We also sell on sites other than Mercari and our own website, so please refrain from immediate purchase and confirm availability via comments. Tokyo Sound Box, a specialist in unit-type soundproof rooms. Yamaha Avitex Sefine NS (1.5 tatami mats / -35db) This compact yet high-performance soundproof room is perfect for musical instrument practice, DTM, streaming, and working from home. ■ Model Number AMDB15H ■ Size Exterior: 1443 (with ventilation fan +170) x 1884 x 2069mm Interior: 1325 x 1766 x 1964mm ■ Soundproofing Performance -35db ■ Condition There are minor scratches and signs of use commensurate with its age, but the soundproofing performance and functionality are not affected, and you can use it with confidence for a long time. ■ Delivery and Installation ・Basic installation fee: 68,000 yen (tax included) ・Additional fees may apply depending on the region, stair work, air conditioning work, and piano/desk transport. ・Door/ventilation fan positions can be adjusted during installation. We will construct it optimally to suit your room. ■ Soundproofing Enhancement and Renewal Support We offer specialized options such as vibration isolation reinforcement for the floor, sound absorption reinforcement, soundproofing measures for windows, ventilation, and air conditioning, and replacement of included equipment (carpet, lighting, ventilation fan) with new ones. ■ For those considering purchase and installation The optimal content and cost vary depending on the installation environment and your intended use, so we recommend consulting with us first via our official website or official LINE. (URLs cannot be posted due to regulations, so please search for "Tokyo Sound Box") 【Please inform us when contacting us】 1. Your installation location address 2. Floor number and elevator availability 3. Air conditioning work / piano/desk transport availability We, a soundproof room specialist, will provide consistent support from pre-consultation to installation. Tokyo Sound Box Co., Ltd. Representative: Fumiya Sato ※Instagram / note / YouTube updates in progress