Brush up with internal and external maintenance! JBL's 4311A was developed as a monitor speaker for studios, etc. It is a system that I would definitely recommend to customers who listen to jazz/rock with good overall sound tightness and good low frequencies. Some of the lettering on the exterior has disappeared, but it is generally clean. Serial 26444 27900 (Yamato Yuki)
Maintenance information: 2022.3.14 operation confirmed
2021.8.25 Maintained (exterior repair/all painting. Create a new saran net. Unit cone paper coating Network maintenance (internal connection terminal (FASTON) new replacement. Contact cleaning, wiring re-solder, re-install and re-tighten for ATT replacement Frequency characteristic measurement check (~ approx. 42 kHz) is performed and the original capacitor is continued to be used for good results. Check input/output waveform, balance, and sound output. (Unit detachment)
Accessories: Saran net
Main specifications: 3-way, 3-speaker, bass reflex system, bookshelf type use unit/30cm cone type for low frequency (2213) /13cm cone type for middle range (LE5-2) /3.6cm cone type for high range ( LE25) Frequency Characteristics 45Hz to 15kHz Allowable Input 40W (RMS) 8Ω Crossover Frequency 1.5kHz, 6kHz Output Sound Pressure Level 91dB Dimensions W362×H597×D298mm Weight 19 kg