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About the L300 Summit
The JBL L300 Summit, released in 1975, is a high-end 3-way, 3-driver loudspeaker system renowned in the audiophile community for its outstanding sound quality and robust build. It was designed as the home version of the professional JBL 4333 studio monitor. The speaker features a large 38 cm (15 inch) cone type woofer (model 136A) with a ribbed cone made of corn paper for optimal mass and stiffness, driven by a 10.2 cm diameter copper ribbon edgewise wound voice coil and a 5.4 kg Alnico V magnet magnetic circuit, delivering rich and powerful bass. The midrange uses a horn type driver (LE85 and HL92), and the high frequencies are handled by a ring radiator (model 077). The enclosure has an inclined front panel for optimal listening position and is finished in oiled walnut with a smoked glass top surface. The grille fabric was available in multiple colors including blue, black, brown, and camel. Dimensions are approximately 800 x 580 x 570 mm, and the speaker weighs about 66 kg. It has an impedance of 8 ohms, a sensitivity of around 80-93 dB, and can handle 150 watts continuous program power. The crossover frequencies are 800 Hz and 8.5 kHz. The L300 is praised for its sweet highs, smooth midrange, and strong, accurate bass with very little wattage required. It remains a sought-after classic speaker known for its craftsmanship and sound quality.
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