【BOSS KM-400 / Vintage Keyboard Mixer】Simple operation confirmed, no scratchiness Thank you for viewing. This is the BOSS "KM-400" keyboard mixer, a legendary BOSS product. Because it has been a long time since its release, there are corresponding scratches and scuffs on the exterior, but simple operation has been confirmed, and there is no scratchiness in each channel. It is in good condition for a vintage piece of equipment. ■ Product Appeal Thick, warm sound unique to BOSS analog: Sound quality with "roundness" and "presence" that cannot be obtained with current digital mixers. Simple and intuitive 4-channel configuration: Ideal for combining multiple pieces of equipment such as synthesizers, rhythm machines, and modular synthesizers. Easy to use for both home recording and live performances: Compact size with sufficient operability. The KM series is a popular vintage line overseas: A model with high collection value and demand regardless of condition. ■ Condition Scratches and scuffs appropriate for the age Simple operation confirmed (no scratchiness) Please check the appearance in the photos. Please purchase only if you understand that this is a used item. ■ Shipping ・Carefully packed and shipped ・Anonymous shipping supported