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.\u003c\/p\u003e\n\u003cp\u003eSince most of our premium loudspeakers incorporate proprietary, patented technologies requiring specific assembly techniques, we find it is vital that the people who designed them have close access to the people manufacturing them. This leads to vastly reduced distortion and faithfully reproduced transients... or put simply: tight, clean, articulate bass.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDetailed Information:\u003c\/strong\u003e\u003cbr\u003eSince 1997, JL Audio has been at the forefront of Finite Element Analysis-based modeling of loudspeaker motors and suspensions. I'll recommend you to ANYONE wanting to do their own audio. 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. for a titanium-alloy cone.\u003c\/p\u003e\n\u003cp\u003eSo why polypropylene? For example, a typical 12-inch woofer with a medium-sized roll has an effective piston area of 81.52 square inches. should subtract 1/4" from each dimension). "– Car&HiFi, March/April 2002 (Germany). 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. Advisors are patient, knowledgeable & willing to go the extra mile. Summary:JL Audio's patented Elevated Frame Cooling design delivers cool air through slots directly above the top-plate to the voice coil of the speaker. The (19 mm) one-way allows it to deliver impact well beyond the range of other 8-inch Subwoofers. The following JL Audio products are built in our Miramar, Florida factory, with global components:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSubwoofers: W7, W6v3, TW5v2, TW3, TW1, W3v3 \u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eEnclosed Car Subwoofers: Stealthbox®, PowerWedge™, ProWedge™, H.O. Co-Extruded Double Lead Wires: The extruded casing and 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. ft. (24.8 l) sealed enclosure, or a 1.0 cu. A major component of this integrated system is DMA (Dynamic Motor Analysis). 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. 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. Find helpful customer reviews and review ratings for 8W7AE-3 - JL Audio 8" Single 3-Ohm W7 Subwoofer Anniversary Edition (8W7-3) at Amazon.com. JL Audio put 30+ years of sonic expertise into their legendary W7 subwoofers, so you can expect smooth, powerful bass that enhances your favorite music. An impressive linear excursion envelope that exceeds 0.75 in. + Shipping to: 98837. “Simply put, the JL Audio 8W7 is the best damn 8-inch subwoofer ever made.”, “...if you're looking for big audiophile sound in a package that requires a small amount of power and space, the JL Audio 8W7 isn't a good choice, it's the only choice.”, – Paul Sonoda, Car Sound and Performance, June 2004, "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. )\u003c\/td\u003e\n\u003ctd style=\"width: 50%;\"\u003e1.00 cu ft \/ 28.3 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%;\"\u003e18.75 in \/ 476 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%;\"\u003e12.875 in \/ 327 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%;\"\u003e14 in \/ 356 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%;\"\u003e1.375 in \/ 35 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%;\"\u003e11.375 in \/ 289 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%;\"\u003e27.875 in \/ 708 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%;\"\u003e13.1875 in \/ 335 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%;\"\u003e36.8 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%;\"\u003e30.1 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). prematurely. Compare this to a fat-surround 12-inch woofer which has a piston area of 69.07 square inches (15.2 % less effective piston area than the medium-size roll.) 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:\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003eLinear motor force over the speaker's operational excursion range\u003c\/li\u003e\n\u003cli\u003eConsistent motor force with both positive and negative current through the coil\u003c\/li\u003e\n\u003cli\u003eConsistent motor force at varying applied power levels\u003cbr\u003e \u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003eOur 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.\u003c\/p\u003e\n\u003cp\u003eThe payoff is reduced distortion, improved transient performance and stellar sound quality.\u003c\/p\u003e\n\u003cimg src=\"https:\/\/embed.widencdn.net\/svg\/jlaudio\/yxmmtifisw\/JLA-W-Cone-logo.svg?u=fhkrg%20alt=\" w=\"\" cone=\"\" width=\"200\"\u003e\n\u003ch3\u003eW-Cone (U.S. Patent #6,496,590)\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eSummary:\u003c\/strong\u003e\u003cbr\u003eThe W-Cone is a unit-body cone assembly that delivers astonishing cone stiffness with minimal mass. Hard techno beat attacks really bring the W7's special dynamic qualities to light, even fat, brutal synthesized bass blasts cannot exceed this woofer's reserve capabilities… A \"Killerwoofer\".\"\u003c\/p\u003e\n\u003cp\u003e\"The W7 is a woofer which has it all. If analyzed in terms of weight per square inch of piston area, the W7 cone-body weighs 1.24g/sq.in., compared to 1.45g/sq.in. 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. \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. Paper, metal or brittle composite cones would not handle this well. Progressive-Roll Spider: The large, progressive-roll spider Please confirm that this adapter will work with the stereo you intend to use. dynamic parameter shifts and power compression. My Bio: I do not have an official reason on why it is done, but I think it is done to help ensure that this subwoofer, or two of them, is used with an amp of similar build quality like their HD or Slash series amps which output the same power from 1.5-4 ohms 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). Getting hands-on with our products helps us pick what's best for our customers. This not only enhances power handling, but also sound quality by minimizing dynamic parameter shifts and power compression.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDetailed Information:\u003cbr\u003e\u003c\/strong\u003eMany speakers employ venting techniques to enhance voice coil cooling. These modeling routines are intense, requiring hours to run for a whole speaker.\u003c\/p\u003e\n\u003cp\u003eDMA is able to analyze the real effects of fluctuating power and excursion upon the magnetic circuit of the motor, specifically the dynamic variations of the \"fixed\" magnetic field. Not only are its ingenious technical solutions impressive, but also its sonic abilities which leave no desire unfulfilled. Product with defaced, altered or removed serial numbers (no valid, legible serial number = no warranty).\u003cbr\u003e2. OverRoll Surround: OverRoll Surround technology allows JL Audio Air inside a port is not part of the effective net volume. DMA is JL Audio’s proprietary Dynamic Motor Analysis system and is aimed at improving dynamic motor behavior. Product that has been physically abused (run over by a car or beat with a hammer, for example).\u003cbr\u003e4. for ample current carrying capability. Warranty expiration on products returned without proof of purchase will be determined from the manufacturing date code. In other states where we don't collect sales tax, it may be the customer's responsibility to assure that all appropriate state use taxes are paid. (19 mm) one-way allows it to deliver impact well beyond the range of other 8-inch Subwoofers.\u003c\/p\u003e\n\u003cp\u003eThe 8W7AE is best used with amplifier power in the 200W - 500W range and is optimized to operate in a 0.875 cu. Always an excellent experience dealing with Crutchfield for the past 20 yrs. (Automatic Room Optimization) circuitry. Warranty expiration on products returned without proof of purchase will be determined from the manufacturing date code. This feature helps ensure concentricity of the surround, spider and voice coil without torquing the suspension to achieve it. the following dimensions: Searches related to the JL Audio 8W7AE-3 Anniversary Edition W7 Series 8" 3-ohm subwoofer. Six patented technologies help this W7 sub deliver unmatched performance: JL Audio's W7 subs are hand-assembled and tested in Mirimar, Florida. Include description. This leads to vastly reduced distortion and faithfully reproduced transients... or put simply: tight, clean, articulate bass.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDetailed Information:\u003c\/strong\u003e\u003cbr\u003eSince 1997, JL Audio has been at the forefront of Finite Element Analysis-based modeling of loudspeaker motors and suspensions. This means that their use accepts the compromise of added moving mass on the design. If you would like, you may call one of our sales advisors at 1(800)316-3061. By maximizing the effective piston/total footprint ratio, we can deliver more output for a given excursion and outside frame diameter. Because DMA does not rely on a steady-state model, it is able to consider shifts in the circuit elements being analyzed. Summary: Carefully engineered lead-wire design and attachments ensure controlled, quiet lead-wire behavior under the most extreme excursion demands. Therefore, the more air a speaker can ultimately displace, the louder it can play. Calculate ports as solid, not hollow objects.\u003c\/p\u003e\n\u003cp\u003e* 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. 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.\u003c\/p\u003e\n\u003cp\u003eThe dimensions given for the enclosure examples above take all applicable displacements into consideration\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSafety Notice\u003c\/strong\u003e\u003cbr\u003eIt is absolutely essential that the completed subwoofer enclosure is mounted firmly to the vehicle with heavy steel bolts (0.5 in diameter) and large steel washers on both sides of the bolts. Can't recommend him enough as an Advisor. Detailed Information:Managing the lead-wires on a long-excursion woofer is one of the trickier aspects of its mechanical design. Apart from the obvious benefits of amazing your friends as you pull the surround off your speaker, there is a serious technical issue that led us in this design direction: Effective Piston Area ("Sd"). This improves power handling and reduces power compression effects, leading to more linear performance.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDetailed Information:\u003cbr\u003e \u003c\/strong\u003eThis technology differs from a conventionally vented pole-piece in that the air flow is capped off at the top of the pole-piece and directed through machined holes on the outer wall of the pole-piece to the region directly behind the voice coil. 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! Our Vehicle Research Team has taken apart and measured over 28,000 vehicles. It features over half a dozen JL Audio patented technologies - Including, an OverRoll™ Surround, W-Cone technology and a Floating-Cone attach method which are just a few of the JL Audio exclusive assets that set the W7 above any other "high end" subwoofer driver currently on … A slot port is recommended with 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).\u003c\/p\u003e\n\u003cp\u003eThe problem with big surrounds is that they begin to encroach on the effective piston area of the driver. The warranty only applies to the original purchaser from an authorized retailer. Coverage may be invalidated as this date is previous to purchase date. I'm just really blown away by the customer service! Consumer Electronics; Vehicle Electronics & GPS; Car Audio. This means that their use accepts the compromise of added moving mass on the design. By utilizing the pumping action of the spider through this focused air path, a large volume of cool air hits the coil windings directly.\u003c\/p\u003e\n\u003cp\u003eAnother important benefit is that the upper surface of the top-plate (one of the speaker's hottest parts) is directly exposed to cooling air flow, whereas on a conventional design it is isolated from the air flow by the lower flange of the frame. Website user interface is clean, easy to navigate & super helpful customer service. FCAM technology is an innovative method of bonding the surround/cone assembly to I've had this set up for 10yrs & I'm just replacing the W8s now. delivers cool air through slots directly above the top-plate to the voice coil. Because the user can tug on the cone while manipulating the surround, the cone must be able to handle this without buckling or deforming. JL AUDIO SGR-8W7Grille rods for 8" W7 subwoofersGENERAL FEATURES:Two 8.265" aluminum barsOne 10.845" aluminum barInstallation InstructionsGrille TemplateJL Audio SGR-8W7 owner's manualWarranty: 1 yearAbout the JL Audio SGR-8W7JL Audio made special grilles to highlight the appearance of their unique W7 Series subwoofers. provides precise control and motor/voice coil alignment without limiting excursion He makes everything easy, clear and comfortable. 07-13 Toyota Tundra Double Cab-Black black Stealthbox enclosure fits under the driver side rear seat,one 8" W7 subwoofer,power handling: 150-500W RMS more 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. support greater x-max without sacrificing cone area. Functionally, they are identical to the original W7's, but are they distinguished by the following cosmetic differences:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSatin-Black Powdercoated Baskets\u003c\/li\u003e\n\u003cli\u003eBright Anodized Surround Clamp Ring\u003c\/li\u003e\n\u003cli\u003eAnniversary Edition Cone Badge\u003c\/li\u003e\n\u003cli\u003eAnniversary Edition Terminal Label\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- split: SPECIFICATIONS :--\u003e\u003c!-- accordion: General Specifications --\u003e\n\u003cdiv\u003e\u003cimg src=\"https:\/\/embed.widencdn.net\/svg\/jlaudio\/e7lqzkw2zb\/8W7AE_PC.svg?u=ndijqi\" alt=\"Power Chart for 8W7AE Subwoofer with ideal Power Range of 200 - 500 W\"\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003ctable border=\"1\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 50%;\"\u003eContinuous Power Handling (RMS)\u003c\/td\u003e\n\u003ctd style=\"width: 50%;\"\u003e500 W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 50%;\"\u003eRecommended Amplifier Power (RMS)\u003c\/td\u003e\n\u003ctd style=\"width: 50%;\"\u003e200 - 500 W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 50%;\"\u003eNominal Impedance (Znom)\u003c\/td\u003e\n\u003ctd style=\"width: 50%;\"\u003e3 Ω\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c!-- accordion: Physical Specifications --\u003e\n\u003cdiv\u003e\u003cimg src=\"https:\/\/embed.widencdn.net\/svg\/jlaudio\/esijhpnh5q\/8W7AE_Dimensions.svg?u=ndijqi\" alt=\"Lineart Bottom-View and Side-View of 8W7AE Subwoofer with dimension labels A-E\"\u003e\u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003ctable border=\"1\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 50%;\"\u003eNominal Diameter\u003c\/td\u003e\n\u003ctd style=\"width: 50%;\"\u003e8.0 in \/ 200 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 50%;\"\u003eOverall Diameter (A)\u003c\/td\u003e\n\u003ctd style=\"width: 50%;\"\u003e8.5 in \/ 216 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 50%;\"\u003eMounting Hole Diameter (B)\u003c\/td\u003e\n\u003ctd style=\"width: 50%;\"\u003e6.94 in \/ 176 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 50%;\"\u003eBolt Hole Circle Diameter (C)\u003c\/td\u003e\n\u003ctd style=\"width: 50%;\"\u003e7.39 in \/ 188 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 50%;\"\u003eMotor Outer Diameter (D)\u003c\/td\u003e\n\u003ctd style=\"width: 50%;\"\u003e5.79 in \/ 147 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 50%;\"\u003eMounting Depth (E)\u003c\/td\u003e\n\u003ctd style=\"width: 50%;\"\u003e6.83 in \/ 173 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 50%;\"\u003eDriver Displacement\u003c\/td\u003e\n\u003ctd style=\"width: 50%;\"\u003e0.06 cu ft \/ 1.7 L\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 50%;\"\u003eNet Weight\u003c\/td\u003e\n\u003ctd style=\"width: 50%;\"\u003e17 lb \/ 7.8 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c!-- accordion: Parameters --\u003e\n\u003ctable border=\"1\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 50%;\"\u003eFree Air Resonance (Fs)\u003c\/td\u003e\n\u003ctd style=\"width: 50%;\"\u003e35.2 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 50%;\"\u003eElectrical “Q” (Qes)\u003c\/td\u003e\n\u003ctd style=\"width: 50%;\"\u003e0.654\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 50%;\"\u003eMechanical “Q” (Qms)\u003c\/td\u003e\n\u003ctd style=\"width: 50%;\"\u003e9.5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 50%;\"\u003eTotal Speaker “Q” (Qts)\u003c\/td\u003e\n\u003ctd style=\"width: 50%;\"\u003e0.612\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 50%;\"\u003eEquivalent Compliance (Vas)\u003c\/td\u003e\n\u003ctd style=\"width: 50%;\"\u003e0.61 cu ft \/ 17.4 L\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 50%;\"\u003eOne-Way Linear Excursion (Xmax)*\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%;\"\u003eReference Efficiency (no)\u003c\/td\u003e\n\u003ctd style=\"width: 50%;\"\u003e0.11%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 50%;\"\u003eEfficiency (1 W \/ 1 m)**\u003c\/td\u003e\n\u003ctd style=\"width: 50%;\"\u003e82.7 dB SPL\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 50%;\"\u003eEffective Piston Area (Sd)\u003c\/td\u003e\n\u003ctd style=\"width: 50%;\"\u003e38 sq in \/ 0.0245 sq m\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 50%;\"\u003eDC Resistance (Re)\u003c\/td\u003e\n\u003ctd style=\"width: 50%;\"\u003e2.78 Ω\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\"\u003e\n\u003cp\u003e* Xmax specifications are derived via one-way voice coil overhang method with no correction factors applied.\u003cbr\u003e** Efficiency (1 W \/ 1 m) is not an accurate indicator of a subwoofer’s output capability and should not be used as a comparison to other subwoofers to determine which one is “louder”.\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c!-- accordion: Sealed Enclosure Specifications --\u003e\n\u003cdiv\u003e\u003cimg src=\"https:\/\/embed.widencdn.net\/svg\/jlaudio\/drxs4zxm44\/Sealed_ENC_Dimensions.svg?u=ndijqi\" alt=\"Lineart diagram of empty sealed enclosure with Height (H), Width (W) and Depth (D) and port length (L) and port inner-diameter (ID) dimension 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%;\"\u003e0.75 in \/ 19 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 50%;\"\u003eVolume (net int. A major component of this integrated system is DMA (Dynamic Motor Analysis). for an aluminum-alloy cone and 1.66g\/sq.in. Lead-wires that are attached or woven into the spider material can alter the spider's "stretching" behavior. Earn one point for every dollar you spend on gear from us. Detailed Information: One of the first things you notice about a W7 is that something is "missing"... the mounting flange. The top portion of the pole-piece is smaller in outside diameter where the holes vent and helps create a high-volume, high-velocity airflow path between the inner-coil cavity and the ambient air of the enclosure.This helps remove super-heated air that is trapped between the coil former and pole-piece on a conventional design, leading to a dramatic improvement in cooling efficiency, especially at high excursions.

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