The exterior has been completely refreshed, and each unit was overhauled in 2017. 4343 original unit, 4343GY by All Alnico! A famous machine that clearly expresses a rich low-frequency sound and a sense of depth, and continues to be popular even now. The dynamic sound typical of JBL has been revived due to maintenance. It is a famous monitor that can best reproduce sound sources recorded with on-microphone regardless of age or genre. Serial 12899/12911 (Tamura Eiji)
Maintenance information: 2025.4.5 Maintained (exterior repair/gray paint. Front and rear baffle repair and painting. Unit detachment) 2023.6.15 maintenance (exterior maintenance (repair/cleaning, top plate repainting, diffuser velcro replacement) saran net replacement/frame repair.) 2017.9.13 Maintained (woofer and mid-unit edge replacement, corn paper paint, rim polish. Cleaning inside the screwdriver slit, center adjustment. Sound-absorbing material replacement, screw replacement, contact cleaning. Tweeter disassembly, cleaning, and touch repair. Network terminal rust removal and cleaning. Replace insulating bushings and mounting screws. ATT exchange. INT/EXT switch-over SW cleaning. Check the input/output waveform and balance, and check the sound output. Frequency characteristics were measured, and since they are good, the capacitors are used as they were. Exterior corner chipped putty repair, front and rear baffle painting. Saran net replacement. Saran frame repair)
Accessories: saran net, diffuser
Main specifications: 4 way 4 speaker bass reflex type 2405/2420/2121/2231A crossover 300Hz/1250Hz/9500Hz 8Ω 93dB W635 x H1,051 x D435 mm 83.9 kg/book