Brush up with internal and external maintenance! JBL's 4311A was developed as a speaker for monitors such as studios. It is a system that I would definitely recommend to customers who listen to jazz/rock with good overall sound tightness and good low frequency. The exterior is finished beautifully. Serial 26444/27900 (Kimiya Miura)
Maintenance information: 2021.8.25 Maintained (exterior repair, full painting. Create a new saran net. Unit cone paper paint Network maintenance (internal connection terminal (Faston) new replacement. ATT replaced for contact cleaning, wiring resoldering, reinstalling and retightening. Perform frequency characteristic measurement check (~ 42 kHz) and continue to use the original capacitor for good results. I/O waveform and balance check, sound output check. (Unit detachment)
Accessories: saran net
Main specifications: 3-way, 3-speaker, bass ref system, bookshelf type use unit/30cm cone type (2213) for low range (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 19kg