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Pioneer's new High Polymer Molecular transducer technology will alter the course of high fidelity.
There's a significant new development in high fidelity that is destined to play a vital role in sound re production. It is intimately tied in with the piezoelectric principle.
The piezoelectric effect deals with certain crystal devices that flex when voltages are applied to them. Now, Pioneer has discovered a totally new application of the piezo electric effect by applying the principle to ultra-thin aluminum coated high polymer film.
By employing this film as a low-mass diaphragm and applying audio signal voltages, the material expands and contracts uniformly generating acoustic energy. For the first time it becomes possible to transform electrical energy to an accurate acoustical equivalent.
Such thin-film diaphragms properly mounted are capable of reproducing all music frequencies by means of an incredible "breathing" effect.
The ramifications of this unique refinement of the piezoelectric principle are far reaching. Consider such immediate applications as microphones, cartridges, speaker systems and headphones-- in fact, any type of electromechanical transducer requiring resonance-free performance.
There have been many attempts to create sound using diaphragm motion. For example, electrostatic speakers and headphones. But in contrast to the electrostatic principle, the new application of the High Polymer Molecular principle as discovered and perfected by Pioneer, requires no dangerous, high polarizing voltages.
Supporting frame; Suspension; Diaphragm; Voice coil; Yoke. Magnet; signal wires
Fig. 1 Principle of conventional dynamic headphones High polymer thin film diaphragm. Signal wires
Fig. 2 Principle of new Pioneer High Polymer Molecular headphones
The first totally new concept in headphones in over a decade.
Pioneer has successfully incorporated the High Polymer Molecular transducer principle in two new headphones that are unlike any others. Conventionally designed headphones use moving coils, miniature loudspeaker elements and other mechanical parts- as shown in Figure 1- all of which come between you and your music.
Pioneer's new SE-700 and SE-500 headphones don't. They employ a single thin-film high polymer piezoelectric diaphragm that reproduces sound directly, as shown in Figure 2. Only the diaphragm moves air- and moves it accurately, in exact conformance with the electrical signal applied directly to it. The accurate, low-distortion signals available from any standard headphone jack on your receiver or amplifier are directly translated to equally precise, low-distortion sound by the action of the high polymer film diaphragm. Nothing, absolutely nothing comes between you and the original sound.
The value Shown is for informational purposes only: the actual resale price will be set by the individual Pioneer dealer at his option.
Even though you may now own a pair of head phones, you owe it to yourself to hear these new piezoelectric high polymer transducer head phones. In fact, compare them with other types.
You'll find a lower level of distortion-free sound than has ever been achieved- even at unprecedented volume levels. The experience of listening with these new Pioneer headphones is a revelation. In addition, the open-back design, light weight and soft, snug fitting earpieces permit hours of comfortable, private listening.
You'll come away from your Pioneer dealer thoroughly convinced that Pioneer has altered the course of high fidelity.
SE-700, under $80; SE-500, under $50. Both come with a 9 3/4 foot connecting cable, standard phone plug and storage case.
U.S. Pioneer Electronics Corp., 75 Oxford Drive, Moonachie, New Jersey 07074. West: 13300 S. Estrella, Los Angeles 90248; Midwest: 1500 Greenleaf, Elk Grove Village, Ill. 60007; Canada: S.H. Parker Co.
PIONEER when you want something better
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