From "KORG (Korg)", a manufacturer that produces and sells electronic musical instruments such as synthesizers, digital pianos, and DJ equipment, a futuristic design 12cm full-range speaker released in the 1980s. ・"MM-25" built-in amplifier speaker Power on and sound output confirmed OK Volume: No noticeable scratchiness Equalizer: Normal, no scratchiness Function switch: Each mode normal Guitar distortion: Normal Input: Function and line normal The speakers also sound great without any distortion. There are some internal stains and scratches, please check the photos. I cleaned it as much as possible. This design is still too cool. A rare, hidden gem. Thank you. External dimensions: 190 (W) x 275 (H) x 280 (D) mm Weight: 5kg Power supply: 100V (50/60Hz) Power consumption: 22W (From the manufacturer's catalog information) It has a handle and is easy to carry. Compatible with guitars and keyboards.