Eminence Kappa
when speakers, how to calculate the volume?
I am planning to build a speaker cabinate two Eminence Kappa 12a speakers and a framework regional cooperation Titanium 850 driver. He speaks on behalf of the Eminence speaker called for a volume of 112 liters. Since I have two speakers have the volume needed to double? Drivers Do you also require a specific amount of volume. I can, t find a lot of volume for the driver specifications.
I have provided links to all data sheets drivers you need to start designing the cabinet and the construction process. (Note: where possible, is always much better speaker design using Thiele-Small parameters from measurements of first-hand driver after a rigorous period Production, instead of relying on those provided by the manufacturer of the controller.) Using high EBP drivers like Eminence Kappa 12 you can get the best results by ventilation building a "box" designed for a maximum safe level Butterworth-or near full-plane alignment, the fourth-order (if Q assumes an enclosure, ie Q.sub.L equal to 7.) You can get the necessary speaker box design parameters: (a) pictures of one of the design publications popular speaker, highly recommended as the Design Cookbook by Vance Dickason speaker, (b) one of the online calculators speaker box, or (c) acquisition and / or download loudspeaker design software. In addition to a copy of the cookbook speaker design, I recommend you download a software design free speaker (as WinISD Pro) that I have provided links * in the resources listed below. You can also try using Eminence Designer Design Program speaker box but you may get better results using one of the other software applications. Under the procedures (b) or (c) simply plug in the Thiele-Small parameters obtained from the manufacturer's specification sheet (or better yet their own measures) in the calculator or software design of the box necessary. I recommend that you allow multiple Eminence Kappa 12 drivers to share a single volume cabinet. If you are using tables then multiplying the volume enclosure internal calculated (V.sub.B) for a single driver for 12 Kappa Kappa total number of 12 drivers sharing the same enclosure volume, ie, the volume of the enclosure by two Eminence Kappa 12 drivers will be double that of a single conductor. (Note: 112.1 liters internal volume is NOT recommended enclosures for a single driver Kappa 12 however, is used to calculate the proper enclosure internal volume.) Depending on the amount of internal reinforcements and absorption of sound is used, it should increase the total estimated volume enclosure internal (V.sub.B) for approximately five to ten percent (5-10%) to compensate for any reduction in volume due to internal protection components and as a design safety margin. It is important to note that when starting with a large enclosure is much easier to optimize the internal volume of the 'box' (V.sub.B) pasting blocks carefully manufactured with MDF, plywood, or other rigid material closed cell foam inside the enclosure to (incremental) to reduce internal volume. Consequently this allows you to adjust the resonant frequency of the enclosure, while a lower enclosure set-up would be very difficult. However, if you built a prototype wood and fiber as I suggested below, then you can ignore more than increase the size of the volume of internal speaker box boxes final plywood. The following are a few more loudspeaker design and construction notes for consideration. If you are mounting for portable speakers (Laptops) use the pro sound I recommend using the industry standard 3/4-inch (19mm) or 18 mm high-grade, without vacuum, birch plywood 13 layers, Baltic sea or during construction of speakers. If required prototype of a single speaker panel medium density fibreboard (MDF) before proceeding the material more expensive plywood. Do not skimp on internal reinforcements, which must be made no less than 1/2-inch (13mm) Baltic birch plywood. Braces are not partitions should be used and therefore should contain a broad cuts to allow air movement; shrouds and glue all the reinforcements in place. You must have at least one wall to wall reinforcement between each driver within its walls. (Please see the resources listed below for a link to an example of interior, wall to wall bracing.) Choosing vents vents I recommend using no less than 4 inches in diameter with flares at both ends of the ventilation duct. (Please see the following resources for more information.) If you intend to use flat head sheet metal or wood screws to attach FURTHER, then I recommend the hazelnut care holes (with a special countersink drill the pilot adjustable depth stop) for each screw to break each screw head. This allows you to hide screws with wood plugs glued tight fit in place for each recessed screw head, which can be cut (if necessary) and sanded flush with the surrounding surface. Using the case of low or zero VOC adhesive ¹ cover most of the areas largest area within its walls, with 1-inch to 1-1/2-inch (38 mm) thick (flat) flexible open cell acoustic foam. If desired, you can cover (acoustic foam) all other things remaining exposed surfaces within a 1-1/2-inch thick layer about 2 inches (38mm to 50mm) polyester fiber batting. ¹ (If all else fails, in a pinch you can use commonly available 3M Super 77 Spray Adhesive FoamFast or 74 as an alternative.) One final note: I do not recommend you cross the 12-inch Eminence Kappa 12 driver in the RCF Compression Driver N850 above 1 kHz, and if you're using a good quality, high performance (active) crossing, preferably not greater than 800 Hz In fact, the Eminence Kappa 12 drivers fall a little less than a low frequency driver and you should not expect high performance of these units especially with regard to the low output frequency below 80 Hz or less. ############ ############ RESOURCES Eminence Kappa 12 http://www.thielesmall.com/ include / details.asp? ID = 3297 & dtype = 1 Eminence Kappa-12A American Standard Series and parameters http://www.eminence.com/pdf/kappa-12a.pdf Resources http://www.eminence.com/resources/params.asp Eminence Designer Design speaker box Eminence Kappa 12 Eminence Program http://www.eminence.com/resources/designer.asp http://www.eminence.com/pdf/cab-kappa-12a.pdf Cabinet RCF N850 Audio 2 inch (throat out) audio compression driver http://www.rcfaudio.com/VediMacro.phtml/sLang/EN/IDMacro/1646/N850/ RCF HF64 40 ° x 60 ° constant directivity horn http://www.rcfaudio.com/vediMacro.phtml/sLang/EN/IDMacro/2732/menuAttivo/2293/m1/4/HornsHF64/product.htm ________________________ * Do you need help making my own speakers? Http: / / answers.yahoo.com / question / index? Qid = 20080409193652AAZKw3R Does anyone know the meathod to calculate the portability my low cabenet? [Http: / / answers.yahoo.com / question / index? Qid = 20080421141305AAdKp8f sic] What is the best box Sub Woofer speakers? Http: / / answers.yahoo.com / question / index? Qid = 20080227203259AADT9rS Speaker assemble? Http: / / answers.yahoo.com / question / index? Qid = 20070602144000AAsRqgw ________________________ http://www.audioxpress.com/bksprods/products/bkaa68.htm Speaker Design Free Online Calculators Cookbook http://www.madisound.com/services/hifispeakerdesign.php Speaker Steve Ekblad's Free Audio Software and On-Line Enclosure Design http://www.audiogrid.com/audio/ LinkList JPO SpeakerBuilding http://web.telia.com/ ~ u87124019/softwares.html HiFi Speaker Design © 2008 mhSoft http://www.mhsoft.nl/spk_calc.asp subwoofer vent port Box Equations Formulas Design Calculator Speaker ________________________ http://www.ajdesigner.com/phpsubwoofervented/box_volume_equation.php http://sound.westhost.com/articles/cscaling.htm scale Compliance JBL Professional http://www.jblpro.com/pub/manuals/enclgde.pdf Site Guide EAW Professional Audio Technical Paper has made http://www.eaw.com/info/EAW/Technical_Papers/HowItsMade. pdf How to fill a volume box set http://sound.westhost.com/articles/boxstuff.htm Reflex Speaker DIY - Part III: Get stuffed! Http: / / www.tnt-audio.com/clinica/speaker_design_pt3_getstuffed_e.html Building Speaker http://www.silcom.com/ aludwig ~ / Loudspeaker_construction.html DIY Speaker Builder - (speaker boxes) containing the article http://www.members.shaw.ca/LoudSpeakerBuilder.ca/enclosures. html good examples of shelf-style internal bracing ######## ######## ADDITIONAL RESOURCES http://www.hilberink.nl/codehans/tannoy116.htm Audio Engineering Sound Society First Route Basic Audio Laboratories 1992 Workshop http://www.drewdaniels.com/BINDER.pdf http://www.jblpro.com/pages/tech_lib.htm JBL Professional Technical Library JBL Professional Sound System Design Manual - 1999 Edition (Part 1) http://www.jblpro.com/pub/manuals/pssdm_1.pdf JBL Professional Sound System Design Manual - Issue 1999 (Part 2) http://www.jblpro.com/pub/manuals/pssdm_2.pdf Davis, Gary Ralph Jones Sound and Manual, 2nd Edition ISBN-13: 978-0881889000 ISBN-10: 0881889008 http:/ / www.yamaha.com/yamahavgn/CDA/ContentDetail/ModelSeriesDetail/0,,%% 25253D1630 CNTID 252526CTID 25253D230600% 00.html Eiche, Jon F. Guide to Sound Systems for Worship ISBN-13: 978-0793500291 ISBN-10: 079350029X http://www.yamaha.com/yamahavgn/CDA/ContentDetail/ModelSeriesDetail / 0,, CNTID% 25253D1631% 252526CTID 25253D230600% 00.html
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