AI-Sonic S2-A500.1 is mono D class amplifier for users, who want to feel pure sound quality. Amplifier gives more power as there are mentioned at the specs. Finished dark cover, which profile is brushed black aluminium. When amplifier is on. There is indicator light in AI-Sonic logo! Includes a remote control, which has three different indicator-leds. (protection, power and clipping) Designed in Finland. (Bass level control sold separately.)