Refresh yourself 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 due to the good overall tightness of the sound and the low frequencies with good omission. The exterior is beautifully finished. Serial 28461 28770 (Nobuyuki Takahashi)
Maintenance information: 2022.6.30 Maintained (exterior repair/all painting saran frame reinforcement/painting/net replacement all units cone paper painting/frame polishing ATT cleaning/knob repair (Unit detachment/terminal replacement with a new one)
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 characteristic 45Hz to 15kHz Allowable input 40W (RMS) 8Ω Crossover frequency 1.5kHz, 6kHz Output sound pressure level 91dB W362×H597×D298mm 1 bottle 19 kg per