Aspen FR20 Loudspeaker

By far the most important piece in the HiFi chain is the loudspeaker. If the speaker cannot reproduce what's it is fed from the electronic chain, the missing musical information is forever lost. To achieve all that music demands, over the years loudspeaker designers have tried to leverage every trick in the book: electrostats for details, conventional drivers for dynamics, planars for transparency, ribbons, domes, horns, open baffles, bipoles, dipoles. The list is endless and the choices and their inevitable sonic compromises daunting. With close to 50 years under our collective belts, we at PS Audio determined to design the perfect loudspeaker. Our strategy would be to combine the best of all possible driver and crossover technologies in a single coherent design. We would call it the FR30 and we would follow it up with a smaller model, the FR20. Both would have unquestioned dynamics. They would be full range and capable of being driven by just about any amplifier. Their high-frequency drivers would have lower mass than the air they were driving and the speed and clarity of the best electrostats. Their midrange driver would be so transparent and uncolored as to be unnoticeable. And our speakers would never be shy when it came to the low end. With the FR20's 4 woofers per pair of speakers supported by 4 high-compliance passive radiators, in-room bass response would be nothing short of legendary.

The heart and soul of any loudspeaker are its drivers, the transducers that in response to the amplifier's demands pressurize the air and generate the music. Each driver must be optimized for the task at hand. In the FR20, it quickly became apparent we could not source from even the most advanced driver manufacturers in the world the ultra low-distortion high-dynamic output drivers we would need to build the FR20. We started with our tweeter and midrange for here are the two most difficult drivers to perfect. Moving air at high frequencies without colorations or distortion is a daunting task. On the FR20 we chose to go with a technology that has the speed of an electrostat with the dynamics of a cone. Planar Magnetics. These ultra-low distortion drivers are equally driven with front and rear magnetic structures that offer inherent linearity through symmetrical “push-pull” neodymium motor structures and directly driven ultra-low mass diaphragms with none of the cone or dome breakup, inductance modulation, or hysteresis distortion that plagues traditional drivers. For the low end, we crafted long-throw high-excursion woofers with massive 12-pound motor structures that match the effortlessness and transparency of the planar magnetic drivers. To lower distortion, we employed a unique split magnetic gap and a double faraday ring for low, linear inductance and wide bandwidth, coupled with a single progressive Nomex spider with stitched-in lead wires. The woofer cones are a low-mass PMI foam core with non-woven carbon fiber skins on each side. Lastly, to achieve maximum linearity and extended deep bass extension without the compression and distortion of ports, we designed our own high-compliance passive radiators.

Loudspeakers have an honored place in our homes. They often are the focal point of our living rooms and in that capacity must proudly make a statement of fitting elegance. The Aspen FR20 enclosure design starts with the internal structure necessary for great sound and then lovingly sculpted into a work of art befitting our homes. With industrial design by famed Studio 63, the FR20 stands as a proud sculpture comfortable in almost every decor. Internally, the FR20 is an extensively braced enclosure designed to minimize external vibrations that have the potential of coloring the sound. Externally, the enclosures are lovingly finished with 20 coats of hand-rubbed high-grade “piano gloss” lacquer. While the main body and baffling structure are built with MDF, the sculpted front baffle is formed from a dense, rigid and well-damped high-tech thermoset fiberglass resin composite material with integrated high-frequency acoustic waveguides. The speakers look to be almost floating as its curved bottom rests upon its sturdy aluminum base featuring large milled brass spikes with removable tips and integrated plastic feet for hard surfaces (and to aid in speaker placement). A masterpiece of design and love, crafted by those of us that care deeply about music and its reproduction in the home.