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

Philips EL-7040

This 30 W loudspeaker gives uniform, undistorted sound reproduction over a frequency range of 35 to 10,000 c/s. excellent bass reproduction is obtained owing to the very flexible suspension and centring of the cone. As the air gap is longer than the moving coil, the latter always vibrates in a homogeneous field, thereby excluding sound distortion, even at lerge amplitudes of the cone.

The core of the magnetic system is lined with brass; the eddy currents generated in this brass lining damp the natural resonances of the cone and improve the transient reproduction. Moreover, owing to the brass lining, the impedance in the high-frequency range increases less than with other loudspeakers.
The heavy magnet of Ticonal steel will not be misaligned, even if subjected to violent shocks.
The frame is of die-cast aluminium.
All parts are cadmium-plated or impregnated to avoid corrosion.

Frequency Range:  35 - 10,000 Hz
Power:  30 watts
Dimensions:  12" cone diameter
The loudspeaker is available in two versions:
Type EL 7040/00 :  with matching transformer for 100, 70 and 50 V, impedance 335, 165 and 85 ohms (respectively)

Type EL 7040/01 :  without transformer, impedance 5 ohms.

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