... <0.5ms Frequency response: 20-20Khz 2.1 speaker system with amplifier1. Classic again, MDF & aluminium, built-in antenna, ... : Material is MDF, horizontal designed, 2.1 audio, 5.25 speaker structure, undertone stronger, output is 30W3. Black with red aluminium ... line, it is more fashionable.4. Volume part, according ...