Interior and exterior maintenance have been carried out and brushed up! JBL's 4311A was developed as a speaker for monitors in studios, etc. I would definitely recommend this system to customers who listen to jazz and rock, with its overall sound tightness and cool low frequencies. The exterior is generally clean due to maintenance. Serial 27167/27330 (Tamura Eiji)
Maintenance information: 2023.6.18 Maintained (exterior repair/all paint, new saran net created, woofer cone paper paint, mid/tweeter cone paper coating/urethane ring newly created, network maintenance (internal connection terminal (faston) replacement with a new one. ATT brand new replacement. A frequency characteristic measurement check (~ about 42 kHz) was performed, and the original capacitor was continuously used for good results. (Check input/output waveform and balance, check sound output)
Accessories: saran net
Main specifications: 3 way, 3 speaker, bass reflex system, bookshelf type, frequency characteristics 45 Hz to 15 kHz, allowable input 40 W (RMS), 8 ohms, crossover frequency 1.5 kHz, 6 kHz, output sound pressure level 91 dB, dimensions W362 x H597 x D298 mm, weight 19 kg
Both the interior and exterior have been maintained! Middle monitor gray finish specification. The network capacitor remains original. A model that has a punch, and a good middle tone of sharp and nuke are very attractive. JAZE is fascinating to hear with a chunky mid and low range sound that contrasts with modern JBL. The exterior is finished in a beautiful exterior repair (Shota Sasaki)
Maintenance information: 2021.9.27 Maintained (network internal connection terminal (Faston) new replacement. ATT new replacement 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. Exterior repair/full painting (Create a new saran net)
Accessories: None
Main specifications: 3way3 speakers Front bass Refer type Sound pressure level 91dB Impedance 8Ω Crossover frequency 1.5kHz/6kHz Playback frequency band 45-15,000 Hz Dimensions W362×H597×D298mm 20kg/1
Refresh with internal and external maintenance! Middle monitor gray finish specification. The bass with a punch, and a good middle tone of sharp and nuke are white eyebrows. The jazzi you hear on this speaker is fascinating. Serial 15869 15938 (Atsushi Takasaki)
Maintenance information: 2021.9.13 sound confirmed
2019.4.27Maintenance completed ([Exterior] Exterior repair, all painting
New Saran Net, Woofer Cone Paper Coating, Terminal Cleaning [Mid Maintenance] Center Cap Dent Repair, One Side Magnetic Circuit Gap Cleaning Center Adjustment [Tweeter Maintenance] Cleaning in the magnetic circuit gap, center adjustment, center cap recess repair [Network maintenance] Internal connection faston terminal replacement, ATT exchange, frequency characteristic measurement check ~ about 42kHz (Continued use of original capacitor for good quality, input and output waveform and balance check, sound output check)
Accessories: saran net
Main specifications: 3way3 speaker Front bass Refer type Sound pressure level 91dB Impedance 8Ω Crossover frequency 1.5kHz/6kHz Playback frequency band 45~15,000Hz W362 ×H597×D298mm 20kg/book