It's an ONKYO super grade subwoofer. This item was created by combining ONKYO technology at the time in order to maximize performance in high-end theaters. Two 25cm cone-shaped woofers are used, and the sound is quite punchy and heavy. There is appearance, dullness, abrasions, and a feeling of use (Kobayashi Hitoshi)
Maintenance Information: 2022.10.16 Operation confirmed
Accessories: instruction manual, remote control
Main specifications: subwoofer with built-in amplifier maximum output 130W playback frequency range 15Hz to 80Hz power consumption 81W W501 x H597 x D467mm 44.8 kg