 |
 Eminence Kappa Pro 10A 1000W 8 Ohm 10 Midrange SpeakerAUTHORIZED DEALER $128.81 Time Remaining: 10d 15h 12m Buy It Now for only: $128.81 |
 15 Eminence Kappa speaker woofer 8 ohms $65.00 Time Remaining: 4d 2h 9m |
 Eminence Kappa Pro 15A 15 Woofer 1000W Speaker 8 Ohms Authorized Dealer $157.98 Time Remaining: 20d 13h 7m Buy It Now for only: $157.98 |
 Eminence KAPPA 15LFA 15 Pro Midbass Speaker 8 Ohms $139.93 Time Remaining: 27d 9h 49m Buy It Now for only: $139.93 |
 New Eminence 15 Speaker Kappa Pro 15LF Clone $95.00 Time Remaining: 19d 12h 59m Buy It Now for only: $95.00 |
 Eminence KAPPA PRO 10A 10 8 Ohms Midbass Speaker $129.93 Time Remaining: 21d 22h 7m Buy It Now for only: $129.93 |
 New Eminence Kappa Pro 15LF 2 15 1200W Speaker 8 Ohms AUTHORIZED DEALER $169.94 Time Remaining: 17d 13h 26m Buy It Now for only: $169.94 |
 New Eminence Kappa Pro 12A 8 Ohms 12 Speaker Authorized DealerFull Warranty $127.45 Time Remaining: 14d 18h 39m Buy It Now for only: $127.45 |
 Eminence Kappa Pro 15A 15 500w Low Frequency Driver $128.00 Time Remaining: 2d 19h Buy It Now for only: $128.00 |
 EMINENCE KAPPA PRO 15 SPEAKER WORKS FINE FREE SHIPPING $100.00 Time Remaining: 3d 17h 39m Buy It Now for only: $100.00 |
 Eminence KAPPA15C 15 Midbass Speaker 4 Ohms $129.93 Time Remaining: 21d 12h 32m Buy It Now for only: $129.93 |
 Eminence Kappa Pro 10 A Speaker $129.99 Time Remaining: 11d 19h 13m Buy It Now for only: $129.99 |
 New Eminence Kappa 12A 12 Sub Woofer Speaker 900W 8 Ohm Authorized Dealer $98.01 Time Remaining: 3d 15h 40m Buy It Now for only: $98.01 |
 NEW Eminence Kappa Pro 12A 500 Watt 12 Speaker $149.95 Time Remaining: 27d 17h 33m Buy It Now for only: $149.95 |
 Eminence Kappa 12A Raw Woofer 12 KAPPA12A 1800W Peak $98.99 Time Remaining: 27d 18h 9m Buy It Now for only: $98.99 |
 New Eminence Kappa 15LFA 8 Ohms 15 600W Speaker Authorized DealerFull Warranty $139.90 Time Remaining: 15d 12h 35m Buy It Now for only: $139.90 |
 Eminence Kappa Pro 15A 15 500w Low Frequency Driver PA Replacement Speaker NEW $159.95 Time Remaining: 16d 17h 7m Buy It Now for only: $159.95 |
 New Eminence Kappa 15A 15 900 W Woofer 8 Ohms Sub Woofer Speaker DEALER $122.98 Time Remaining: 13d 12h 51m Buy It Now for only: $122.98 |
 Recone Kit for Eminence Kappa Pro 12A $75.00 Time Remaining: 27d 17h 45m Buy It Now for only: $75.00 |
 Eminence Eminence Kappa 15C 15 Low Frequency Driver $124.00 Time Remaining: 7d 20h 22m Buy It Now for only: $124.00 |
 Eminence Kappa 15A Raw Woofer 15 KAPPA15A 1800W Peak $122.99 Time Remaining: 27d 18h 11m Buy It Now for only: $122.99 |
 Eminence KAPPA 15A 15 Midbass Speaker 8 Ohms $129.93 Time Remaining: 21d 12h 32m Buy It Now for only: $129.93 |
 Eminence Kappa 12A 12 450 Watts Guitar Driver 8Ohm $99.49 Time Remaining: 12d 18h 5m Buy It Now for only: $99.49 |
 Eminence Kappa Pro 12A 500W Pro Audio Woofer 12 inch $149.99 Time Remaining: 29d 1h 31m Buy It Now for only: $149.99 |
 NEW Eminence Kappa Pro 15LF 2 600 Watt 15 Speaker $169.95 Time Remaining: 13d 16h 29m Buy It Now for only: $169.95 |
 18 Eminence Kappa speaker woofer 8 ohms $80.00 Time Remaining: 4d 2h 8m |
 Eminence KAPPA12A 12 900 Watt Max 8 Ohms Speaker $107.99 Time Remaining: 13d 2h 10m Buy It Now for only: $107.99 |
 Eminence Kappa Pro 15 LF 2 Speaker $169.99 Time Remaining: 11d 19h 22m Buy It Now for only: $169.99 |
 Eminence KAPPA PRO 10A 10 Mid Bass Speaker 500W 8 Ohm XCaseProAudio $128.78 Time Remaining: 16d 23h 47m Buy It Now for only: $128.78 |
 Eminence Kappa Pro 15A 15 Woofer FREE SHIPPING $159.99 Time Remaining: 2d 13h 25m Buy It Now for only: $159.99 |
 SONIC MR 212 WITH 2 EMINENCE KAPPA DRIVERS DISPLAY MODEL $589.99 Time Remaining: 17d 11h 30m Buy It Now for only: $589.99 |
 Eminence Kappa Pro 15LF 15 Woofer FREE SHIPPING $169.99 Time Remaining: 2d 13h 33m Buy It Now for only: $169.99 |
 Eminence Kappa PRO 12A 12 Woofer FREE SHIPPING $149.99 Time Remaining: 20d 16h 25m Buy It Now for only: $149.99 |
 Eminence Kappa Pro 12A 12 500w Cast Frame Driver 8 Ohm $127.90 Time Remaining: 12d 18h 8m Buy It Now for only: $127.90 |
 Eminence Kappa Pro 15A 500W Pro Audio Woofer 15 inch $159.99 Time Remaining: 29d 1h 30m Buy It Now for only: $159.99 |
 Eminence Kappa 15LF 2 15 Low Frequency Driver 8 Ohm $169.00 Time Remaining: 12d 10h 50m Buy It Now for only: $169.00 |
 Eminence Kappa Pro 15A 15in Raw Woofer KAPPAPRO 15 A $128.79 Time Remaining: 25d 13h 17m Buy It Now for only: $128.79 |
 Eminence Kappa Pro 12A 12in Raw Woofer KAPPAPRO 12 A $127.49 Time Remaining: 27d 17h 58m Buy It Now for only: $127.49 |
 Eminence KAPPA 15LFA 15 Woofer Speaker 600 Watt 8 Ohm $139.99 Time Remaining: 24d 18h 47m Buy It Now for only: $139.99 |
 Eminence Kappa Pro 15A 12in Raw Woofer KAPPAPRO 15 A $159.00 Time Remaining: 27d 18h 3m Buy It Now for only: $159.00 |
 Eminence Kappa Pro 12A 500 Watt 12 Cast Frame Woofer $149.99 Time Remaining: 10d 16h 33m Buy It Now for only: $149.99 |
 Eminence Kappa 10 Speaker 8 Ohm 600 Watts $100.00 Time Remaining: 7d 23h 5m Buy It Now for only: $100.00 |
 Eminence Kappa 15A 15 American Standard Speaker $129.99 Time Remaining: 26d 12h Buy It Now for only: $129.99 |
 Eminence KAPPA 15A 15 Mid Bass Speaker 450 Watt 8 Ohm $129.99 Time Remaining: 24d 18h 47m Buy It Now for only: $129.99 |
 Eminence Kappa Pro 10A 500 Watt 10 Cast Frame Woofer $129.99 Time Remaining: 1d 1h 51m Buy It Now for only: $129.99 |
 Eminence Kappa Pro 15A 500W PA Replacement Speaker 15 Inches $159.99 Time Remaining: 25d 5h 43m Buy It Now for only: $159.99 |
 Eminence KAPPA 15C 15 Mid Bass Speaker 450 Watt 4 Ohm $129.99 Time Remaining: 24d 18h 47m Buy It Now for only: $129.99 |
 Eminence Kappa Pro 15LF2 600W Replacement PA Speaker 15 Inches $169.99 Time Remaining: 6d 11h 15m Buy It Now for only: $169.99 |
 Eminence Kappa Pro 15LF2 600W Replacement PA Speaker 15 Inches $169.99 Time Remaining: 12d 3h 35m Buy It Now for only: $169.99 |
 EMINENCE KAPPA 12 inch 12 450 WATT SPEAKER DRIVER IN GOOD CONDITION $11.39 (3 Bids) Time Remaining: 4d 17h 16m |
 Eminence KAPPA 12A 12 Mid Full Speaker 450 Watt 8 Ohm XCaseProAudio $97.99 Time Remaining: 16d 10h 15m Buy It Now for only: $97.99 |
 Eminence Kappa Pro 15A 500W PA Replacement Speaker 15 Inches $145.59 Time Remaining: 6d 23h 47m Buy It Now for only: $145.59 |
 Eminence Kappa Pro 15A 500W PA Replacement Speaker 8ohm $159.99 Time Remaining: 6d 17h 29m Buy It Now for only: $159.99 |
 Eminence KAPPA PRO 15A 15 Speaker 500 Watt 8 Ohm $159.99 Time Remaining: 24d 18h 47m Buy It Now for only: $159.99 |
 Eminence KAPPA PRO 15LF 2 15 Speaker 600 Watt 8 Ohm $169.99 Time Remaining: 24d 18h 47m Buy It Now for only: $169.99 |
 Eminence KAPPA PRO 12A 12 Mid Bass Speaker 500W 8 Ohm $149.99 Time Remaining: 24d 18h 47m Buy It Now for only: $149.99 |
 Eminence Kappa Pro 15LF2 600W Replacement PA Speaker $169.99 Time Remaining: 15d 18h 48m Buy It Now for only: $169.99 |
 Eminence Speaker 744KAPPA 12A WOOFER 12 500W 8OHM PA $119.99 Time Remaining: 12d 15h 28m Buy It Now for only: $119.99 |
 Eminence Speaker 744KAPPA PRO 15A WOOFER 15 500W 8OHM PA $191.99 Time Remaining: 12d 15h 41m Buy It Now for only: $191.99 |
 Eminence Kappa Pro 15A 500 Watt 15 Cast Frame Woofer $159.99 Time Remaining: 1d 19h 43m Buy It Now for only: $159.99 |
 Powerful Eminence Kappa Pro 15A 15 speaker Fresh recone Nice $89.00 Time Remaining: 19d 15h 53m Buy It Now for only: $89.00 |
 Eminence Kappa Pro 12A 12 Speakers Brand New Genuine Emience $119.99 Time Remaining: 4d 23h 52m Buy It Now for only: $119.99 |
 Eminence Kappa 12A 12 Speaker 8 Ohm Mid Full Range $99.99 Time Remaining: 29d 13h 54m Buy It Now for only: $99.99 |
 Eminence Kappa Pro 10A 10 Speakers Brand New Genuine Emience $109.99 Time Remaining: 4d 23h 49m Buy It Now for only: $109.99 |
 Eminence Kappa Pro 15A 15 Speakers Brand New Genuine Emience $124.99 Time Remaining: 4d 23h 55m Buy It Now for only: $124.99 |
 Eminence Kappa 15A 15 Speaker 8 Ohm Mid Bass Woofer $124.99 Time Remaining: 29d 14h 2m Buy It Now for only: $124.99 |
 Eminence Kappa Pro 12A 500 Watt 12 Mid Bass 8 Ohm New $149.99 Time Remaining: 7d 11h 39m Buy It Now for only: $149.99 |
 Eminence Kappa 15C 15 Speaker 4 Ohm Mid Bass Woofer $124.99 Time Remaining: 29d 14h 10m Buy It Now for only: $124.99 |
 Eminence Kappa Pro 15LFA2 15 Speakers Brand New Genuine Emience $134.99 Time Remaining: 5d 3m Buy It Now for only: $134.99 |
 Eminence Kappa Pro 15LF 2 600 Watt 15 Woofer Pro 15LF $169.99 Time Remaining: 19d 8h 45m Buy It Now for only: $169.99 |
 Eminence Kappa Pro 10A 500 Watt 10 Mid Bass 8 Ohm New $129.99 Time Remaining: 12d 12h 12m Buy It Now for only: $129.99 |
 Eminence Kappa Pro 15A 500 Watt 15 Woofer 8 Ohm New $159.99 Time Remaining: 16d 11h 9m Buy It Now for only: $159.99 |
 Eminence Kappa 15LFA 15 Speaker 8 Ohm 600 Watts NEW $139.99 Time Remaining: 29d 14h 29m Buy It Now for only: $139.99 |
Eminence Kappa
But They Did Not Give Up…
“Ever tried. Ever failed. No matter. Try Again. Fail again. Fail better.” ~ Samuel Beckett
As a young man, Abraham Lincoln went to war a captain and returned a private. Afterwards, he was a failure as a businessman. As a lawyer in Springfield, he was too impractical and temperamental to be a success.
He turned to politics and was defeated in his first try for the legislature, again defeated in his first attempt to be nominated for congress, defeated in his application to be commissioner of the General Land Office, defeated in the senatorial election of 1854, defeated in his efforts for the vice-presidency in 1856, and defeated in the senatorial election of 1858.
At about that time, he wrote in a letter to a friend, “I am now the most miserable man living. If what I feel were equally distributed to the whole human family, there would not be one cheerful face on the earth.”
Winston Churchill failed sixth grade. He was subsequently defeated in every election for public office until he became Prime Minister at the age of 62. He later wrote, “Never give in, never give in, never, never, never, never – in nothing, great or small, large or petty – never give in except to convictions of honor and good sense. Never, Never, Never, Never give up.” (his capitals, mind you)
Socrates was called “an immoral corrupter of youth” and continued to corrupt even after a sentence of death was imposed on him. He drank the hemlock and died corrupting.
Sigmund Freud was booed from the podium when he first presented his ideas to the scientific community of Europe. He returned to his office and kept on writing.
Robert Sternberg received a C in his first college introductory-psychology class. His teacher commented that “there was a famous Sternberg in psychology and it was obvious there would not be another.” Three years later Sternberg graduated with honors from Stanford University with exceptional distinction in psychology, summa cum laude, and Phi Beta Kappa. In 2002, he became President of the American Psychological Association.
Charles Darwin gave up a medical career and was told by his father, “You care for nothing but shooting, dogs and rat catching.” In his autobiography, Darwin wrote, “I was considered by all my masters and my father, a very ordinary boy, rather below the common standard of intellect.” Clearly, he evolved.
Thomas Edison’s teachers said he was “too stupid to learn anything.” He was fired from his first two jobs for being “non-productive.” As an inventor, Edison made 1,000 unsuccessful attempts at inventing the light bulb. When a reporter asked, “How did it feel to fail 1,000 times?” Edison replied, “I didn’t fail 1,000 times. The light bulb was an invention with 1,000 steps.”
About the Author
Azerbaijani Journalist in France
when building speakers how do you calculate volume?
I am planning on building a speaker cabinate will two Eminence Kappa 12a speakers and one RCF 850 titanium driver. The speaks for the Eminence speaker call for a volume of 112 liters. Since I have two speakers does the volume need to double? Do Drivers also require a specific amount of volume. I can;t find a spec volume amount for the driver.
I have provided links to all of the driver datasheets you need to begin the loudspeaker enclosure design and construction process. (Note: when feasible it is ALWAYS much better to design loudspeaker enclosures using Thiele-Small parameters obtained from first-hand measurements, after a rigorous driver break-in period, rather than relying upon those provided by the driver manufacturer.)
Using high EBP drivers such as the Eminence Kappa 12 you will obtain the best results by constructing a “vented box” enclosure designed for a maximally-flat Butterworth—or near maximally-flat—fourth-order alignment (assuming an enclosure Q, i.e., Q.sub.L, equal to 7.) You can derive the necessary loudspeaker enclosure design parameters using: (a) tables from one of the popular loudspeaker design publications, such as the highly-recommended Loudspeaker Design Cookbook by Vance Dickason; (b) one of the online loudspeaker enclosure calculators; or (c) purchase and/or download loudspeaker design software. In addition to obtaining a copy of the Loudspeaker Design Cookbook, I highly recommend that you download one of the free loudspeaker design programs (such as WinISD Pro) to which I’ve provided links* in the resources listed below. You may also try using the Eminence Designer Loudspeaker Enclosure Design Program though you may get better results using one of the other software applications. Using procedures (b) or (c) simply plug in the Thiele-Small parameters obtained from the manufacturer’s spec sheet (or better yet from your own measurements) into the enclosure design calculator or software as necessary.
I recommend that you allow multiple Eminence Kappa 12 drivers to share a single internal enclosure volume. If you’re using tables then multiply the calculated internal enclosure volume (V.sub.B) for a single Kappa 12 driver by the total number of Kappa 12 drivers sharing the same enclosure volume, i.e., the enclosure volume for two Eminence Kappa 12 drivers will be double that of a single driver. (Note: 112.1 liters is NOT the recommended internal enclosure volume for a single Kappa 12 driver however it is used to calculate the proper internal enclosure volume.)
Depending on how much internal bracing and sound absorption you use you should increase the total calculated internal enclosure volume (V.sub.B) by approximately five to ten percent (5-10%) in order to compensate for any reduction in volume due to internal bracing and components as well as an added margin of design safety. It’s important to note that when starting with an over-sized enclosure it is much easier to optimize the internal volume of the ‘box’ (V.sub.B) by gluing carefully fabricated blocks of MDF, plywood, or rigid closed-cell foam material inside the enclosure in order to (incrementally) reduce the internal volume. Consequently this allows you to fine tune the enclosure resonant frequency whereas an undersized enclosure would make fine tuning extremely difficult. However if you build a prototype from MDF as I have suggested below then you can neglect over-sizing the internal box volume for the final plywood loudspeaker enclosures.
The following are a few more loudspeaker design and construction notes for your consideration.
If you’re assembling loudspeakers for (portable) pro sound use I highly recommend using the industry standard 3/4-inch (19mm) or 18mm high-grade, void-free, 13-ply, marine or Baltic birch plywood to construct your loudspeaker enclosures. If need be you can prototype a single loudspeaker using medium density fiberboard (MDF) before proceeding to the more expensive plywood material. Do not skimp on internal bracing, which should be fabricated from no less than 1/2-inch (13mm) Baltic birch or marine plywood. Braces are not intended to be partitions and therefore should contain ample cut-outs to allow air movement; dado and glue all bracing in place. You should have at least one wall-to-wall brace between each driver in your enclosure. (Please see the resources listed below for a link to an example of internal, wall-to-wall bracing.)
When choosing vents I recommend using individual vents no smaller than 4 inches in diameter with flares at both ends of the vent duct. (Please see the resources below for more info.)
IF you intended to use flat-head sheet metal or woodscrews, IN ADDITION to glue, then I recommend carefully countersinking the holes (using a special countersink bit with adjustable pilot and depth stop) for each screw in order to recess each screw head. This allows you to hide the screws using tight-fitting wood plugs glued in place over each recessed screw head, which can be cut (if necessary) and sanded flush with the surrounding surface.
Using the appropriate low- or zero-VOC adhesive¹ cover the majority of the largest surface areas inside your enclosure with 1-inch to 1-1/2-inch (38mm) thick (flat) flexible, open-cell acoustical foam. If you wish you can cover (the acoustical foam and) all other remaining exposed interior surfaces with a roughly 1-1/2-inch to 2-inch (38mm to 50mm) thick layer of polyester fiber batting. ¹(If all else fails, in a pinch you can use 3M’s commonly available Super 77 or FoamFast 74 Spray Adhesive as an alternative.)
One final note: I do not recommend that you crossover the 12-inch Eminence Kappa 12 driver to the RCF N850 compression driver any higher than 1 kHz; and if you will be using a good quality, high performance (active) crossover, preferably no higher 800 Hz.
By the way, the Eminence Kappa 12 drivers fall a little short for a low-frequency driver and you shouldn’t expect high performance from such units particularly with respect to low-frequency output below roughly 80 Hz.
############ RESOURCES ############
Eminence Kappa 12
http://www.thielesmall.com/include/details.asp?ID=3297&dtype=1
Eminence Kappa-12A American Standard Series
http://www.eminence.com/pdf/kappa-12a.pdf
Eminence Resources and Parameters
http://www.eminence.com/resources/params.asp
Eminence Designer Loudspeaker Enclosure Design Program
http://www.eminence.com/resources/designer.asp
Eminence Kappa 12 Cabinet
http://www.eminence.com/pdf/cab-kappa-12a.pdf
RCF Audio N850 2-inch (exit throat) Compression Driver
http://www.rcfaudio.com/VediMacro.phtml/sLang/EN/IDMacro/1646/N850/
RCF Audio HF64 60°×40° Constant Directivity Horn
http://www.rcfaudio.com/vediMacro.phtml/sLang/EN/IDMacro/2732/menuAttivo/2293/m1/4/HornsHF64/product.htm
________________________
*Need help making my own speakers?
http://answers.yahoo.com/question/index?qid=20080409193652AAZKw3R
Does anybody know the meathod to work out the porting for my bass cabenet? [sic]
http://answers.yahoo.com/question/index?qid=20080421141305AAdKp8f
What is the best enclosure for sub woofer speakers?
http://answers.yahoo.com/question/index?qid=20080227203259AADT9rS
Speaker assemble?
http://answers.yahoo.com/question/index?qid=20070602144000AAsRqgw
________________________
Loudspeaker Design Cookbook
http://www.audioxpress.com/bksprods/products/bkaa68.htm
Free Online Loudspeaker Calculators
http://www.madisound.com/services/hifispeakerdesign.php
Steve Ekblad’s Free Audio Software and On-Line Enclosure Design
http://www.audiogrid.com/audio/
JPO’s SpeakerBuilding LinkList
http://web.telia.com/~u87124019/softwares.html
HiFi Speaker Design © mhSoft 2008
http://www.mhsoft.nl/spk_calc.asp
Vented Ported Subwoofer Box Equations Formulas Design Calculator
http://www.ajdesigner.com/phpsubwoofervented/box_volume_equation.php
________________________
Loudspeaker Compliance Scaling
http://sound.westhost.com/articles/cscaling.htm
JBL Professional Enclosure Guide
http://www.jblpro.com/pub/manuals/enclgde.pdf
EAW Professional Audio Technical Paper: How It’s Made
http://www.eaw.com/info/EAW/Technical_Papers/HowItsMade.pdf
Volume Filling a Reflex Box
http://sound.westhost.com/articles/boxstuff.htm
DIY loudspeakers series - Part III: Get Stuffed!
http://www.tnt-audio.com/clinica/speaker_design_pt3_getstuffed_e.html
Loudspeaker Construction
http://www.silcom.com/~aludwig/Loudspeaker_construction.html
Loudspeaker Builder DIY - (Speaker Enclosures)
http://www.members.shaw.ca/LoudSpeakerBuilder.ca/enclosures.html
Article containing good examples of shelf-style internal bracing
http://www.hilberink.nl/codehans/tannoy116.htm
######## ADDITIONAL RESOURCES ########
Audio Engineering Society Sound Path Labs
First Basic Audio Workshop 1992
http://www.drewdaniels.com/BINDER.pdf
JBL Professional Technical Library
http://www.jblpro.com/pages/tech_lib.htm
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 - 1999 Edition (Part 2)
http://www.jblpro.com/pub/manuals/pssdm_2.pdf
Davis, Gary and Ralph Jones
Sound Reinforcement Handbook, 2nd Edition
ISBN-13: 978-0881889000
ISBN-10: 0881889008
http://www.yamaha.com/yamahavgn/CDA/ContentDetail/ModelSeriesDetail/0,,CNTID%25253D1630%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
2 Eminence Kappa 15Cs - Flex from the mids