and open choices of C-MARK Series digital mini amplifier, powered by built-in integrative digital power amplifier Features1. Plug & play, user-friendly, ... clear indication, easy manipulating for nonprofessionals.2. The digital power amplifier features best sound, high efficiency and high reliability ... 155 * 57 mmContact person: Fancy Zhang Cell: 0086 13425157873 GA500 mini digital amplifier