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





Electro-Voice SP12 loudspeaker

 

Incorporating all the design advantages of the famous E-V Radax coaxial principle, the E-V Models SP12 (and SP12B) full-range coaxial reproducers include the latest developments in the electro-acoustic art.. Bass response is extended affording, for the first time, pleasing musical balance without the masking effects previously experienced from increased high-frequency reproduction. Tailored to optimum listening requirements, these new developments insure smooth, even coverage of the entire listening area.

 

Eclusive, E-V engineered features include true coaxial mounting of both reproducing elements insuring smooth room coverage, augmented balanced bass response in conjunction with smooth extended high-frequency reproduction. The carefully tailored midrange characteristic provides realism and "presence" at usual sound levels, off setting ear insensitivity at low volume. The exclusive Radax design features a true acoustical crossover in which the mass of the bass cone and its voice-coil coupling compliance is no proportioned as to decouple the woofer above crossover. The Radax unit is free from phasing dips and displays less than 1,4% Total Harmonic Distortion above crossover. The edgewise wound aluminum voice coil design affords 18% more efficiency and consequent damping of transient distortion. An unusually heavy magnet structure is used.

 


Specifications

Frequency Response:  30 - 13,000 Hz

RETMA Sensitivity Rating:  48 dB

Free-Space Cone Resonance:  35 - 45 Hz

Impedance:  16  

Power Handling Capacity

Program :  25 watts

Peak :  50 watts

Critical Damping Factor

In Aristocrat enclosure:  2,0

In an infinite baffle:  1,0

Voice Coil Diameter:  2,5 -inch

Magnet Weight:  3 lb

Mechanical Crossover:  3000 Hz

Dimensions

Diameter :  12-1/4" (7-3/4: d. overall)

Mounting:  11-1/2" diameter (four 1/4" holes equally spaced on circle)

Baffle Opening:  11"

Net Weight:  19 lbs

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