![]() Additionally, all of the inductors are wound in house with very high-purity copper while large-gauge wire is used for the bass components to minimise signal losses.ĭiscerning audio professionals always appreciate that exceptional passive monitors require exceptional amplification as far as the SCM12 Pro is concerned, the best possible results will be achieved when it is partnered with ATC’s own range of stereo power amplifiers. Indeed, the capacitors are all 250Vdc metalised polypropylene and all the inductors are air-cored types for minimal signal distortion. Put it another way: by employing exceptional drive units, the passive crossover can, by design, use the minimum number of components in a simple, second-order implementation. Meaningfully, judgements and decisions can be made more quickly, more accurately, and for longer periods of time by busy working audio professionals. Speaking acoustically, this construction creates a smoother on- and off-axis frequency response and also a reduction in distortion leading to a more lifelike reproduction of source material. Cone construction is courtesy of another proprietary ATC technology that represents another advance in driver performance - namely, Constrained Layer Damping (CLD), a process that uses multiple laminated fabric cones to form a stiff, light, and tremendously well-damped structure. Using a 45mm/1.75-inch diameter voice coil, and employing an FEA (Finite Element Analysis) optimised high-energy symmetric gap motor system, the driver is capable of tremendous dynamic range with minimal power compression. Listener fatigue is also greatly reduced, resulting in users being able to work for longer periods with greater accuracy.Īt the lower end of the frequency spectrum, mid/bass reproduction is handled by ATC’s 150mm/six-inch proprietary CLD drive unit. The result is an extended high-frequency response with much greater clarity and definition due to the reduction in disturbing anharmonic distortion. Unlike conventional tweeters, this precision part employs two suspensions, offering far greater control of the voice coil and dome motion - especially at higher sound pressure levels. The tweeter is a 25mm/one-inch soft-dome designed around ATC’s unique dual-suspension technology. ![]() Though the SCM12 Pro is the most affordable model in ATC’s professional range of loudspeakers, the monitor makes use of the company’s celebrated drive units for both the mid/bass and tweeter, both being meticulously hand built at its UK facility. You are ready to go!Įdit: update, I just found in that site that these are in fact sealed enclosures.The ATC SCM12 Pro passive monitors combined with the ATC P1 Pro dual mono amplifier perfectly compliment each other offering exceptional near-field monitoring in a compact package.Īs an all-new design, the ATC SCM12 Pro proffers ATC’s acclaimed performance at a lower price point without compromising component quality and achieves this in a more compact, installation-friendly footprint ideally suited to nearfield monitoring as well as multichannel music and post-production applications. I think you are almost set to make your clone! Where did you get your bass driver, if I might ask?Įdit: update, I just found in that site that these are in fact sealed enclosures. This is likely the most critical set of dimensions, as it will dictate diffraction performance, and dispersion - things likely matched to your crossover.Īfter that, you have the length and width of the front baffle, and therefor you can calculate depth as you know your volume needs to be 20L. You can then use the dimensions of the picture (and then apply your calculated ratio) to determine fairly accurately the dimensions of the real-world front baffle. Compare that with the dimensions of your real driver, and you will have a ratio describing the scale of that picture. Print up a nice picture of the front baffle layout, then measure the dimensions of the driver cut-out. ![]() But if it is sealed, you could approximate the front baffle dimensions based on the pictures given in that website. The last bit of trouble is in the question: is it sealed or ported? I'm not sure. Well, you have the drive units, and the cross-over schematic, and you know that the enclosure is supposed to be 20L in volume (as taken from that site referenced above).
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