Everything from exterior painting to driver gap cleaning has been refreshed and maintained with attention to detail! 4343 original unit, 4343GY by All Alnico! A famous machine that clearly expresses a rich low-frequency sound and a sense of depth, and continues to be popular even now. The dynamic sound typical of JBL has been revived due to maintenance. It is a famous monitor that can best reproduce sound sources recorded with on-microphone regardless of age or genre. Serial 14004/14414 (Takasaki Atsushi)
Maintenance information: 2023.4.17 Maintained (exterior repair/gray paint,
Front and rear baffle repair/coating, saran net replacement, frame repair, woofer maintenance (edge replacement, cone paper coating), mid maintenance (edge replacement, cone paper coating), driver maintenance (magnetic circuit rust removal/gap cleaning/center adjustment, sound absorbing material replacement, terminal contact cleaning), tweeter maintenance (horn disassembly cleaning, magnetic circuit rust removal/gap cleaning, terminal contact cleaning), Network maintenance (damaged terminal (x1) replaced from stock parts. Terminal rust removal, pickling, insulation bush & mounting screw replacement. There is evidence that the ATT was replaced by the user, but the round ATT was replaced with a new one with a square ATT with high power, the large ATT was disassembled and cleaned, contact grease was applied, and the wiring was re-soldered. INT/EXT switch-over SW contact cleaning A frequency characteristic measurement check (~ 42 kHz) was performed, and the original capacitor was continuously used because the results were good. Check input/output waveform and balance, check sound output), detach the unit)
Accessories: saran net, diffuser
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
Refresh yourself with interior and exterior maintenance! A gray-finish model of the king monitor 4343B. The balance between thick, strong mids and responsive bass is perfect. A model that wants to make jazz and rock sound thick, thick, and powerful. It's a lot of exhilarating noises. The exterior has been beautifully finished due to maintenance (Tomoho Asaine)
Maintenance information: 2024.5.27 Maintained (exterior repair/all coated saran frame processing correction repair/net replacement, plate maintenance repair, plate maintenance (edge replacement, cone paper coating, center cap replacement)) midmaintenance (edge replacement, cone paper coating, center cap replacement, driver maintenance (magnetic circuit rust removal/gap cleaning/center adjustment, sound absorbing material replacement, terminal cleaning/screw replacement) Tweeter maintenance (magnetic circuit rust removal/gap cleaning, terminal cleaning/screw replacement, exterior painting) horn painting, diffuser repair/painting, baffle plate cleaning unit detachable network maintenance: frequency characteristic check, ATT cleaning, switching SW/terminal cleaning/screw replacement)
Accessories: diffuser saran net
Main specifications: 4 way 4 speaker bass reflex crossover 300 Hz/1,250 Hz/9,500 Hz impedance 8 Ω 93 dB dimensions W635 x H1,051 x D435 mm weight 83.9 kg/1
Full maintenance from each unit to network and exterior! This is a 4343BWX with blue baffles and walnut specifications. The instantaneous power, sharp treble, volume and dynamism of the bass are outstanding. It's one step ahead of current speakers in terms of localization, but it's rare to find a speaker that makes on-mic recordings of all ages sound better than this. It has a beautiful finish due to exterior maintenance (Oikawa Tetsuji)
Maintenance information: 2024.5.27 Maintained (exterior repair/polishing/oil finish baffle repair/paint saran net repair/frame repair: edge replacement, cone paper coating, in-gap cleaning/center adjustment midmaintenance: edge replacement/cone paper coating driver maintenance: magnetic circuit rust removal/gap cleaning/center adjustment, sound absorbing material replacement, terminal cleaning/screw replacement Tweeter maintenance: magnetic circuit rust removal/gap cleaning, terminal cleaning/screw replacement network maintenance: frequency characteristic check, ATT/switching SW cleaning, partial defective resistance/capacitor replacement unit detachment/diffuser repair)
Accessories: none
Main specifications: 4-way monitor speaker bass reflex playback frequency band 35 Hz to 20 kHz (+- 3 dB) crossover frequency 300 Hz/1250 Hz/9500 Hz impedance 8 Ω output sound pressure level 93 dB dimensions W635 x H1,051 x D435 mm weight 83.9 kg
The price has been reduced. 2024/2/14 sales price 99,800 yen Maintenance completed! A preamplifier that can be operated by a full remote control. A familiar quad tone that is natural, easy to listen to and won't get tired of. In addition to volume, left and right balance, input switching, etc., it is fully equipped with functions such as TILT (loudness like function), high pass, low pass filter (2 levels each), etc. (Oikawa Tetsuji)
Maintenance information: 2024.1.16 Maintained (NG diode disconnected due to fuse in the main unit → short circuit in the remote control wired cord connector section → replacement, operation check)
Accessories: remote control, power cable
Main specifications: full remote control control amplifier with PHONO input (mm) W321 x H80 x D255 mm 3.3 kg
2022.9.10 This is the first 607 model that has undergone full maintenance, such as replacing capacitors, transistors, and SP terminals! It's one that makes you feel the intricacies unique to the heyday of audio. You can feel the strength of extrusion in the low range when playing LP records and the dynamic sense of dynamism with an intonation in the middle range, which is unique to the golden age of SANSUI. The exterior has dullness and small scratches. Serial 227050109 (Yonejima Satoshi)
Maintenance information: 2022.9.10 Maintained (electrolytic/tantalum capacitors, transistors, SP terminal replacement, RCA terminal polishing. Board cleaning and re-soldering. SW/VR disassembly and cleaning, application of grease to prevent oxidation and sulfation, replacement of tantalum capacitors, electrolytic capacitors, transistors, and heat dissipation sheets in the EQ/TONE section. Semi-fixed resistor, cement resistor, fuse resistor, fuse, relay replacement. Input waveform confirmation, load test (1kHz sine wave, 8Ω load: 65W+65W OK) sound output test)
Accessories: copy of instruction manual
Main specifications: 65W+65W (8Ω) W430 × H168 × D389 mm 15.3 kg
Maintained! Although it is a transistor amplifier, it has a warm sound like a vacuum tube with a faint scent. While it is glossy, it is also strong, so you can use it with any speaker. Exterior, dullness, scuff marks, rust, corrosion, etc. can be seen (Kobayashi Hitoshi)
Maintenance information: 2024.5.25 Maintained (main amplifier circuit fault repair fuse replacement. Switch and volume affinity correction)
Accessories: none
Main specifications: 80W+80W (8Ω) W466 x H181 x D378 mm 15 kg
It has been refreshed and maintained to brush up by replacing block capacitors, etc.! Kit version of the masterpiece model 7. The parts that can be obtained at the beginning of sale remain the original, and those that are missing use similar parts, and it is a 25th anniversary model that appeared with almost the same structure as the original. As a vacuum tube preamp, you can hear a slightly different tone from other models. There are line scratches on the wood case on the exterior. Serial F030105 (Murakoshi Yoichi)
Maintenance information: 2024.5.9 maintenance (main volume disassembly cleaning repair, selector disassembly contact strengthening repair, block capacitor, fuse holder cap replacement, short pin addition, vacuum tube socket and RCA jack re-caulking repair. Operation has been checked with AC100V) In order to bring the volume curve closer to the original, the OUT LEVEL on the back is narrowed down. 2018.7.15 Maintained (vacuum tubes 12AX7 x 2 replaced, oil capacitors 0.47 μF replaced with BlackBeauty, replaced with 0.33 μF x 2 film capacitors. RCA jack earth reinforcement and caulk repair. Vacuum tube socket caulk repair. Other operations have been checked)
Accessories: none
Main specifications: kit model 12AX7 × 6 W453 × H185 × D260 mm 7.9 kg
Maintained! A power amplifier with a separate name for the main part of the SQ38F series. The natural, smooth sound quality with a high sense of transparency is attractive. You can relax and enjoy classical music and vocals in a natural way. The deep sound quality that cannot be expressed with the latest vacuum tube amplifiers is exceptional. There is a slight feeling of use (Murakoshi Yoichi)
Maintenance information: 2024.5.29 maintenance (vacuum tube sockets, block capacitors, electrolytic capacitors, oil capacitors, SP and RCA terminals, semi-fixed VR, fuse holder replacement. SW/VOL disassembly contacts are re-polished, and grease is applied to prevent oxidation and sulfidation. Input/output waveform confirmation, load test (8Ω load 1kHz 30W/30W), input/output waveform confirmation, sound output check performed.)
Accessories: instruction manual (copy)
Main specifications: output 30W+30W dimensions W410 x H160 x D205 mm weight 13.8 kg
Fully maintained! The main part of the SQ38F is an independent power amplifier, the famous MQ60. The natural, smooth sound quality with a high sense of transparency is attractive. You can relax and enjoy classical music and vocals in a natural way. The deep sound quality that cannot be expressed with the latest vacuum tube amplifiers is exceptional. The exterior has dullness, small scratches, and paint peeling. Serial 473753 (Hiroki Aso)
Maintenance information: 2024.5.19 maintained (vacuum tube socket block capacitor electrolytic capacitor oil capacitor SP and RCA terminal semi-fixed VR fuse holder replacement load test (8Ω load 1kHz 30W/30W) input/output waveform confirmation sound output check performed impedance switching SW gain VOL disassembly contact refinement oxidation and sulfidation prevention grease coating input/output waveform confirmation load test (1 kHz) (Sine wave at 8Ω load: 30W+30W) sound output test)
Accessories: copy of instruction manual
Main specifications: output 30W+30W dimensions W410 x H160 x D205 mm weight 13.8 kg
Maintained in 2023. After all, the warm, and glossy sound quality is excellent for stringed instruments. It has a soft and vivid sound not found in transistors, making it perfect for listening for long periods of time. In addition to noticeable scuffs and paint peeling on the exterior and transformer area, dullness and a feeling of use can be seen. Serial F0800283 (Murakoshi Yoichi)
Maintenance information: 2023.7.23 maintained (vacuum tube socket block capacitor electrolytic capacitor oil capacitor SP and RCA terminal semi-fixed VR fuse holder replacement load test (8Ω load 1kHz 25W+25W) input/output waveform confirmation sound output check performed gain VOL NFB switching SW disassembly contact refinement to prevent oxidation and sulfation grease coating input/output waveform confirmation distortion load test (1 kHz (25W+25W at sine wave 8Ω load) sound output test)
Accessories: copy of instruction manual
Main specifications: 50CA10 push-pull output 30W+30W W410 x H183 x H160 mm 13.8 kg
The disposal price has been reduced! (Member discounts are not applicable) 2023/5/9 sales price 198,000 yen Maintained! This power amplifier was released around the same time as the SG620. It combines 100W+100W driving power with good sharpness. It reproduces thick sounds unique to JBL from a simple design with only a power switch on a black body. It goes well with 70' SJBL speakers and drives exhilarating. The exterior has front scratches, bends on the power switch, scratches, and repair marks on the top plate. Serial 10623 (Yamato Yuki)
Maintenance information: 2024.3.2 Maintained (timer relay installed (speaker will be turned on 5 seconds after power is turned on. (Please turn off the VOL when the power is on). Power SW bending correction (deformation of the knob itself is not compatible). Power stage Tr check. (Replacement of Tr in the board, level VOL, fuse holder, and C in the power supply board)
Accessories: power cable
Main specifications: T-type circuit adopted 100W+100W W432 ✕ H132 ✕ D355mm 19kg