I went to Hi-Fi Do Akihabara shop by bicycle. I caught sight of Victor SX3 at shop. It looked good and the price was reasonable. I decided to buy it.
I was longing to get SX3 speaker for a long time because I heard from a friend that SX3 can make a good sound by installing to baffle board after reforming network. I connected woofer with tweeter 6dB, and then I installed oil condenser 10 micro and film condenser 3.3 micro.
I cut a back of speaker box off, and then I removed one side of it. By doing so, the sound was closed to natural.