The JBL family of acoustical lenses was originally designed for stereophonic audio systems for motion picture theater applicatio
![JBL 2390 (2309 and 2310) lenses and horns -- Los Angeles area sale only Photo #2767805 - US Audio Mart JBL 2390 (2309 and 2310) lenses and horns -- Los Angeles area sale only Photo #2767805 - US Audio Mart](https://img.usaudiomart.com/uploads/large/2767805-jbl-2390-2309-and-2310-lenses-and-horns-los-angeles-area-sale-only.jpg)
JBL 2390 (2309 and 2310) lenses and horns -- Los Angeles area sale only Photo #2767805 - US Audio Mart
The JBL family of acoustical lenses was originally designed for stereophonic audio systems for motion picture theater applicatio
![JBL midrange horns with acoustic lenses were popular with custom speaker makers. | Jbl, Horns, Audio design JBL midrange horns with acoustic lenses were popular with custom speaker makers. | Jbl, Horns, Audio design](https://i.pinimg.com/736x/ee/b8/7d/eeb87d1d590fe561b68036a36417b03c--acoustic-horn.jpg)
JBL midrange horns with acoustic lenses were popular with custom speaker makers. | Jbl, Horns, Audio design
![BACCHI-JBL LENTI ACUSTICHE - 2308 - 2312 - 2380 - 2390- 2470 FACSIMILE - #5004339 - su Mercatino Musicale in Casse / Monitor Live Passivi BACCHI-JBL LENTI ACUSTICHE - 2308 - 2312 - 2380 - 2390- 2470 FACSIMILE - #5004339 - su Mercatino Musicale in Casse / Monitor Live Passivi](https://img.mercatinomusicale.com/p_z/39/43/5004339_1484819758.jpg)