MoFi SourcePoint 10, 2-Wege Koaxial-Lautsprecher mit hohem Wirkungsgrad (Paarpreis ohne Ständer) Antrieb für eine unglaubliche LeistungDas Herzstück des SourcePoint 10 ist das innovative Twin-Drive High-Flux-Neodym-Magnetsystem.Es reicht nicht aus, nur den Frequenzgang des Tief- und Hochtöners zu optimieren. Es ist auch von entscheidender Bedeutung, die Verzerrungen in der Motorstruktur der Antriebseinheit zu minimieren. Wenn der Motor Verzerrungen aufweist, erzeugt er neue Frequenzen außerhalb des ursprünglichen Signals. Wir haben den Motor sehr bewusst konstruiert, um diese Verzerrungen zu reduzieren.Das Twin-Drive-System erzeugt ein vollständig symmetrisches Magnetfeld, wodurch die Flussmodulation eliminiert wird und die Intermodulationsverzerrung (IMD) extrem gering ist. Diese technische Errungenschaft ist ein wichtiger Grund, warum der SourcePoint 10 so rein und präzise klingt. Nein, er wird nicht Ihren zeitreisenden DeLorean antreiben, aber er liefert die Leistung, nach der Sie gesucht haben.Der 10-Zoll-Cocentric-Treiber. Zwei Treiber. Eine Stimme.Der brandneue 10-Zoll-Concentric-Treiber wurde von Andrew Jones in 18-monatiger Forschungs- und Entwicklungsarbeit entwickelt und bietet eine atemberaubende Klarheit und tiefe Basswiedergabe.Die 10-Zoll-Papiermembran hat fast die 2,5-fache Oberfläche eines typischen 6,5-Zoll-Tieftöners und muss sich kaum bewegen, um einen großen und dynamischen Klang zu erzeugen. Dadurch wird ein konsistenter Wellenleiter um den Hochtöner herum aufrechterhalten, um einen möglichst kohärenten Klang mit geringsten Verzerrungen zu erzielen, ohne dass der Bass beeinträchtigt wird.In der Mitte des Tieftöners befindet sich ein 1,25-Zoll-Softdome-Hochtöner mit einer Breitbandsicke und einer Schwingspule mit großem Durchmesser. Der Hochtöner verfügt über eine hohe Belastbarkeit und eine minimale thermische Kompression, so dass er bei 1,6 kHz einsetzt und einen gleichmäßigen Frequenzgang über 30 kHz hinaus liefert.Die beiden Treiber arbeiten zusammen, um einen reinen und kraftvollen Klang zu erzeugen.Hochwertige Gehäusekonstruktion. Verstrebt für KlarheitEin großer Tieftöner erfordert ein großes Gehäuse, das nicht zu Resonanzen führt. Der SourcePoint 10 verwendet dicke MDF-Platten und umfangreiche interne Verstrebungen.Die Oberseite, der Boden und die Seiten bestehen aus 1 Zoll dickem MDF, das mit schönem Echtholzfurnier ummantelt ist. Die facettierte vordere Schallwand besteht aus 2 Zoll dickem MDF und ist mit einer glatten, satinschwarzen Beschichtung versehen.Zwei interne Verstrebungen verbinden die Oberseite, die Seiten und den Boden, um das Gehäuse weiter zu verstärken.Einfacher Betrieb mit der Elektronik, die Sie liebenMit einer Empfindlichkeit von 91 dB kann der SourcePoint 10 mit einer Leistung von nur 30 Watt betrieben werden.Mit einer Nennimpedanz von 8 Ohm und einer Mindestimpedanz von 6,4 Ohm ist sie sehr verstärkerfreundlich.Ganz gleich, ob Sie Röhren oder Transistoren bevorzugen, Ihr Verstärker wird sich gut mit diesen Lautsprechern vertragen.Vielfältige 2-Zoll-SchallwandDie vordere Schallwand ist der Startpunkt für Ihren Lautsprechertreiber. Sie muss stabil und frei von Schallreflexionen sein.Der SoucePoint 10 verwendet eine geformte Schallwand mit mehreren Facetten, um Beugung zu vermeiden. Alles, was Sie hören, ist die sanfte und gleichmäßige Reaktion des Treibers, nicht der Klang des Gehäuses.Einfach zu verwendende magnetische GitterSie können Ihre SourcePoint-Lautsprecher schnell und einfach unauffälliger machen, um sie in der Freizeit zu hören. Die stoffummantelten Abdeckungen werden magnetisch befestigt und passen sich perfekt an das Profil der markanten, facettenreichen Schallwand an.Um die beste Leistung zu erzielen, empfehlen wir, die Gitter während des Hörens abzunehmen.Echtholzfurniere in MöbelqualitätSie können sich für die Wärme und den Reichtum von Satin Walnut oder den unauffälligen, professionellen Look von Satin Black Ash entscheiden. Für den SourcePoint 10 werden Echtholzfurniere in Möbelqualität verwendet, die so aufeinander abgestimmt sind, dass die Maserung beider Lautsprecher spiegelbildlich ist.Der SourcePoints 10 bietet eine einzigartige Kombination aus modernem und klassischem Stil, die zu einer Vielzahl von Inneneinrichtungen passt.Technische Daten Frequenzgang: 42Hz-30kHz Nennimpedanz: 8 Ohm, mindestens 6,2 Ohm Empfindlichkeit: 91dB/2.83V/1m Übergangsfrequenz: 1,6kHz Empfohlene Mindestleistung: 30W Maximale Eingangsleistung: 200W Physikalische Daten Abmessungen (BxHxT) mit Gitter: 368 x 572 x 422 mm Abmessungen (BxHxT) ohne Gitter: 368 x 572 x 406 mm Gewicht: 21kg pro Stück Merkmale 10-Zoll konzentrischer Treiber 1,25-Zoll-Weitwinkel-Weichkalotten-Hochtöner Belüftetes 2-Wege-Gehäuse Echtholzfurnier Walnuss satiniert oder Esche schwarz satiniert 5-Wege-Anschlussklemmen Magnetische Abdeckungen English InformationDrive To Achieve Incredible PerformanceThe heart of the SourcePoint 10 is the innovative Twin-Drive high-flux neodymium magnet system. It is not enough to simply optimize the frequency response of the woofer and tweeter. It is also critically important to minimize distortion in the motor structure of the drive unit. If the motor has distortion, it will generate new frequencies outside of the original signal. We have been very deliberate with the design of the motor to reduce these distortions.The Twin-Drive system creates a fully symmetrical magnetic field, eliminating flux modulation for extremely low intermodulation distortion (IMD). This technical achievement is an important part of why the SourcePoint 10 sounds so pure and accurate. No, it won’t power your time-traveling DeLorean, but it will deliver the performance you’ve been searching for. The 10-Inch Cocentric Driver. Two drivers. One Voice.Custom-developed by Andrew Jones through 18 months of R&D, the all-new 10-inch Concentric driver delivers stunning clarity and deep bass impact.The 10-inch paper-pulp cone has nearly 2.5x the surface area of a typical 6.5-inch bass driver, and barely needs to move in order to produce large and dynamic sound. This keeps a consistent waveguide around the tweeter for the most coherent sound possible, with the least amount of distortion, and without sacrificing bass. Fitted centrally within the bass driver is a 1.25-inch soft dome tweeter with a wide-roll surround and large diameter voice coil. The tweeter has great power handling and minimal thermal compression, allowing it to come in at 1.6kHz and deliver smooth response beyond 30kHz. The two drivers work together as one to create sound that is pure and powerful.High-Qualtiy Cabine Construction. Braced For ClarityA large woofer requires a large cabinet that won’t add resonance. The SourcePoint 10 uses thick MDF panels and extensive internal bracing. The top, bottom, and sides are 1-inch thick MDF wrapped in beautiful real wood veneer. The faceted front baffle is 2-inch thick MDF finished in a smooth satin black coating. Two internal braces connect the top, sides, and bottom to further strengthen the cabinet. Easy To Drive With The Electronics You LoveWith 91dB sensitivity, the SourcePoint 10 can be driven with as little as 30 watts of power. The nominal impedance of 8 ohms and a minimum impedance of 6.4-ohms means they are amplifier friendly. Whether you prefer tubes or transistors, your amp will pair well with these speakers. Multi-Faceted 2-Inch Thick BaffleThe front baffle is the launch point for your speaker driver. It needs to be strong and free of sound reflection. The SoucePoint 10 uses a sculpted baffle with multiple facets to eliminate diffraction. All you hear is the smooth and even response of the driver, not the sound of the cabinet. Easy To Use Magnetic GrillsIt’s quick and easy to make your SourcePoint speakers more discrete for casual listening. The fabric-wrapped grills attach magnetically and are perfectly form-fitting to retain the profile of the distinguished multi-faceted baffle. For the highest performance, we recommend removing the grills while listening. Furniture Grade Real Wood VeneersYou can choose the warmth and richness of Satin Walnut or the stealthy professional look of Satin Black Ash. The SourcePoint 10 uses furniture-grade real wood veneer that is book matched for mirror-imaged grain patterns on both of your speakers. The SourcePoints 10 has a unique combination of modern and classic style which suits a wide variety of interiors. Technical DetailsElectrical Specs Frequency Response: 42Hz-30kHz Nominal Impedance: 8 Ohms, 6.2 Ohms minimum Sensitivity: 91dB/2.83V/1m Crossover Frequency: 1.6kHz Minimum Recommended Power: 30W Max Power Input: 200W Physical Specs Dimensions (WxHxD) with grille: 368 x 572 x 422mm Dimensions (WxHxD) without grille: 368 x 572 x 406mm Weight: 21kg each Features 10-inch concentric driver 1.25-inch wide roll soft dome tweeter 2-way vented box Satin Walnut or Satin Black Ash real wood veneer 5-way binding posts magnetic grillesMoFi Electronics SourcePoint 10 White PaperAndrew JonesChief Loudspeaker Designer, Mobile Fidelity ElectronicsMy aim for SourcePoint 10 was straightforward: Create a loudspeaker inspired by the needs of the mastering studioand able to reproduce as best as possible the sound I’ve envisioned over my 40-year career, all the while providingdeep bass impact and delivering the highest-possible value to listeners. That left a lot of leniency for what the designshould be — from the technical aspects of the drive units and cabinet to the visual design.Coincidentally, my primary technical consideration for SourcePoint 10 was the incorporation of a concentric driver.Departing from my previous designs, I used a large-diameter woofer to meet the needs of excellent bass capabilitywhile maintaining all the benefits of a concentric design. This approach required something new — and presented achallenge I enjoyed working on for nearly two years.First, the Basics of Sound ReproductionTo understand the benefits of concentric drivers, let's go back to basics and what is involved to reproduce the fullaudio spectrum from the mid-20Hz range all the way up to 20-30kHz.The physics of sound generation shows us that, for any sound pressure level, to produce low frequencies we mustmove a large volume of air — but do so relatively slowly. Conversely, to reproduce high frequencies, we only needto move a small volume of air — but have to move it very fast. These two requirements are very different andrequire distinct designs for the drivers that create the sound. It is almost impossible to achieve that in a single driveunit. The near-universal solution is to split the spectrum into a minimum of two ranges (low and high) and employ adedicated bass driver and a dedicated tweeter optimized for their particular frequency range.In order to move enough air at low frequencies, the bass driver needs to have a large diameter or long throw, or acombination of both. This results in a high moving mass that restricts high-frequency response but that is acceptablesince it is only required to reproduce low frequencies. In contrast, the tweeter needs to be small in diameter and verylight in order to respond all the way up to 20kHz. By splitting the signal to two individual drivers, however, weintroduce new problems into the design.These issues fall into three categories:• The drivers are now spatially separated. The tweeter is mounted onto the surface of thefront baffle of the loudspeaker, and typically, directly above the woofer. Because we can audiblydiscriminate the height of a sound source, we are aware that the sound of certain instruments is nowspatially split — and it sounds unnatural.• The separation causes changes in how the two drivers integrate when we change ourlistening position, particularly our listening height, in the region of the crossover frequency. Depending on where we listen, and because our relative distance — and hence, timing — to each driver has changed, wewill experience response nulls or peaks.• Sound sources uniformly radiate all around at low frequencies. As the frequencyincreases, the source becomes more directional and focuses the sound forward at the expense of the side.Driver size governs the frequency of the transition of directionality. A typical six-inch driver will startaround 800-1,000Hz but a tweeter, being much smaller in diameter, will only start around 5,000-8,000Hz.This results in an off-axis response that is non-uniform across the frequency range, with power dips at thecrossover frequency —as well as non-uniform directivity and room response.The Fix? The Concentric SolutionIf we centrally locate the tweeter within the bass driver — the essence of what we mean by a concentric driver —we eliminate all the aforementioned issues.The tweeter is mounted on the center axis of the woofer and is positioned at the apex of the cone. The common axisremoves the spatial disparity and eliminates the distance and timing differences since the listener location ischanged.Locating the tweeter at the apex of the cone also allows the cone to act as a waveguide for the tweeter. The purposeof a waveguide is controlling the directivity of the sound source. In this configuration, it matches the directivity ofthe tweeter through the crossover frequency range to that of the woofer. The off-axis responses now become muchbetter matched, resulting in improved directivity and room response. Waveguides also improve the low-frequencyefficiency of the tweeter by up to 10dB.This is all good. But what can we do to make it better?Improving the ConcentricAs the sound spreads away from the tweeter and up the cone, it encounters the woofer surround – typically, a half-roll shape that disrupts the wave propagation. It causes re-radiation that interferes with the direct sound from thetweeter to produce dips and peaks in the response, typically in the 10-20kHz region. The greater the required wooferexcursion, the larger the surround needs to be — and, hence, the more the disruption.A second problem happens when the woofer cone is moving. Its location with respect to the tweeter changes fromthe extreme of being in front of the tweeter location to being behind it. This positional shift causes changes in thetweeter response, resulting in intermodulation distortion, decreased clarity, and added sonic harshness —particularly with vocals. Both issues can be fixed by limiting the motion of the woofer. We can now use a low-profile surround to minimizedisruption of the wavefront. The reduced displacement greatly lessens the frequency-response variations of thetweeter due to cone position. By minimizing cone motion, however, we potentially reduce how much bass we canproduce.Minimizing Movement, Not BassFor every octave of restricted bass response, the required cone movement reduces four-fold — a significant amount.If we use the concentric driver just as a midrange driver and add a dedicated bass driver via suitable choice ofcrossover frequency, we drastically minimize cone movement. This arrangement makes for a very complex solution,however. Not only do we now have three drivers, but we need extra crossover components that tend to be bulky andexpensive.The other approach is to simply increase the cone area. As previously explained, bass level is a combination of conearea multiplied by excursion. We can trade one for the other by using a large driver that allows us to stay with thesimplicity of a two-way system. This approach is adopted in SourcePoint 10, where a 10-inch-diameter woofer iscombined with a low-profile multi-roll surround. By its nature, it meets the goals of our original design brief. Big Cones Are Better — Right?The decision to use a large-diameter woofer presents its own complications. The ideal woofer cone would have noresonances within or close to its operating range. Resonances are problematic; they color the sound of the driver andobscure detail. When designing cones, minimizing resonances is critical, but doing so becomes more difficult as weincrease cone diameter and operate it over a wider frequency range.Every material we consider for woofer cones will eventually go into breakup, causing resonances. It’s just a matterof how high in frequency — and how well-damped — those resonances are. Exotic materials, like beryllium,attempt to push resonances to much higher frequencies. While such materials may work for smaller woofers, theyare either of limited benefit for larger drivers, unaffordable, or cannot be made at a larger size.Surprisingly, paper has the ideal combination of material properties and is the best solution to create the cone weneed. After experimenting with a variety of paper pulp mixes and cone shapes, we developed a custom-tooledsolution that both optimizes the resonance behavior and meets the shape requirement for the waveguide.Low to HighOur next task was to choose a crossover frequency below the breakup mode of the cone. We determined theoptimum frequency to be 1.6kHz.This required a tweeter capable of working down that low, necessitating the use of a large-diameter voice coil of28mm (approximately 1.1-inch) diameter and a soft dome with a wide-roll surround. The wide surround profileextends both the low- and high-frequency response of the tweeter, while the loading effect of the waveguidesignificantly increases low-end efficiency. The robust power handling, minimal thermal compression, and greatlylower excursion requirement allows the use of a low 1.6kHz crossover while keeping the distortion very low.Drive StraightOptimizing the frequency response of the woofer and tweeter is not enough; we also need to minimize distortion inthe motor structure of the drive unit. Though the cone is designed to push the resonances beyond the crossoverfrequency, that is not sufficient in a nonlinear system. The crossover filters the signal going into the cone, not thesignals coming out of it.If the motor has distortion, it will generate new frequencies outside of the crossover band limit. These signalsdirectly enter the cone and excite the resonances. In SourcePoint 10, we have been very diligent with the design ofthe motor to reduce these distortions, which are typically caused by three primary mechanisms.The first is non-symmetrical flux distribution in and beyond the magnet gap, which causes non-constant and non-symmetrical force to be applied to the coil as it moves in and out of the gap. The second factor is the interactionbetween the fixed field created by the permanent magnets, with the varying field created by the current in the voice coil. This varying field can modulate the fixed field and cause distortion. The third factor is non-constant voice coilinductance, which can vary with the position of the coil and the current level through it.In SourcePoint 10, careful design of the magnet structure has made the flux field fully symmetrical. The result isshown in the accompanying chart displaying the flux profile and force profile.To minimize the flux modulation, our motor design uses copper through and beyond the magnet gap. Opposingmagnet structures cancel the flux modulation. This symmetry, along with the copper in the gap and a structure thatkeeps constant the amount of metal and magnet (no matter the coil position), minimizes inductance variation. Thetweeter motor structure also uses copper in the gap to minimize inductance variation. By utilizing a high-fluxdensity in the gap, along with partial saturation of the pole, flux field modulation gets minimized.Twin DriveAbiding by the requirement that the tweeter motor structure fit within thevoice-coil diameter of the woofer, typical concentric driver designsfeature tweeters with relatively low sensitivity. SourcePoint 10 uses acompound motor structure named Twin Drive to solve this issue. Themagnets of the woofer and tweeter motor deliberately couple together sothat each aids the other in driving flux across both the woofer and tweetergaps. The result: Greater flux density than either motor can achievealone, resulting in a tweeter gap flux density of 1.35T. Boxed InA large woofer requires a large cabinet. SourcePoint 10 has an internal cabinet volume of 50 liters, or almost twocubic feet. Because of the relationship between box size, low-frequency extension, and efficiency, this volume canbe traded to gain both bass extension and efficiency. SourcePoint 10 has a sensitivity of 91dB, low-frequency pointof 42Hz, and true eight-ohm impedance with a minimum of 6.4 ohms at 150Hz. This makes SourcePoint 10 veryeasy to drive and well-suited to a wide range of amplification.To minimize cabinet resonance, large cabinets require thick side panels and extensive bracing. SourcePoint 10utilizes one-inch-thick MDF panels for the sides, top, bottom, and back of the cabinet — as well as a two-inch-thickfront baffle. Two additional vertical braces connect the top, sides, andbottom to further strengthen the cabinet.The shape of the front baffle also matters. When mounting any driver in acabinet, the cabinet edges will refract and reflect the sound that travelsacross the baffle to the cabinet edge. This radiation interferes with the directradiation from the driver and causes high-frequency response irregularitiesthat vary with listener location. This can be particularly troublesome with aconcentric driver configuration.In SourcePoint 10, such diffraction is greatly reduced by sculpting the baffleto produce multiple facets. The varying distance from the driver to the edgesmooths out the diffraction ripples; the sloping surfaces further minimizethem. As the listener, you benefit by hearing only the smooth, even responseof the driver — not the sound of the cabinet.Hear Through to the RecordingAll the measures employed in SourcePoint 10 combine to allow you to hear further into the recording and get closerto the original source. You’ll be able to hear a great amount of detail even at low listening levels, which lets youconnect with the music more closely and feel the emotion in the performance. Relatedly, the speaker’s low-distortion characteristics mean you can play music at high volume levels without apparent distress.In closing, I hope you get the same joy listening to SourcePoint 10 that I did designing it.