L112

About the L112

The JBL L112 is a 3-way, 3-driver bookshelf loudspeaker system produced from 1978 to 1983, designed for high-fidelity audio with a focus on rock and roll music but versatile for all genres. It features a 300 mm (12 inch) low-frequency cone woofer (model 128H) with a white aquaplas coating and symmetrical field geometry for low distortion, a 130 mm midrange cone driver (LE5/12), and a 25 mm dome tweeter (type 044) with a phenol diaphragm and aluminum vapor deposition for smooth high-frequency reproduction. The system uses a high-resolution dividing network with crossover frequencies at 1100 Hz and 3700 Hz, providing superior transient response and a stable, accurate stereo image through mirror-imaged stereo pairs. The enclosure is made of dense compressed wood with an oiled walnut finish, measuring 622 x 362 x 333 mm and weighing 25 kg. It has an impedance of 8 ohms, sensitivity of 89 dB, and is recommended for amplifiers from 10 to 300 watts. The L112 is highly regarded for its robust build, excellent sound quality, and remains sought after as a vintage speaker, often selling between and in good condition. The woofer surrounds typically require replacement every 10-15 years due to foam degradation. The speaker includes level controls for mid and high frequencies hidden behind the grille for room tuning.