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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





Altec Lansing 620B



The Altec 620B Speaker Cabinet is a smartly styled , furniture-type, bassreflex enclosure designed for front mounting a 15'' loe-frequency or two-way coaxial loudspeakers. The 620B provides correct baffling and mounting for quality monitor installations. The cabinet's appearance is enhanced by an appealing, natural, hand-rubbed oil finish on rift-cut oak, and an attractive, snap-on, removable grille assembly.
Architect's and Engineer's Specifications
The speaker cabinet shall be the bass reflex type, and shall provide front mounting for 15'' speakers onl. The cabinet shall meet the following criteria. Grille assembly, snap-on. Grille cloth, brown. Internal volue, 9,0 ft³. Dimensions, 40'' x 26'' x 18'' (HxWxD). Weight, 104 pounds. Finish, handrubbed oil on rift-cut oak.
Specifications
Type: Bass reflex enclosure
Pressure Sensitivity: 100 dB SPL at 4' with Altec 604-8 K loudspeaker when measured on axis with 1 watt input of band-limited pink noise from 100 to 10,000 Hz and calculated to 4' equivalent (Ref.: 0dB = 0,0002 dyne/cm²
Speaker Accommodations: 15'', front-mounted
Internal Volume: 9,0 ft³
Dimensions (W x H x D): 660 x 1016 x 457 mm (26'' x 40'' x 18'')
Weight: 47,2 kg (104 pounds), enclosure only
Finish: Hand-rubbed oil on rift-cut oak. Brown grille cloth
Recommended Altec Speaker: 605B Duplex Loudspeaker

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