Musicraft
Trade: Musicraft
The world's best subwoofers and the Formula 1 of subwoofers. Unfathomable sub bass by JL Audio -
"The JL Audio Fathom is of reference quality and a benchmark by which all other subwoofers can be judged." - Robert Harley, The Absolute Sound
JL Audio Fathom® v2 subwoofers -
The challenges associated with designing high-output compact subwoofer systems can be daunting. In most cases, designers sacrifice low-frequency extension or output capability to keep the design small.
Our Fathom® v2 subwoofers sacrifice nothing, thanks to the dynamic advantages of their proprietary JL Audio woofers. These exceptional drivers allow for a true subwoofer passband and very high output while keeping distortion well below audible thresholds.
Elevated Frame Cooling
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. This not only enhances power handling, but also sound quality by minimizing dynamic parameter shifts and power compression.Detailed Information
Many speakers employ venting techniques to enhance voice coil cooling. This is typically accomplished by having big holes in the sides of the frame just below the spider attachment shelf. While it provides a modest cooling benefit, this low-velocity air-flow does not blow directly or strongly on the voice coil.Our patented design improves upon this cooling technique in a number of ways. 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. This air path leads directly to the voice coil and then turns upward into the spider air cavity. By utilizing the pumping action of the spider through this focused air path, a large volume of cool air hits the coil windings directly.
Another 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. The elevated frame technology greatly increases thermal power handling, reduces compression effects and does so without any additional parts.
OverRoll™ Surround
By utilizing space wasted in conventional speakers, this ground-breaking innovation controls the W7's massive excursion without sacrificing precious cone area.Detailed Information
One of the first things you notice about a W7 is that something is "missing"... the mounting flange. Of course, this is actually not the case. 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). 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 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. In other words, from the top-centre of the surround on one side to top-centre of the surround on the other side.The displacement capability of a speaker is determined by this piston area times the speaker's excursion capability. Displacement of air is directly linked to output potential. Therefore, the more air a speaker can ultimately displace, the louder it can play. That being said, there is a big difference between piston area and excursion: piston area doesn't need power to make it happen. 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. This is not the only factor that governs efficiency, but it is a major one.
To make a speaker have more excursion capability not only requires a motor design that can deliver more stroke, but also requires a surround rugged enough to handle the demands of longer excursions and controlled enough to keep everything lined up properly. If the surround's roll-width is not adequately large, its behaviour (compliance) is not linear over the useful stroke of the woofer and it is more likely to fatigue and fail. 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).
The problem with big surrounds is that they begin to encroach on the effective piston area of the driver. For example, a typical 12-inch woofer with a medium-sized roll has an effective piston area of 81.52 square inches. 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.) To overcome this loss, the fat-surround woofer has to produce more excursion to displace the same air as the woofer with the medium surround (and will require more power to do so).
OverRoll™ technology neatly sidesteps this compromise by allowing us to make full use of the entire footprint of the speaker, placing the surround further to the outside than in a conventional woofer. 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). By maximizing the effective piston/total footprint ratio, we can deliver more output for a given excursion and outside frame diameter. 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.
The technology also provides a geometry advantage on the outside edge of the surround roll, allowing for more linear operation. A further benefit is that the mounting holes are inherently sealed by the surround, resulting in an improved box seal.
The Benchmark.
Fathom® v2
Fathom® v2 subwoofers are ideal for larger spaces thanks to their higher efficiency and higher power output. The combination of ultra-long throw W7-HT drivers and a very powerful switching amplifier result in jaw-dropping performance capabilities at any listening level. Built with the same driver and amplifier technology as our flagship Gotham® v2, the Fathom® v2 subwoofers deliver low distortion, excellent dynamic capabilities and shockingly deep bass extension that will allow you to experience all the excitement of the most demanding cinematic material, while also being able to reproduce all the nuance and texture of your most delicate musical material.
Built like no other
Fathom® v2 assembly process brings together all the key component groups: drivers, electronics, wire harnesses and enclosures. A single technician assumes responsibility for the complete assembly process. The finished units make a short trip to our testing room for a series of critical performance and electrical tests.
Fathom® v2
JL Audio’s engineering department is at the forefront of research into fundamental loudspeaker behaviour. JL Audio have developed proprietary electromagnetic and suspension analysis systems and invested heavily in state-of-the-art manufacturing and testing.
This has borne subwoofer drivers widely considered as reference standards for linear displacement and dynamic stability. It has also resulted in numerous U.S. and International Patents issued for technologies that refine and extend the performance envelope of the dynamic driver.
Musicraft has JL Audio's Dominion®, E-Sub™, Fathom® v2 and Gotham® v2 Series of subwoofers and the CR-1 Active Subwoofer Crossover in store.
Fathom f113 v2 3000w subwoofer
JL Audio Fathom® v2 subwoofers UK RRP from £3245 to £7499
JL Audio Fathom and Gotham Series drive unit. Unfathomable sub-bass by JL Audio
JL Audio Fathom v2 Series subwoofers. Unfathomable sub-bass by JL Audio
JL Audio Fathom v2 Series subwoofers. Unfathomable sub-bass by JL Audio
Unfathomable sub bass by JL Audio
JL Audio powered subwoofers will unleash the full dynamics of your audio experience.
Our award-winning line up of powered subwoofer systems begins with proprietary subwoofer drivers and amplifier designs, precisely optimized for their intended physical envelopes and design goals. Because of this, they are not limited by which sub-assemblies are openly available on the world market. Instead, each system is fanatically engineered and precision-built in our Miramar, Florida factory to reflect our passion for spectacular audio and product quality.
Gotham®: Your first look will tell you that you are looking at something special... your first listening session will confirm it beyond a shadow of a doubt.
Fathom®: Compact subwoofer systems for those who enjoy demanding program material and will not settle for compromises.
Fathom IWS®: There is no need to lower your expectations when selecting this remarkable in-wall solution... it's a real Fathom®.
E-Sub: These beautifully crafted powered subwoofers offer a compelling combination of high performance and outstanding value.
Dominion: Our latest solutions deliver a unique answer for applications that require a compact, more affordable subwoofer.
Unfathomable sub bass by JL Audio
JL Audio CR-1 Active Subwoofer Crossover -
JL Audio's CR-1 Active Subwoofer Crossover is at Musicraft (Derby). Unfathomable sub bass by JL Audio
The lucky few who have heard a well-integrated subwoofer in a great audio system know that the subwoofer's effect is profound. While everyone expects the bass extension to improve, most are shocked at the transformation that occurs in the main speakers. They simply open up, delivering improved dynamics, superior imaging and more low-level detail. Many describe it as the greatest speaker upgrade they have ever made.
Over the years, we have calibrated many subwoofer systems in highly critical listening environments, and we have been frustrated by the limitations of active crossovers we have worked with. Tired of struggling with "blunt instruments", we felt that a higher precision tool was needed, so we decided to build it and call it "CR-1". When properly set up, CR-1 creates a listening experience in which the subwoofers and main speakers become one, delivering a cohesive and compelling sonic presentation.
The CR-1 Active Subwoofer Crossover has been designed by audiophiles, for audiophiles. We believe it has no equal, offering a powerful combination of subwoofer/satellite tuning features, and a complete commitment to analogue signal purity.
JL Audio CR-1 Active Subwoofer Crossover UK RRP £3549
http://www.theabsolutesound.com/articles/jl-audio-gotham-subwoofer-and-cr-1-crossover/
The Absolute Sound reviews JL Audio's CR-1 Active Subwoofer Crossover
http://www.canadahifi.com/worlds-fi...1-crossover-with-dual-fathom-f112-subwoofers/
Canada Hi-Fi reviews JL Audio's CR-1 Active Subwoofer Crossover
http://www.soundstageultra.com/index.php/equipment-menu/537-jl-audio-cr-1-active-subwoofer-crossover
SoundStage Ultra reviews JL Audio's CR-1 Active Subwoofer Crossover
JL Audio's CR-1 Active Subwoofer Crossover is at Musicraft (Derby). Unfathomable sub bass by JL Audio
JL Audio's CR-1 Active Subwoofer Crossover is at Musicraft (Derby). Unfathomable sub bass by JL Audio
CR-1 is built around two banks of precision Linkwitz-Riley low-pass and high-pass filters. Multiplying DACs with monolithic ratio matching are employed to adjust the analogue circuit's filter frequencies. This offers superior tracking behaviour and far more precise left/right channel balance, compared to conventional approaches.
Another of CR-1's unique and powerful features is a pair of rotary controls that control the damping of each filter bank. These damping controls dramatically improve the acoustic summing through the crossover region, by compensating for each speaker system's frequency response. At the center of the front panel, a single intuitive, rotary control permits quick adjustment of the relative level between the subwoofer(s) and main speakers.
To minimize distortion and noise, CR-1 employs top-grade component parts in its all-analogue audio circuitry: 1% precision resistors, JFET-input audio-grade op-amps, polypropylene film-and-foil capacitors and metallized-polypropylene film capacitors, to name just a few. We also build CR-1 right here in the U.S.A., to ensure top quality and dependability.
CR-1's input-output design makes it equally adaptable to studio, mastering suite or audiophile two-channel playback environments. To accommodate dual-mode systems, we also include a bypass feature that engages a pass-through from a dedicated "Managed Bass Input" on the rear panel, to the CR-1's subwoofer outputs. This makes it convenient to switch from two-channel to multi-channel mode.
CR-1 is the ultimate tool for subwoofer integration.
Website: http://www.musicraft.co.uk (THIS NEW SITE IS BEING EVOLVED)
Please call 01332 346284, 07727 272443 or email [email protected]
Hours of business are Monday to Saturday 9am-8pm, Sunday 10.30am-4.30pm (please call us before travelling)
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Thanks
Rick @ Musicraft
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