JBL L-112 (1980)

A 3-way bookshelf speaker system from JBL’s 1980 consumer lineup, featuring a 30 cm woofer, 13 cm midrange, and 2.5 cm dome tweeter.

Overview

The JBL L-112 is a 3-way, 3-speaker bass reflex bookshelf speaker system released in 1980 by James B. Lansing Sound, Incorporated. It was part of JBL's consumer speaker expansion during the late 1970s and early 1980s, positioned alongside models like the L65 Jubal, L150, and L300 Summit. The system uses a dedicated driver for each frequency band and features continuous level controls for the mid and high ranges.

Specifications

Product type	3-Way, 3-Speaker, Bass reflex system, Bookshelf Type speaker system
Units Used	For Low Band : 30 cm Cone Type (128H); For Middle Range : 13 cm Cone Type (LE5-12); For High Pass : 2.5 cm Dome Type (044)
Allowable input	80W (continuous program); 100W (IEC Standard)
Impedance	8 Ω
Crossover frequency	1.1 kHz, 3.7 kHz
Output sound pressure level	89dB/W/m
Level control	Continuously Variable (Middle Range, High Range)
External dimensions	Width 362x Height 622x Depth 333 mm
Weight	25 kg (when packed)
Original price	¥ 149,000 (1 unit)
Production years	released in 1980

Design

The low-range woofer (128H) uses a unique low-distortion magnetic circuit and a traditional Faraday loop, with cone paper coated in a white coating for optimal mass and rigidity, paired with a large-diameter, precision-machined voice coil. The mid-range unit (LE5-12) features hard cone paper and a 2.2 cm diameter voice coil, mounted in a fully enclosed back cavity to prevent rear interference with the woofer. The high-range tweeter (044) uses a phenol diaphragm with aluminum vapor deposition. The front baffle arranges the drivers in a symmetrical mirror image pair configuration.

Context

The L-112 is part of JBL's consumer lineup from the 1970s and 1980s, developed during a period of expansion that included models like the L65 Jubal, L150, and L300 Summit.