PIO Sound Falcon in the Test

A renowned Developer group under the label PIO sets electrostatic series a sensational. stereoplay has the first model in the test.

Gaston of Bastiaens is a technical all-round talent as we today only rarely encounter it. The Belgians, who was responsible for the development and introduction of the CD player in his previous life at Philips in the rank of the Vice President, for many years now is working on perfecting the speakers – and it succumbed to the fascination of electrostatic constructs. His first professional products ran under the Dutch label final and were the only serious competition in the world market leader Martin Logan – in addition to the legendary Quad models – long time. But the economic success of final and Bastiaens withdrew, to ponder about it, how to make the electrostatic even better. The tinkerer found several approaches, which he wants to – put into its new PIO sound models and he found especially veritable contributors.

The perfect team

There, Fink would be alongside the top occupied PIO team that has one of the most accomplished electrostatic developers on board with Ronald Buining, especially Karl-Heinz to name a few. The head of the Fink audio consulting (who has conceived also the Phonosophie DAC 1) is a most competent speakers developers and helped with the acoustic tuning. Even Uwe Kempe came to the project with him. Germany’s profundester space acoustician has researched in the early nineties to dipole subwoofers. Since the smaller PIO models, as the presented Falcon, hybrid designs with conventional woofers, this knowledge is now worth Bastiaens gold. Because one has become aware of the Belgian in his time of reflection: you can an electrostatic dipole radiation surface not just a subwoofer – so good – Add. The combination shines the subwoofer, however, almost spherical forward and backwards in the form of an eight from (so very little energy to the sides).

The construction

With the old final models, the PIOs have in common only the principle, otherwise everything is new. Ronald Buining designed a new slide or its coating together with the University of Eindhoven. Gaston of Bastiaens devised a machine which spans the film set on the framework – by always a weak point in electrostatic. Meanwhile, Uwe Kempe devised a very tricky part of bass that perfectly suits the electrostatic Panel, the Falcon in its dispersion. The measurements below illustrate the effectiveness of this “cardioid” low-frequency system referred to. To achieve the desired dispersion, two 7-inch woofer work together: one closed, one in the open dipole housing. The two drivers are so skilfully controlled by a time delay, that is exactly the desired beam haunch. This is of course only with an active bass. The control of the Watt-sucking part of bass with a 150 watt high power amplifier has an additional advantage: it can the Falcon with small (but please pretty fine!) Operate power amplifiers.

The housing

If you can… speak at the Falcon from a housing Now, the frame that holds the slide, is two centimeters deep and absolutely torsion-resistant aluminium. The lower of the two woofer is together with the electronics in a flanged, small wooden box. Aluminium frame as well as the piece of wood are perfectly crafted; Clearances, as seen in the previous final models, are absolutely wrong.

The measurements

… the Falcon report as a genuine carpets. With a degree of efficiency by 81.5 decibels and 101 decibels maximum sound pressure, the Falcon is not the first choice for techno – or party disciples. The almost linear frequency response and the handsome bass down to 50 Hertz – a small case to convince much more here! Schön. Not so nice, but absolutely typical for electrostatic is the very low impedance to the tweeter. Because little power flows above 10 000 hertz, which plays hardly any role. Except for tube amps: not good deal their transformers with low impedances.

The establishment of

… is an important issue, as all dipole radiators in the Falcon because it just once again radiates the same energy as forward backwards. Nevertheless, there were amazingly few problems in the listening room. After a few attempts, the correct position was found; It sounded properly even with the right middle – for electrostatic – distance from 70 centimetres to the rear wall. But the special bass behavior of Falcon allows even a perfect playback with some effort and knowledge. Pereskiopsis bass radiation the user can avoid particularly annoying Dröhn resonances with a little luck the suggestion: a great advantage.

Great uniformity

The first and also the permanent sound impression of the Falcon can be described in these two words. There has never been a falling apart of combination and bass, the bass range was always a part of a harmonious whole. Anyway: The Falcon produces a bass that you rub your eyes. Where it takes only the substance, how do these precision kick bass? The PIO woofer awarded themselves the wabernd sounding electric bass by underworld (“beaucoup fish”) structure and order. Here also the beam pattern plays a role in addition to the excellent design. We could put the Falcons up that the disturbing room modes were not stimulated. Nothing was the bass also level moderate to blame; here rather limited the midrange Panel, which pointed to his overload with a subtle crackling. There we speak already of really high volume. At normal levels, the sonic performance of the Falcon is a dream: to the two surfaces are sound images of high accuracy, but also great beauty. The spatial imaging and the impulsiveness of single noise events come naturally from the land; Everything flows, everything sounds absolutely realistic.

Voice Constanze Friend (“Wonderful World”) sounds exactly like the Falcon breathe them of their electrostatic panels. A great speaker.

Opinion

At last. The still to little-noticed segment of electrostatic motion comes again. With its discreet appearance and their wonderfully homogenous reproduction, the PIO is best Ambassador for their style of play.

Technology in detail

Dispersion in the bass The dispersion of the electrostatic is dipolar due to its open back design. This results in a beam haunch very similar to an eight. Because electrostatic are usually little bass fit for size of Falcon, a combination with a conventional subwoofer is useful – but unfortunately also very difficult, because the bass radiate Spherically over long distances, what ever suits not the electrostatic. Thus the bass energetically (and thus sonically) not completely out of the role falls, some tricks are needed. PIO sound or Uwe Kempe left here a combination of two subwoofers come up: one in the open, one in the enclosure. An active control of the two the one can be fed also slightly time-delayed. This trick can be to educate themselves in the bass beam legs; the result is a so-called cardioid. The measurements show the effect of this construct right: with increasing frequency, the leg is always eight-shaped – and so exactly corresponds to the behavior of the electrostatic panels. So creates an absolutely harmonious transition.

Limited power in the bass

Limited power in the bass

The figure shows the entire energy distribution of Falcon bass unit on all frequencies and angles. Red stands for particularly intense, black for the opposite. From 0 up to about +/-left in the image the intensity of radiation is 120 degrees (see scale) high. Single, narrow-band bursts like that at 120 Hertz to be added. But the larger the angle and the higher the frequency, the less energy is emitted. In a conventional subwoofer, the diagram would be incidentally almost entirely red or orange in colour.

 

Gallery

PIO Sound Falcon im Test

PIO Sound Falcon im Test

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