakers also makes a difference in the internal volume, so should be specified.
Wall thickness, recesses on the front panel for a grill frame, handles, bracing will make the box gross dimensions larger than V(total).
When designing portable boxes it is a good idea to make dimensions integers of truck box size.
Common straight trucks have 90 inch interiors, so 22.5, 30, and 45 inches are good to use.
Wide semi trailers will take 96 inches width, so having a 24, 32, or 48 inch dimension mixed with the 90 inch integers allows dense truck pack in either.