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A binding post, colored red, which usually indicates a positive terminal.
A binding post, colored red, which usually indicates a positive terminal.
Two insulated, color-coded binding posts at the bottom center of a historical signal generator; modern devices often have bandwidths exceeding the uti
Two insulated, color-coded binding posts at the bottom center of a historical signal generator; modern devices often have bandwidths exceeding the utility of such connectors
Adapter between five-way binding posts and a male BNC connector
Adapter between five-way binding posts and a male BNC connector
Uninsulated binding posts on a loudspeaker connected to banana plugs
Uninsulated binding posts on a loudspeaker connected to banana plugs
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Kellogg and Rice in 1925 holding the large driver of the first moving-coil cone loudspeaker
Kellogg and Rice in 1925 holding the large driver of the first moving-coil cone loudspeaker
Prototype moving-coil cone loudspeaker by Kellogg and Rice in 1925, with electromagnet pulled back, showing voice coil attached to cone
Prototype moving-coil cone loudspeaker by Kellogg and Rice in 1925, with electromagnet pulled back, showing voice coil attached to cone
The first commercial version of the speaker, sold with the RCA Radiola receiver, had only a 6-inch cone. In 1926 it sold for $250, equivalent to about
The first commercial version of the speaker, sold with the RCA Radiola receiver, had only a 6-inch cone. In 1926 it sold for $250, equivalent to about $3000 today.
A four-way, high fidelity loudspeaker system. Each of the four drivers outputs a different frequency range; the fifth aperture at the bottom is a bass
A four-way, high fidelity loudspeaker system. Each of the four drivers outputs a different frequency range; the fifth aperture at the bottom is a bass reflex port.