Both the interior and exterior have been fully maintained and brushed up! This is an original 4502 enclosure. The sense of energy that comes close in front of you, and the dynamic, and dynamic sound quality is truly JBL. You can enjoy lots of dynamic sounds. The finish is beautiful due to exterior maintenance. Serial 13810, 13843 (Fujisawa Yukishi)
Maintenance information: 2026.3.12 Maintained (exterior repair/full painting. Saran net replacement/frame repair. Woofer maintenance: edge/damper replacement, magnetic circuit rust removal/gap cleaning/center adjustment, cone paper coating, terminal cleaning/screw replacement. Driver maintenance: Magnetic circuit gap cleaning center adjustment, sound absorbing material replacement, terminal cleaning/screw replacement. Network maintenance: frequency characteristic check, ATT cleaning, terminal cleaning, screw replacement. (Defuser repair)
Accessories: saran net, diffuser
Main specifications: Unit configuration 2215B, 2420+2391, 3110 crossover 800 Hz W610 x H770 x D520 mm, weight approx. 40 kg/book
3-system cross selector for power amplifiers and speakers using high quality parts. The changeover switch uses silver-plated contacts to convey the original sound quality as it is. You can switch and select up to 3 pairs of speakers from the 3 power amplifier outputs. Alternatively, as a speaker selector, you can switch and select up to 6 pairs of speakers from one power amplifier output. The exterior is generally good, although there is one spot scratch on the top plate (Yamato Yuki)
Maintenance information: 2026.3.11 continuity confirmed
Accessories: instruction manual
Main specifications: 3 inputs/3 output systems, or 1 input/6 output systems, 250W (8Ω) silver-plated contacts, mechanical (rotary) switch, non-shorting switching, simultaneous bipolar switching W430 x D142 x H64 mm 3.7 kg
The famous C-2 has 43 capacitors replaced, and all selectors, switches, and volumes have been disassembled and polished! It has a particularly good reputation for phono, and it is still a popular model among analog users. With a natural and highly transparent Yamaha sound, you can fully enjoy the appeal of acoustic instruments, such as the touch and feel of a piano, and the sharpness of guitar strings. The exterior has a feeling of use appropriate for the model year, such as multiple line scratches and bumps on the top plate. Serial 14711 (Yamato Yuki)
Maintenance information: 2025.8.5 Maintained (noise at all inputs: disassembled and cleaned due to poor contact with the input selector. Electrolytic capacitor replacement. Disassemble and clean the volume, each selector, and switch. Panel, terminal, and housing cleaning. Symptoms not indicated: The power lamp flashes, abnormal noise from the power switch → power switch, surge absorber replaced. Poor sound quality during phono MC input → input terminal MC signal GND line correction)
Accessories: copy of instruction manual
Main specifications: PHONO x 3 system (MM/ MC) MC head amplifier built-in W435 x H72 x D320 mm 7.9 kg
The classic model for professional 1" screwdrivers. It is installed in many of the company's 43 series, etc., and it is a driver that is easy to balance even when combined with various woofers and tweeters. There are small scratches, paint peeling, and there is small corrosion on some parts of the diaphragm (Oikawa Tetsuji)
Maintenance information: 2026.1.29 Operation confirmed
2012.8.11 Maintained (magnetic circuit overhaul, operation adjustment, replacement of sound absorbing urethane material)
Accessories: none
Main specifications: 1 inch driver, throat diameter: 25 mm, 16 ohms (measured 10/12 ohms), 118 dB, frequency characteristics, 800 Hz to 20 kHz, crossover frequency: 500 Hz or more, 5.1 kg
In addition to internal maintenance such as driver magnetic circuit gap cleaning, ATT disassembly and cleaning, etc., a new saran net has been manufactured, and all exterior paint has been completely overhauled! The original 4343 by All Alnico, the original 4343 of 4343! It is a speaker representing JBL, where the crisp low frequencies and punchy high frequencies are unbearable. Our maintenance brought back the dynamic sound typical of JBL! This is a monitor speaker that can play back the best when it comes to on-mic recording sound sources (Daiki Goto)
Maintenance information: 2026.1.15 Maintained (exterior repair/gray paint
Front and rear baffle repair/painting, new saran net created. Woofer maintenance: edge replacement/cone paper coating, terminal cleaning/screw replacement. Midmaintenance: edge replacement/cone paper coating, frame polishing, terminal cleaning/screw replacement. Driver maintenance: Magnetic circuit gap cleaning center adjustment, sound absorbing material replacement, terminal cleaning/screw replacement. Tweeter maintenance: magnetic circuit gap cleaning, terminal cleaning/screw replacement. Network maintenance: frequency characteristic check/switching SW/ATT cleaning, terminal cleaning/screw replacement. (Detachable unit)
Accessories: none
Main specifications: 4-way 4-speaker bass reflex type 2405/2420/2121/2231A crossover 300Hz/1250Hz/9500Hz 8Ω 93dB W635 x H1,051 x D435 mm 83.9 kg/book
※1 piece only. Insulators using special rubber with excellent anti-vibration properties. Hannenite is used to effectively absorb unwanted vibrations. There is dullness and a feeling of use (Oikawa Tetsuji)
Accessories: none
Main specifications: load capacity approx. 20 kg per piece, diameter 36 x H9.5 mm, weight 9 g/piece