Pioneer Headphones SE-500 SE-700 Elk Grove Village IL Print Ad 1975 For Sale

Pioneer Headphones SE-500 SE-700 Elk Grove Village IL Print Ad 1975

Pioneer\'s new High Polymer Molecular transducer technology will alter the course of high fidelity.

There\'s a significant new development in high fidel-ity that is destined to play a vital role in sound re-production. It is intimately tied in with the piezoelec-tric principle.

The piezoelectric ef-fect 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 reproduc-ing all music frequencies by means of an incredible \"breathing\" effect. The ramifications of this unique refinement of the piezoelectric principle are far reaching. Con-sider such immediate applica-tions as microphones, cartridges, speaker systems and headphones -in fact, any type of electrome-chanical transducer requiring res-onance-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 prin ciple, the new application of the High Polymer Molecular principle as discovered and perfected by Pioneer, requires no dangerous, high polarizing voltages.

The value shown is for informational purposes onty, the actual resale price will be set by Individual aption.

Supporting frame-

Suspension

Yoke

Diaphragm

Voice coil

High polymer thin film diaphragm

Magnet

Signal wires

Fig. 1 Principle of conventional dynamic headphones

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 incor-porated the High Polymer Molecu-lar 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 pie zoelectric diaphragm that repro-duces sound directly, as shown in Figure 2. Only the diaphragm moves air and moves it accu-rately, in exact conformance with the electrical signal ap-plied directly to it. The accurate, low-distortion signals available from any standard headphone jack on your receiver or ampli-fier 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.

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 un-precedented volume levels. The experience of listening with these new Pioneer headphones is a revela-tion. 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 94 foot connecting cable, standard phone plug and storage case.

U.S. Pioneer Electronics Corp., 75 Oxford Drive, Moonachie, New Jersey 07074. West: 13300 S. Es-trella, Los Angeles 90248/ Mid-west: 1500 Greenleaf, Elk Grove Village, III. 60007 / Canada: S.H. Parker Co.

SE-500

SE-700

PIONEER

when you want something better