The design addresses the stiffness issue by using two lightweight mineral-filled polypropylene skins, bonded together at the perimeter and the center of the assembly. Detailed Information:The more excursion and motor force a speaker has, the more important cone rigidity becomes. Note: Products purchased from unauthorized dealers are not covered under warranty.Warranty LimitationsThe following is not covered under JL Audio's warranty program:1. Paired this with an HD1200 and whoa!! Warranty Information - Mobile Audio Subwoofers\u003c\/h3\u003e\n\u003cp\u003e\u003cbr\u003eJL Audio Subwoofers are warrantied against defects in materials and workmanship for \u003cstrong\u003eOne (1) Year from purchase date.\u003c\/strong\u003e JL Audio will, at its discretion, repair or replace any products that exhibit defects in materials and\/or workmanship during the warranty period.\u003cbr\u003e\u003cbr\u003ePlease hold on to your sales receipt! 10th Anniversary Edition - W7 8-inch Subwoofer (500 W, 3 Ω) This Subwoofer has been called the "best damn 8-inch subwoofer ever made" for its remarkable performance capabilities and design attributes. Wedge™ \u0026amp; MicroSub™ Enclosed Subwoofers\u003c\/li\u003e\n\u003cli\u003eMarine Loudspeakers, Marine Subwoofers and Marine Enclosed Loudspeakers\u003c\/li\u003e\n\u003cli\u003eHome Subwoofers: Dominion™, E-Sub, Fathom® and Gotham® \u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- split: SUPPORT :--\u003e\u003cb\u003eDownload \u003ca href=\"https:\/\/embed.widencdn.net\/pdf\/plus\/jlaudio\/jkzqppvu93\/W7AE_MAN.pdf?u=ndijqi\" style=\"color: #707073; padding-right: 24px; background: url('https:\/\/cdn.shopify.com\/s\/files\/1\/0231\/7202\/2350\/files\/icon_pdf.gif?932') no-repeat right center;\"\u003e12W7AE-3 Product Manual\u003c\/a\u003e\u003cbr\u003e\u003c\/b\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eFind the answers to many common questions:\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/jlaudio.zendesk.com\/hc\/en-us\"\u003e\u003cimg src=\"https:\/\/embed.widencdn.net\/img\/jlaudio\/wlnc60olsy\/exact\/JLA-Help-Center-logo.png\"\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e*********************************\u003cbr\u003e\u003c\/p\u003e\n\u003ch3\u003eU.S.A. For a limited time - while supplies last - get an instant 10% off the JL Audio SGR-12W7, 3 Aluminum Bar Grille Kit. That being said, there is a big difference between piston area and excursion: piston area doesn't need power to make it happen. (JL Audio will not be responsible for restoring or maintaining any custom finishes)9. Simply click the "Add Both to Cart" button. Wedge™ \u0026amp; MicroSub™ Enclosed Subwoofers\u003c\/li\u003e\n\u003cli\u003eMarine Loudspeakers, Marine Subwoofers and Marine Enclosed Loudspeakers\u003c\/li\u003e\n\u003cli\u003eHome Subwoofers: Dominion™, E-Sub, Fathom® and Gotham® \u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- split: SUPPORT :--\u003e\u003cb\u003eDownload \u003ca href=\"https:\/\/embed.widencdn.net\/pdf\/plus\/jlaudio\/jkzqppvu93\/W7AE_MAN.pdf?u=ndijqi\" style=\"color: #707073; padding-right: 24px; background: url('https:\/\/cdn.shopify.com\/s\/files\/1\/0231\/7202\/2350\/files\/icon_pdf.gif?932') no-repeat right center;\"\u003e12W7AE-3 Product Manual\u003c\/a\u003e\u003cbr\u003e\u003c\/b\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eFind the answers to many common questions:\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/jlaudio.zendesk.com\/hc\/en-us\"\u003e\u003cimg src=\"https:\/\/embed.widencdn.net\/img\/jlaudio\/wlnc60olsy\/exact\/JLA-Help-Center-logo.png\"\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e*********************************\u003cbr\u003e\u003c\/p\u003e\n\u003ch3\u003eU.S.A. This gives us a highly accurate model of a speaker's actual behavior under real power, something that the traditional Thiele-Small models or other low power measurements cannot do. All warranty service requires original sales receipt documentation. All warranty service requires original sales receipt documentation. Our two-skin unit-body cone design achieves outstanding axial and torsional stiffness to withstand all kinds of abuse, and will remain largely unaffected and unblemished.\u003c\/p\u003e\n\u003cimg src=\"https:\/\/embed.widencdn.net\/svg\/jlaudio\/knnglas3xo\/JLA-ElevatedFrame-logo.svg?u=fhkrg%20alt=\" elevated=\"\" frame=\"\" cooling=\"\" width=\"200\"\u003e\n\u003ch3\u003eElevated Frame Cooling (U.S. Patent #6,219,431 \u0026amp; #6,229,902)\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eSummary:\u003c\/strong\u003e\u003cbr\u003eJL Audio's patented Elevated Frame Cooling design delivers cool air through slots directly above the top-plate to the voice coil of the speaker. DMA not only shows that this "fixed" field changes in reaction to the magnetic field created by current flowing through the voice coil, but it helps our engineers arrive at motor solutions that minimize this instability. The result is flawless high-excursion lead-wire behavior, with outstanding reliability and none of the compromises inherent to a woven-in lead wire system. This means that the prodigious excursion advantage of the W7 can be put to full use enhancing output, rather than making up for lost piston area.\u003c\/p\u003e\n\u003cp\u003eThe technology also provides a geometry advantage on the outside edge of the surround roll, allowing for more linear operation. The effect is not unlike the trusses of a bridge or the unit-body construction of a modern automobile. This leads to efficiency penalties and suspension complications (it's harder to keep a heavy mass aligned properly). The SPL is intense while it still maintains incredible SQ. Atrend JL Audio 12W7 Subwoofer Box (12W7SV), Bundle Savings of $139 99. As stated above, our patented W-Cone technology achieves all of the benefits of more exotic materials while better suiting the unique nature of the W7. Analyzing this behavior is critical to understanding the distortion mechanisms of a speaker motor and sheds light on the aspects of motor design that determine truly linear behavior: Our ability to fully analyze these aspects of motor behavior allows our transducer engineers to make critical adjustments to motor designs that result in extremely linear, highly stable dynamic loudspeaker motor systems. This, combined with our commitment to state-of-the-art assembly technology, allows our skilled workforce to efficiently build JL Audio products to extremely high quality standards, right here in the U.S.A. (The warranty is not transferable and will not apply to products purchased from unauthorized dealers.)\u003cbr\u003e3. This is why, the PDF books that we presented always the books like incredible reasons. This means that by making a larger piston, you are directly improving displacement for a given amount of excursion and, therefore, making your speaker more efficient. \u003cbr\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e Products purchased from unauthorized dealers are not covered under warranty.\u003cbr\u003e\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eWarranty Limitations\u003c\/strong\u003e\u003cbr\u003e\u003cbr\u003eThe following is not covered under JL Audio's warranty program:\u003cbr\u003e1. DMA is JL Audio's proprietary Dynamic Motor Analysis system and is aimed at improving dynamic motor behavior. Warranty expiration on products returned without proof of purchase will be determined from the manufacturing date code. A minimum distance of 0.75 in (19 mm) is required between the back of the speaker and any wall of the enclosure to allow proper operation of the pole vent. The mounting flange is simply hidden beneath the surround and is made accessible for mounting purposes by detaching the outer edge of the surround and moving the roll to the inside (a pretty neat little trick). The lower skin's cross-section is shaped like a 'W', hence the name, and provides incredible rigidity when bonded to the dished upper skin. All trademarks and trade names are the property of their respective trademark holders. Highly recommend. for great deals on the sound system (JL Audio12w7ae & amps, etc..) I'd ordered. * The W7’s employ a pole vent to remove heat and pressure from the inside of the speaker.This vent is located at the rear of the speaker. JL Audio 12W7AE Anniversary Edition 12" Subwoofer: Amazon.co.uk: Electronics ... JL Audio 12W7-3 The W7 embodies JL Audioäó»s commitment to pushing the envelope of speaker technology, with six patented technologies and a completely unique set of component parts. So why polypropylene? These drivers have set the bar for drivers wanting to provide the deep transparent lows of a Sound Quality woofer and the hard hitting power of an SPL sub. Product that has not been installed according to the instructions in the owner's manual5. With an enclosure, the sizes range from 12 to 20 inches wide and long by 6 to 10 inches deep. A major component of this integrated system is DMA (Dynamic Motor Analysis). This ultimately led to the design we call the W-Cone. A further benefit of the W-Cone is that the upper skin (the one in contact with the listening environment), is isolated from the high air-pressure gradients of the enclosure, further reducing deformation (and distortion).\u003c\/p\u003e\n\u003cp\u003eAs a point of comparison, the W-Cone assembly of a 12W7 is 32% lighter than a typical aluminum-alloy 12-inch cone. This is the best subwoofer on the market. Product owned by anyone other than the original purchaser from an authorized JL Audio dealer. These are great OVERALL subs, if you want big sloppy sounding SPL go buy Kickers,Sundown,DC audio,earthquake ect. $749.99. For example, a typical 12-inch woofer with a medium-sized roll has an effective piston area of 81.52 square inches. Customer is responsible for shipping charges and insurance in sending the product to JL AUDIO. This vent is located at the rear of the speaker. For this reason, speakers with longer excursion capability generally need larger surround rolls (we won't comment on the ones that use large rolls strictly for cosmetic effect). Managing the 'whipping' behavior of the wire and making sure it does not contact the cone or spider is one challenge. It's the quality. Although the 12W7AE-3 Subwoofer can be driven with as little as 400 Watts, for best audio performance it is recommended to run an amplifier capable of between 750 - 1000 Watts of continuous power per driver, like the JL Audio HD750/1 or JL Audio XD1000/1v2. Let me know if you're interested. Each of the four models is a completely original design from surround to back-plate (even the bolts and screws used in assembly have been purpose-designed and manufactured to our specifications). A major component of this integrated system is DMA (Dynamic Motor Analysis). Get true gauge JL Audio speaker wire to match your JL Audio subwoofer! Because the user can tug on the cone while manipulating the surround, the cone must be able to handle this without buckling or deforming. Auto e Moto - Parti e Accessori. Prime Carrello. This means that by making a larger piston, you are directly improving displacement for a given amount of excursion and, therefore, making your speaker more efficient. Building woofers this way requires much more labor and parts complexity than the simpler woven-in approach, but the payoff is in reduced distortion, reduced mechanical noise and improved reliability. – Tom Nousaine, Mobile Entertainment (USA), April/May 2002, "You'll be amazed at the sound produced — it's smooth, deep and musical but can also be played to hurt… You've simply got to hear the new W7…", "You'll need to buy two or even three subs of a similar size to make the same (output) and you probably won't have room for them." This will reduce the likelihood of occupant injury in the event of a collision or sudden deceleration.\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c!-- accordion: Ported Enclosure Specifications --\u003e\n\u003cdiv\u003e\u003cimg src=\"https:\/\/embed.widencdn.net\/svg\/jlaudio\/bapkzxwmpr\/Slot_Ported_ENC_Dimensions.svg?u=ndijqi\" alt=\"Lineart diagram of empty slot ported enclosure with physical specification labels\"\u003e\u003c\/div\u003e\n\u003ctable border=\"1\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 50%;\"\u003eWall Thickness\u003c\/td\u003e\n\u003ctd style=\"width: 50%;\"\u003e0.75 in \/ 19 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 50%;\"\u003eFront Baffle Thickness\u003c\/td\u003e\n\u003ctd style=\"width: 50%;\"\u003e1.0 in \/ 25 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 50%;\"\u003eVolume (net int. Direct returns from consumers or non-authorized dealers will be refused unless specifically authorized by JL AUDIO with a valid return authorization number. )\u003c\/td\u003e\n\u003ctd style=\"width: 50%;\"\u003e1.75 cu ft \/ 49.6 L\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 50%;\"\u003eExternal Width (W)\u003c\/td\u003e\n\u003ctd style=\"width: 50%;\"\u003e22.75 in \/ 578 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 50%;\"\u003eExternal Height (H)\u003c\/td\u003e\n\u003ctd style=\"width: 50%;\"\u003e15 in \/ 381 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 50%;\"\u003eExternal Depth (D)\u003c\/td\u003e\n\u003ctd style=\"width: 50%;\"\u003e15.875 in \/ 403 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 50%;\"\u003eInternal Slot Port Width (SW)\u003c\/td\u003e\n\u003ctd style=\"width: 50%;\"\u003e1.875 in \/ 48 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 50%;\"\u003eInternal Slot Port Height (SH)\u003c\/td\u003e\n\u003ctd style=\"width: 50%;\"\u003e13.5 in \/ 343 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 50%;\"\u003eInternal Slot Port Length (SL)\u003c\/td\u003e\n\u003ctd style=\"width: 50%;\"\u003e24.75 in \/ 629 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 50%;\"\u003ePort Extension Length (EL)\u003c\/td\u003e\n\u003ctd style=\"width: 50%;\"\u003e7.9375 in \/ 202 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 50%;\"\u003eTuning Frequency (Fb)\u003c\/td\u003e\n\u003ctd style=\"width: 50%;\"\u003e36.7 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 50%;\"\u003eF3\u003c\/td\u003e\n\u003ctd style=\"width: 50%;\"\u003e32.8 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e\u003cstrong\u003eEnclosure Notes\u003c\/strong\u003e\u003cbr\u003eNet volumes given above do not include the air volume displaced by the speaker (Driver Displacement). These modeling routines are intense, requiring hours to run for a whole speaker. The technology also provides a geometry advantage on the outside edge of the surround roll, allowing for more linear operation. Some models also feature jacketed lead-wires to further reduce the likelihood of shorting and fatigue. Iscriviti a. Installation and shipping costs associated with removing, re-installing or shipping the product to JL Audio for warranty serviceAsk your dealer for details on warranty limitations.If you need Service on your JL Audio Product:All warranty returns should be sent to JL AUDIO freight prepaid through an authorized JL AUDIO dealer and must be accompanied by proof of purchase (a copy of the original sales receipt.) Because the user can tug on the cone while manipulating the surround, the cone must be able to handle this without buckling or deforming. Product in which repair and\/or modification has been attempted by unauthorized parties\u003cbr\u003e6. Building woofers this way requires much more labor and parts complexity than the simpler woven-in approach, but the payoff is in reduced distortion, reduced mechanical noise and improved reliability.\u003c\/p\u003e\n\u003cimg src=\"https:\/\/embed.widencdn.net\/svg\/jlaudio\/fn0gmjcegm\/JLA-BuiltinUSA-Logo-C.svg?u=fhkrg%20alt=\" built=\"\" in=\"\" u=\"\" s=\"\" a=\"\" with=\"\" global=\"\" components=\"\" width=\"200\"\u003e\n\u003ch3\u003eBuilt in U.S.A. with Global Components\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eSummary:\u003c\/strong\u003e\u003cbr\u003eJL Audio's Miramar, Florida loudspeaker production facility is one of the most advanced in the world.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDetailed Information:\u003c\/strong\u003e\u003cbr\u003eAt a time when most audio products are built overseas, JL Audio’s commitment to in-house loudspeaker production continues to grow. Without exaggeration, one can call the W7 one of the best woofers of all times." By elevating the frame above the top-plate of the motor (via stand-offs integrated into the bottom of the frame) a narrow, high-velocity air-path is created between the bottom surface of the frame and the top surface of the top-plate. Now, the Anniversary Edition W7 Series 12W7AE-3 12" subwoofer features the latest refinements to this groundbreaking design, highlighted by a satin-black frame, silvery anodized trim ring, and special anniversary logo. Because the user can tug on the cone while manipulating the surround, the cone must be able to handle this without buckling or deforming. Sub is awesome. I dynamited my truck with the NVX sound dampener and it worked awesome! This value must be added to the net volume along with the displacement of any braces and\/or ports (if applicable) to arrive at a gross internal volume. for an aluminum-alloy cone and 1.66g/sq.in. ft. (49.6 l) ported enclosure. Hard shell case included. So, you can way in jl audio 12w7 anniversary edition easily from some device to maximize the technology usage. This leads to efficiency penalties and suspension complications (it's harder to keep a heavy mass aligned properly).\u003c\/p\u003e\n\u003cp\u003eA simple poly cone diaphragm, while sufficient for lower power designs, would not remain rigid under the demands that the W7 design requires. This feature helps ensure concentricity of the surround, spider and voice coil without torquing the suspension to achieve it. W7AE 10th Anniversary Edition Subwoofer Driver. The W7AE embodies JL Audio's commitment to pushing the envelope of speaker technology. Product with defaced, altered or removed serial numbers (no valid, legible serial number = no warranty).2. This means that the prodigious excursion advantage of the W7 can be put to full use enhancing output, rather than making up for lost piston area. Warranty expiration on products returned without proof of purchase will be determined from the manufacturing date code. Detailed Information:At a time when most audio products are built overseas, JL Audio’s commitment to in-house loudspeaker production continues to grow. The W-Cone assembly achieves its rigidity through architectural means, rather than through inherently stiff materials. Trustworthy! W7AE 10th Anniversary Edition Subwoofer Driver. This means that we can use a large roll for all its benefits without sacrificing cone area (in fact, the 12W7 has 1% more piston area than the medium-surround conventional woofer). Similar Items - JL W7 12 anniversary edition - $350 (Ignacio) Fender Stratocaster 60th Anniversary Edition - $350 (Jackson, MI) Fender Strat (Made In Mexico)Relic'd Out, Looks Old, N-3 Noiseless Pickups, Rolled Edged Neck, Plays great, 9-42s Strings. This vent is located at the rear of the speaker. In addition, these subwoofers are optimized to operate in either a ported or sealed enclosures, needing 1.375 cubic feet of air space in a sealed box and 1.75 cubic feet in a ported/vented enclosure. It still wants more power! By elevating the frame above the top-plate of the motor (via stand-offs integrated into the bottom of the frame) a narrow, high-velocity air-path is created between the bottom surface of the frame and the top surface of the top-plate. or metals (aluminum, magnesium, titanium alloys). This ultimately led to the design we call the W-Cone. This feature helps ensure concentricity of the surround, spider and voice coil without torquing the suspension to achieve it. This is essentially the speaker's \"cylinder bore\", to use an automotive engine analogy, and is calculated by measuring the diameter of the diaphragm including one-half of the surround roll-width. Product in which repair and\/or modification has been attempted by unauthorized parties\u003cbr\u003e6. This will reduce the likelihood of occupant injury in the event of a collision or sudden deceleration.\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c!-- split: TECHNOLOGY :--\u003e\u003cimg src=\"https:\/\/embed.widencdn.net\/svg\/jlaudio\/xtrj6rifmb\/JLA-DMA-logo.svg?u=fhkrg%20alt=\" dma=\"\" optimized=\"\" width=\"200\"\u003e\n\u003ch3\u003eDynamic Motor Analysis - DMA Optimized Motor\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eSummary:\u003c\/strong\u003e\u003cbr\u003eJL Audio's proprietary Dynamic Motor Analysis system is a powerful suite of FEA-based modeling systems, first developed by JL Audio in 1997 and refined over the years to scientifically address the issue of speaker motor linearity. The lower skin's cross-section is shaped like a 'W', hence the name, and provides incredible rigidity when bonded to the dished upper skin. In addition to the overall rigidity benefit, the lower skin's shape distributes the force generated by the coil and motor more evenly than a typical diaphragm. Blew within a year.....and the place I bought it from gon have to send it back to Florida to get it fixed and charge $335 but remember this sub is $1000 the speaker and it will take 3weeks....it’s better woofers out there that will last longer!!!! Product that has not been installed according to the instructions in the owner's manual\u003cbr\u003e5. I thought I was impressed with the JL 12W6 until it crapped out (due to the eq curve that I didn't know about because it was purchased used.) If the surround's roll-width is not adequately large, its behavior (compliance) is not linear over the useful stroke of the woofer and it is more likely to fatigue and fail. 3.9 out of 5 stars 3. Select your vehicle year, make, model and (other attributes as requested). JL Audio Announces W7 Anniversary Edition Subwoofers Miramar, FL—February 15, 2011— Ten years ago, JL Audio made headlines and moved the boundaries of subwoofer design with the introduction of the W7—a revolutionary subwoofer, meticulously engineered to deliver immense output with an extremely high level of fidelity. This value must be added to the net volume along with the displacement of any braces and\/or ports (if applicable) to arrive at a gross internal volume. Very pleased overall. This thing is a beast! This is essentially the speaker's \"cylinder bore\", to use an automotive engine analogy, and is calculated by measuring the diameter of the diaphragm including one-half of the surround roll-width. Ten years ago, JL Audio redefined low-frequency reproduction with their masterful, designed-from-scratch W7 subs. Enough sound dampening for the whole car! I have the JL HD 600/4 on my interior speakers and I'm pairing the woofer with the JL HD 750/1 and it's a match made in audio heaven. 10th Anniversary Edition - W7 12-inch Subwoofer Driver (1000 W, 3 Ω) The 12W7AE brings serious performance to the table by combining the breakthrough of the long-excursion W7 … In recent years, several manufacturers have used composite cone materials (Kevlar®, fiberglass, etc.) This means that we can use a large roll for all its benefits without sacrificing cone area (in fact, the 12W7 has 1% more piston area than the medium-surround conventional woofer). 10th Anniversary Edition – W7 12-inch Subwoofer Driver (1000 W, 3 Ω) It has been called “addictive,” “seductive” and “the new subwoofer reference” The JL Audio 12W7AE brings serious performance to the table by combining the breakthrough of the long-excursion W7 design with a large 12-inch bore. A lot of people say that JL Audio is overpriced, and it kind of is, but we all know that good things don't come cheap. Detailed Information:Many speakers employ venting techniques to enhance voice coil cooling. Air inside a port is not part of the effective net volume. ft. (49.6 l) ported enclosure. Stinger's Roadkill sound dampening series is sure to kill unwanted road noise and rattles! I have two blue top Optima's without any capacitors (capacitors are worthless) and the amps have no problems getting the power they need even with the ignition being in the accessory only position. In other words, from the top-center of the surround on one side to top-center of the surround on the other side.\u003c\/p\u003e\n\u003cp\u003eThe displacement capability of a speaker is determined by this piston area times the speaker's excursion capability. Freight damage on returns is not covered under warranty. The tinsel wire naturally has less 'give' than the fabric material of the spider leading to asymmetrical spider behavior and non-uniform stress distribution around the spider circumference. $1,249.99 $ 1,249. An impressive linear excursion envelope that exceeds 0.75 in. This value must be added to the net volume along with the displacement of any braces and\/or ports (if applicable) to arrive at a gross internal volume. JL Audio 12W7AE-3 10th Anniversary Edition - W7 12-inch Subwoofer Driver (1000 W, 3 Ω) The 12W7AE brings serious performance to the table by combining the breakthrough of the long-excursion W7 design with a large 12-inch bore.
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