DDA-20 is an electric drum amplifier developed based on the sound characteristics of electronic drums.

Unique-Design for Electronic Drums - Use for Electric Drum practice, street performance, karaoke with friends, band performance, outdoors playing. Frequency response ranges from 20 to 20KHZ.Musical instrument input which can be connected to 'electronic drum', 'keyboard', etc.

Used once on stage, excellent condition. Came with instruction, no original box. 

Thank you for looking.