What is stereo?

There are now two system of high fidelity, monophonic (monaural) and stereophonic. Monophonic is a system that starts from one microphone and is fed through a single high fidelity set. Stereophonic is a double system. Two separate microphones are placed at different sides of the orchestra and two different systems are used to keep the two signals or channels separated. Two separate speakers are used, placed on different sides of you room. Stereo is much like 3-D photography, two slightly different sound reach your ears giving you a new dimension in sound.

H.H. Scott '59

AKG K 280 Parabolic

 AKG sets a new standard in headphones technology.  An  "acoustic lens"  provides a new level of sound quality. Each channel uses two transducers whose diaphragms form tangent planes to a paraboloid as shown.
 This arrangement Focuses the sound waves at the entrance of the ear canal just like satellite dishes or spotlights focus radio waves or light.
  CAD methods have been employed to get the best out of the interference patterns created by more than one sound source radiating the same signal. The transient response of the K 280 parabolic has  been optimized using the Wigner distribution  (a mathematical model of sound) so high levels are no problem. This open-air design, being generously ventilated, conveys a sense of space and clarity of sound.
Type:  Dynamic
Rated SPL:  94 dB
Power Handling Capability:  200 mW
Frequency Range:  20 - 20,000 Hz
Rated Impedance:  75 Ω/system
Earphone Pressure:  3. N (approx. 350 g)
Weight:  250 g (8,8 oz) without cable
Cable:  Single cord length; 3 m

Connector:  ¼" stereo jack plug

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