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 due to the good overall tightness of the sound and the low frequencies with good omission. The condition is clean due to exterior maintenance. Serial 17062A 16956A (Nobuyuki Takahashi)
Maintenance information: 2022.9.1 Maintained (internal connection terminal (faston) new replacement (other than input). Open the back cover of the ATT and apply contact grease to the contacts. Frequency characteristic measurement check (~ about 42kHz) is performed, and the original capacitor is continued to be used for good results. (Check input/output waveform and balance, sound output check.) (Exterior full paint exterior gap/chip repair Saran frame reinforcement/painting/net replacement All units cone paper painting/frame polishing Woofer maintenance (edge dump agent application, center cap crack repair on one side ) Tweeter maintenance (center cap dent correction on one side, internal cleaning) 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 × D298 mm Weight 19kg