Design Ideologies
Not everyone is looking to be hammered into submission. On the contrary there’s a whole echelon of discerning audiophiles who desire supreme sound quality above all else. Articulated deep bass, delectably controlled midrange, and supremely accurate highs. Barriers are there to be broken, and budget is of secondary concern. This is the territory of Gladen’s Aerospace drivers. Developed with every detail heavily scrutinised, the Aerospace drivers represent aural perfection in every way. They’ve been developed with the philosophy that anything is achievable once the shackles of compromise are removed.
Energetic Sound
The Aerospace 60 air motion transformer (AMT) tweeter has a clear, dynamic and energetic sound presence; a very good impulse response and a high low distortion.
Coil-Less Concept
Air motion transformers represent a loudspeaker concept that does not require a classic voice coil. Using a thin Kapton foil measuring 12 µm – 25 µm in thickness, against a specially designed conductor track made of thin aluminum also only 12 µm – 25 µm thick); these ribbons move in a reciprocal motion to agitate air.
Wikipedia puts it like this: The diaphragm pushes back and forward from itself in a physical motion similar to that observed when an accordion is pushed in and pulled out to pump air through the reed chambers, albeit over an exceedingly smaller motion range. The result is a dipole driver with an extraordinarily rapid response rate, enabled by the extremely low mass of the polyethylene substrate and the far smaller distance it travels on each “swing” compared to a dynamic driver. In this technical respect, it shares characteristics with an electrostatic driver.
The discernible motion of each diaphragm flexure is very small, but because of the folded structure more air is moved than would be by a conventional cone or electrostatic driver of the same plotted surface area. As a matter of surface comparison, a standard 1″ / 25 mm AMT strip has a functional driver area comparable to an 8″ / 200 mm circular dynamic cone. The folded driver design, combined with the small motion range; means the AMT acts like a point source version of a larger driver, inherently resulting in lower sound reproduction distortion. The speed of the air as it leaves the diaphragm is approximately five times faster than the speed of the actual driver structure, hence the name Air Motion Transformer.
Can We Have That In Plain-Speak
If the above description is a little over the odds for your level of understand let’s break it down a little. Put succinctly; unlike conventional tweeter domes the folded AMT diaphragm in the loudspeaker does not make any movement from the front and to the rear to produce the tones. The movement takes place in the folds. This laterally, similar to a bellows. This causes the air in the convolutions to accelerate and exit the front. One advantage of this technology is that the diaphragm area is larger than the visible area and thus takes up less space. Coupled with the light weight of the diaphragm, this results in a detailed and dynamic reproduction.
In The Workmanship
To achieve high manufacturing precision, the foil is folded by hand using special tools and created using a complex etching processes. All housing parts are elaborately CNC machined, nickel plated, powder coated and then laser engraved. The aluminum frame can be dismantled to allow an even more compact installation. The special copper cable with silicone sheathing and braid protection is directly connected to the membrane to avoid unnecessary transitions or materials in the signal path.
Design Features
The rich heritage of this astute and masterful designer, together with its ever-increasing technical acumen; is conducive to these components featuring a vast array of impressive design ideologies and latest technological advancements. Some of these include:
– Absolute high-end driver.
– Tweeter with air motion transducer (AMT) principle technology.
– Folded kapton diaphragm.
– Made in Germany.
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