Both the interior and exterior have been refreshed and maintained in 2023/6! ATT has been disassembled and cleaned again. The original 4343 by All Alnico, the original 4343 of 4343! The crisp low frequencies and punchy high frequencies are unbearable, and popularity continues unabated even now. The dynamic sound typical of JBL has been revived due to maintenance. It is a famous monitor that can best reproduce the sound source of on-microphone recordings regardless of age or genre (Tomonori Asae)
Maintenance information: 2025.11.22 maintained (ATT disassembly and cleaning, unit removal) 2023.6.1 maintained (exterior gray paint front and rear baffle paint exterior repair plate cleaning gloss adjustment paint horn paint diffuser cleaning/receiving part velcro replacement saran frame painting/magic tape replacement/net replacement, plate pin repair woofer maintenance (edge replacement, corn paper coating, Frame polish) Mid maintenance (edge replacement, cone paper coating, frame polish) driver maintenance (magnetic circuit gap cleaning/center adjustment, sound absorbing material replacement, screw replacement, terminal etc. Contact cleaning) Tweeter maintenance (magnetic circuit gap cleaning/center adjustment, terminal etc. Contact cleaning, exterior paint) Unit detachable terminal rust removal acid wash cleaning, insulation bush & mounting screw replacement ATT brand new Replacement INT/EXT switching SW contact cleaning. A frequency characteristic measurement check (~ 42 kHz) is performed, and the original capacitor is continuously used for good results, input/output waveform and balance confirmation sound output check)
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