意味ない日本産アンプ修理
<iframe width="1280" height="720" src="https://www.youtube.com/embed/LorjPzEAdr0" title="Restoration integrated stereo amplifier DENON // Restore details of each step" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" referrerpolicy="strict-origin-when-cross-origin" allowfullscreen></iframe>