Maintenance was completed in 2020, but there is a slight gap left on the ATT on one side. ALTEC's crossover variable frequency network. The graininess and sound cuts are also impressive. With this network, you can easily switch horns and drivers in various ways. There are stains and scuff marks on the exterior. Serial K340599/K340611 (Sasaki Shota)
Maintenance information: 2020.7.19 Maintained (rust removal (pickling) treatment for back terminal screws and bridge plates, front terminal orientation correction, increase, deadline change, SW contact cleaning, ATT disassembly, contact grease application, frequency characteristic measurement check (~ approx. 42 kHz), and continue to use the original capacitor for good results, input/output waveform and balance confirmation sound output check)
Main specifications: Crossover 500 Hz, 800 Hz, 1200 Hz switched with a jumper, banana plug input compatible W191 x H110 x D350 1.8 kg/bottle