Everything from exterior repairs to every corner of the unit etc. has been fully maintained in 2023. All Alnico 4343WX. Among the series, it is a model with a good punch and a lot of noise. Serial 1547115466 (Murakoshi Yoichi) is hugely popular even today as a model that is easy to drive and handle in the low range
Maintenance information: 2023.4.24 Maintained (exterior repair/polishing/oil finish. Front and rear baffle paint Saran net replacement, frame repair Woofer maintenance (edge replacement, corn paper coating) midmaintenance (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 (terminal rust removal, acid cleaning, insulation bush & mounting screws) exchange. ATT replacement with a brand new one. INT/EXT switching SW contact polish and clean. Tweeter resistor replacement. A frequency characteristic measurement check (~ 42 kHz) was performed, and the HF 1.0 mH coil, which had misalignment, was replaced on both the left and right, and the results were excellent, so the original capacitor was continued to be used. (Input/output waveform and balance check, sound output check)
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