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JBL Metregon Stereo Speaker Cabinet - $4,500 (West Springfield)
Christopher Terrace
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The JBL Metregon (1960) is the first speaker system to offer full-field stereo reproduction in an enclosure of moderate size. Two completely separate full-range speaker systems are housed in the Metregon. Sound from these two sets of speakers is integrated by the curved refractor panel, making use of the same acoustic principles as the JBL Ranger Paragon. The result is a full-dimensional sound stage six feet wide. There is no "hole in the middle", no "split soloist", to mar the illusion of a real performance.
Like the Paragon, the JBL Metregon projects perfectly balanced stereophonic sound to every listener in the room, regardless of seating position. Like the Paragon, it also performs superbly as a monaural reproducing system.
The curved refractor panel used exclusively in JBL integrated stereo systems integrates the two separate stereo channels into a single three-dimensional sound source. It not only produces a smooth transition from one source of sound to the other, but disperses the sound pattern over a wide area.
The two separate full-range speaker systems housed in the Metregon face into the edges of the refractor panel. Sound generated by these speakers tends to flow along the curved surface of the panel. It is projected outward from the refractor by a complicated interplay of reflection and constructive interference. The listener hears sound directly from the loudspeakers as it is projected across the full width of the curved acoustic refractor. Individual instruments are pinpointed at the position they were recorded. The effect is comparable to dimensions achieved when a moving picture is projected on a wide curved screen.
Since the JBL Metregon generates a stereophonic sound field within the loudspeaker system itself, there is no need to sit in a particular location to hear three-dimensional sound. Every listener in the room hears a single blended performance, just as if the artist were actually in the room.
Loudspeaker Components used in the JBL Metregon
The Metregon reproducer is designed especially to match the JBl 205 loudspeaker system. This consist of two matched sets of components. Each set includes a JBL 130A low frequency driver, model 275 high frequency driver, H5040 cast exponential horn, and N600 crossover network. The bass driver are loaded by individual matched-reflex chambers. A low crossover frequency of 600 Hz enables the radiant dispersion principle to be utilized to best possible advantage.
Cabinet is Mid Century Modern with Teak wood
Components Specifications
JBL 130A - Maximum efficiency low frequency loudspeakers designed primarily for use with the 175 DLH high frequency assembly. The 130A have 4" edgewound copper ribbon voice coil and long magnetic gaps for crisp reproduction of bass tones. Normally,a single 130A is used together with the 175DLH and N1200 dividing network, in larger enclosures where two bass drivers can be installed. For reflex or horn-loaded enclosures.
Impedance: 16 ohms
Power Capacity: 25 watts
Free Air Cone Resonance: 29 cps
Frame: Rigid cast aluminum
Field: Permanent Alnico V Magnet
Magnetic assembly: 11,5 lbs
Weight: 23 lbs (shipping)